# Patent

## Title
Method and apparatus for composite part data extraction

## Abstract

A computer implemented method, apparatus, and computer usable program code for providing ply lay-up data for a composite part. A designation of a location is received for the composite part in a three dimensional object from a requester. A three dimensional model is opened in which the composite part is located. The ply lay-up data is extracted for a section within the composite part within the three dimensional model to form extracted ply lay-up data for the section. An output file is created containing a two dimensional drawing for the section with the ply lay-up data identifying a ply stacking sequence, an orientation of each ply in the ply stacking sequence, and a material for the each ply in the ply stacking sequence. The output file is returned to the requester.

## Background
BACKGROUND INFORMATION
1. Field
The present disclosure relates generally to composite parts and in particular to a method and apparatus for obtaining information about composite parts. Still more particularly, the present disclosure relates to a computer implemented method, apparatus, and computer usable program product for obtaining ply lay-up data for composite parts.
2. Background
Aircraft are being designed and manufactured with ever increasing percentages of composite materials. Some aircraft may have more than fifty percent of its primary structure made from composite materials. Composite materials are used in aircraft to decrease the weight of the aircraft. This decreased weight improves performance features, such as payload capacities and fuel efficiencies. Further, composite materials provide longer service life for various parts in an aircraft.
Composite materials are strong, light-weight materials, created by combining two or more dissimilar components. For example, a composite may include fibers and resins. The fibers and resins are combined and cured to form a composite material.
Further, by using composite materials, parts of an aircraft may be created in larger sections with fewer pieces, eliminating many fasteners. For example, the fuselage of an aircraft may be created in cylindrical sections with integral stringers. Another example is a stabilizer of an aircraft which may be created as a single piece incorporating spars and upper and lower skins with integral stiffeners.
When performing repairs on damaged aircraft composite parts, ply lay-up data, such as an identification of the number of plies, orientation of each ply, the location of each ply within the composite part, the ply material and the cured part thickness, is needed to replace the damaged material.
In some instances, two dimensional drawings may be present in a manual. Details of composite parts in these drawings include ply lay-up and part thickness data. This information includes an identification of each ply, the orientation of the ply, the location of the ply in the lay-up, the ply material, as well as thickness information for the part itself. This type of data is typically used to perform repairs to composite parts.
SUMMARY
The advantageous embodiments provide a computer implemented method, apparatus, and computer usable program code for providing ply lay-up data for a composite part. A designation of a location is received for the composite part in a three dimensional object from a requester. A three dimensional model is opened in which the composite part is located. The ply lay-up data is extracted for a section within the composite part within the three dimensional model to form extracted ply lay-up data for the section. An output file is created containing a two dimensional drawing for the section with the ply lay-up data identifying a ply stacking sequence, an orientation of each ply in the ply stacking sequence, and a material for the each ply in the ply stacking sequence. The output file is returned to the requester.
In another advantageous embodiment, a process for obtaining location on a composite part is received from a requester. Ply lay-up data is extracted for a section of the composite part within a three dimensional model containing the composite part to form extracted ply lay-up data. The extracted ply lay-up data is sent to the requester.
In yet another advantageous embodiment, a process obtains lay-up data for a composite part. A first user input to a user interface is received on a data processing system, wherein the user input selects a composite part. In response to receiving the first user input, a three dimensional object is displayed. A second user input is received selecting a location on the three dimensional object to form a selected location. The selected location is sent in a request to a server data processing system for the lay-up data. The lay-up data for the composite part is received in response to sending the request.
In another advantageous embodiment, an apparatus comprises a user application on a client data processing system and a data extraction tool on a server data processing system. The user application displays a three dimensional object for a composite part and receives user input selecting a location on the composite part. A data extraction tool receives the location on the composite part, extracts lay-up data for a section around the location from a three dimensional model containing the composite part to form extracted lay-up data, and returns the extracted lay-up data to the client data processing system.
In yet another advantageous embodiment, a computer program product provides lay-up data and comprises a computer readable media and program code. Program code is stored on the computer readable media for receiving a location on a composite part from a requester. Program code is stored on the computer readable media for extracting ply lay-up data for a section of the composite part within a three dimensional model containing the composite part to form extracted ply lay-up data. Also, program code is stored on the computer readable media for sending the extracted ply lay-up data to the requester.
In yet another advantageous embodiment, a data processing system comprises a bus, a communications unit connected to the bus, a storage device connected to the bus, in which the storage device includes computer usable program code, and a processor unit connected to the bus. The processor unit executes the computer usable program to receive a location on a composite part from a requester; extract ply lay-up data for a section of the composite part within a three dimensional model containing the composite part to form extracted ply lay-up data; and send the extracted ply lay-up data to the requester.
The features, functions, and advantages can be achieved independently in various embodiments of the present disclosure or may be combined in yet other embodiments in which further details can be seen with reference to the following description and drawings.



BRIEF DESCRIPTION OF THE DRAWINGS
The novel features believed characteristic of the advantageous embodiments are set forth in the appended claims. The advantageous embodiments, however, as well as a preferred mode of use, further objectives and advantages thereof, will best be understood by reference to the following detailed description of an advantageous embodiment of the present disclosure when read in conjunction with the accompanying drawings, wherein:
FIG. 1 is a diagram illustrating an aircraft manufacturing and service method in which an advantageous embodiment may be implemented;
FIG. 2 is a diagram of an aircraft in accordance with an advantageous embodiment;
FIG. 3 is a diagram illustrating a cross-section of a portion of an aircraft in accordance with an advantageous embodiment;
FIG. 4 is a pictorial representation of a network of data processing systems in which advantageous embodiments may be implemented;
FIG. 5 is a block diagram of a data processing system in which illustrative embodiments may be implemented;
FIG. 6 is a block diagram illustrating components used to provide ply lay-up data for a composite part in accordance with an advantageous embodiment;
FIG. 7 is a block diagram illustrating components used to generate a part file in accordance with an advantageous embodiment;
FIG. 8 is a diagram illustrating a part file in accordance with an advantageous embodiment;
FIG. 9 is a diagram illustrating ply layout data in accordance with an advantageous embodiment;
FIG. 10 is a diagram illustrating a user interface for searching for lay-up data for composite parts in accordance with an advantageous embodiment;
FIG. 11 is a diagram illustrating a user interface for searching for composite parts in accordance with an advantageous embodiment;
FIG. 12 is a diagram illustrating a display of a part file in accordance with an advantageous embodiment;
FIG. 13 is a diagram illustrating ply lay-up data returned in response to sending location data in accordance with an advantageous embodiment;
FIG. 14 is a flowchart of a process for generating ply lay-up data in accordance with an advantageous embodiment;
FIG. 15 is a flowchart of a process for generating a section cut in accordance with an advantageous embodiment;
FIG. 16 is a flowchart of a process for creating section cuts in accordance with an advantageous embodiment;
FIG. 17 is a flowchart of a process for selecting a location on a part in accordance with an advantageous embodiment; and
FIG. 18 is a flowchart for creating part files in accordance with an advantageous embodiment.



DETAILED DESCRIPTION
Referring more particularly to the drawings, embodiments of the disclosure may be described in the context of the aircraft manufacturing and service method 100 as shown in FIG. 1 and aircraft 200 as shown in FIG. 2. Turning first to FIG. 1, a diagram illustrating an aircraft manufacturing and service method is depicted in accordance with an advantageous embodiment. During pre-production, exemplary aircraft manufacturing and service method 100 may include specification and design 102 of aircraft 200 in FIG. 2 and material procurement 104. During production, part and subassembly manufacturing 106 and system integration 108 of aircraft 200 in FIG. 2 takes place. Thereafter, aircraft 200 in FIG. 2 may go through certification and delivery 110 in order to be placed in service 112. While in service by a customer, aircraft 200 in FIG. 2 is scheduled for routine maintenance and service 114, which may include modification, reconfiguration, refurbishment, and other maintenance or service.
Each of the processes of aircraft manufacturing and service method 100 may be performed or carried out by a system integrator, a third party, and/or an operator. In these examples, the operator may be a customer. For the purposes of this description, a system integrator may include, without limitation, any number of aircraft manufacturers and major-system subcontractors; a third party may include, without limitation, any number of venders, subcontractors, and suppliers; and an operator may be an airline, leasing company, military entity, service organization, and so on.
With reference now to FIG. 2, a diagram of an aircraft is depicted in which an advantageous embodiment may be implemented. In this example, aircraft 200 is produced by aircraft manufacturing and service method 100 in FIG. 1 and may include airframe 202 with a plurality of systems 204 and interior 206. Examples of systems 204 include one or more of propulsion system 208, electrical system 210, hydraulic system 212, and environmental system 214. Any number of other systems may be included. Although an aerospace example is shown, different advantageous embodiments may be applied to other industries, such as the automobile industry and the boat and ship building industry.
Apparatus and methods embodied herein may be employed during any one or more of the stages of aircraft manufacturing and service method 100 in FIG. 1. For example, parts or subassemblies produced in part and subassembly manufacturing 106 in FIG. 1 may be fabricated or manufactured in a manner similar to parts or subassemblies repaired or modified while aircraft 200 is in service 112 in FIG. 1.
Also, one or more apparatus embodiments, method embodiments, or a combination thereof may be utilized during production stages, such as part and subassembly manufacturing 106 and system integration 108 in FIG. 1, for example, without limitation, by substantially expediting the assembly of or reducing the cost of aircraft 200. Similarly, one or more of apparatus embodiments, method embodiments, or a combination thereof may be utilized while aircraft 200 is in service 112 in FIG. 1 or during maintenance and service 114 in FIG. 1. More specifically, the different advantageous embodiments may be used during maintenance and service 114 in FIG. 1 to provide ply lay-up data for use in maintenance operations, such as, for example, repair or modification of composite parts.
Turning to FIG. 3, a diagram illustrating a cross-section of a portion of an aircraft is depicted in accordance with an advantageous embodiment. In this example, part 300 is a composite part having plies 302. Part 300 may be, for example, without limitation, a portion of a fuselage, a wing, a stabilizer, or some other portion of an aircraft.
In this particular example, damage has occurred in section 304. Plies 302 may have different orientations and may include different materials in this particular example. To perform maintenance and/or repair on section 304 of part 300, knowledge of the ply lay-up data may be needed to properly repair part 300. Ply lay-up data is data describing the plies within a part. Ply lay-up data may include, for example, without limitation, ply stacking sequences, ply orientation, and ply materials. This type of data may be found within three dimensional models containing the composite part.
In this particular example, plies 306, 308, 310, 312, 314, 316, and 318 are used to perform the repair of section 304. These different plies are selected to have the same sequence, orientation, and materials to match up to plies within plies 302 to perform the repair, in this example.
The different illustrative embodiments recognize that although two dimensional drawings are currently used, if those drawings are unavailable, maintenance on composite parts would become more difficult. The different illustrative embodiments recognize that one potential solution is to extract the ply lay-up data from the three dimensional models themselves. These three dimensional models are engineering data sets that may be managed by a computer aided design program.
The different illustrative embodiments recognize that one potential solution to this problem is that the data for the composite parts may be extracted from the three dimensional models by the manufacturer or suppliers in advance for every composite part, or on demand during fleet support of the aircraft.
These types of solutions, however, have been recognized by the advantageous embodiments to be cost prohibitive, in many cases, depending on the quantity of the composite parts for a particular aircraft. Further, providing this information on demand may not comply with service level agreements between the aircraft manufacturer and customers.
Another potential solution is to provide the three dimensional models to the customers. This potential solution is recognized by the different illustrative embodiments also as being undesirable, in many cases, because of the requirements for the customers. For example, to view the models, customers would require access or use of computer aided design programs or viewers for those programs. These types of programs and viewers may have a cost that is unattractive to customers. Also, in addition to the cost for the additional software needed to extract the information, the customers also would need to have users that are trained to use the programs to locate the composite lay-up data for particular locations in the aircraft.
Another potential issue recognized by the advantageous embodiments is that the three dimensional models or information in the three dimensional models may be trade secret. This data may include specification and performance information about the aircraft. Other trade secret information in these models includes, for example, without limitation, architectural and structural information for the different parts of the aircraft, as well as their integration to form the aircraft. As a result, a manufacturer is often unwilling to provide these models to customers or maintenance companies.
Another potential issue recognized by the advantageous embodiments is that the three dimensional models or information in the three dimensional models may be regulated by export laws in the United States and other countries. This data may include production or development information about composite materials or laminates. Other export controlled information in these models includes, for example, without limitation, composite material properties, and the design of tools used to manufacture composite parts. As a result, a manufacturer is often legally unable to provide these models to customers or maintenance companies.
In recognizing the potential for an absence of two dimensional drawings and the other issues related with existing three dimensional models, the different advantageous embodiments provide a method, apparatus, and computer program product for obtaining ply lay-up data for composite parts.
With reference now to FIGS. 4-5, exemplary diagrams of data processing environments are provided in which advantageous embodiments may be implemented. It should be appreciated that FIGS. 4-5 are only exemplary and are not intended to assert or imply any limitation with regard to the environments in which the different embodiments may be implemented. Many modifications to the depicted environments may be made.
FIG. 4 is a pictorial representation of a network of data processing systems in which advantageous embodiments may be implemented. Network data processing system 400 is an example of a hardware environment in which different advantageous embodiments may be implemented. Specifically, network data processing system 400 may be used to implement an environment providing ply lay-up data for use in performing maintenance activities.
Network data processing system 400 is a network of computers in which the illustrative embodiments may be implemented. Network data processing system 400 contains network 402, which is the medium used to provide communications links between various devices and computers connected together within network data processing system 400. Network 402 may include connections, such as wire, wireless communication links, or fiber optic cables.
In the depicted example, server 404 and server 406 connect to network 402 along with storage unit 408. In addition, clients 410, 412, and 414 connect to network 402. Clients 410, 412, and 414 may be, for example, workstation computers or network computers. In the depicted example, server 404 provides data, such as boot files, operating system images, and applications to clients 410, 412, and 414. Clients 410, 412, and 414 are clients to server 404 in this example.
As depicted, client 410 is located in maintenance facility 416, while server 404 is located in manufacturer facility 418. Maintenance facility 416 is a location where maintenance and repairs may be performed on aircraft. The maintenance and repairs are referred to collectively as maintenance operations. Manufacturer facility 418 is a location where three dimensional models for aircraft may be created and/or maintained.
In these different examples, server 404 in manufacturer facility 418 may provide ply lay-up data for use in performing maintenance and repairs on aircraft to client 410 at maintenance facility 416. Manufacturer facility 418 may be owned by the same or separate entities from maintenance facility 416.
The ply lay-up data may be provided using network data processing system 400 in a manner that avoids some or all of the issues associated with an unavailability of two dimensional drawings and manuals or another hard copy form. For example, this data may be provided in a manner that avoids having a customer purchase and operate computer aided design software to view three dimensional models.
The different embodiments also may be used to limit the amount of data that is provided to other parties or users. The manufacturer of the aircraft does not need to supply three dimensional models that may contain confidential data to customers. Instead, only data relating to the ply lay-up of the part for which maintenance is being performed is provided, in the different examples.
Network data processing system 400 may include additional servers, clients, and other devices not shown. In the depicted example, network data processing system 400 is the Internet with network 402 representing a worldwide collection of networks and gateways that use the Transmission Control Protocol/Internet Protocol (TCP/IP) suite of protocols to communicate with one another. At the heart of the Internet is a backbone of high-speed data communication lines between major nodes or host computers, consisting of thousands of commercial, governmental, educational and other computer systems that route data and messages. Of course, network data processing system 400 also may be implemented as a number of different types of networks, such as for example, an intranet, a local area network (LAN), or a wide area network (WAN). FIG. 4 is intended as an example, and not as an architectural limitation for the different embodiments.
With reference now to FIG. 5, a block diagram of a data processing system is shown in which illustrative embodiments may be implemented. Data processing system 500 is an example of a computer, such as server 404 or client 410 in FIG. 4, in which computer usable program code or instructions implementing the processes may be located for the illustrative embodiments. In this illustrative example, data processing system 500 includes communications fabric 502, which provides communications between processor unit 504, memory 506, persistent storage 508, communications unit 510, input/output (I/O) unit 512, and display 514.
Processor unit 504 serves to execute instructions for software that may be loaded into memory 506. Processor unit 504 may be a set of one or more processors or may be a multi-processor core, depending on the particular implementation. Further, processor unit 504 may be implemented using one or more heterogeneous processor systems in which a main processor is present with secondary processors on a single chip. As another illustrative example, processor unit 504 may be a symmetric multi-processor system containing multiple processors of the same type.
Memory 506, in these examples, may be, for example, a random access memory or any other suitable volatile or non-volatile storage device. Persistent storage 508 may take various forms depending on the particular implementation. For example, persistent storage 508 may contain one or more components or devices. For example, persistent storage 508 may be a hard drive, a flash memory, a rewritable optical disk, a rewritable magnetic tape, or some combination of the above. The media used by persistent storage 508 also may be removable. For example, a removable hard drive may be used for persistent storage 508.
Communications unit 510, in these examples, provides for communications with other data processing systems or devices. In these examples, communications unit 510 is a network interface card. Communications unit 510 may provide communications through the use of either or both physical and wireless communications links.
Input/output unit 512 allows for input and output of data with other devices that may be connected to data processing system 500. For example, input/output unit 512 may provide a connection for user input through a keyboard and mouse. Further, input/output unit 512 may send output to a printer. Display 514 provides a mechanism to display information to a user.
Instructions for the operating system and applications or programs are located on persistent storage 508. These instructions may be loaded into memory 506 for execution by processor unit 504. The processes of the different embodiments may be performed by processor unit 504 using computer implemented instructions, which may be located in a memory, such as memory 506. These instructions are referred to as program code, computer usable program code, or computer readable program code that may be read and executed by a processor in processor unit 504. The program code in the different embodiments may be embodied on different physical or tangible computer readable media, such as memory 506 or persistent storage 508.
Program code 516 is located in a functional form on computer readable media 518 and may be loaded onto or transferred to data processing system 500 for execution by processor unit 504. Program code 516 and computer readable media 518 form computer program product 520 in these examples. In one example, computer readable media 518 may be in a tangible form, such as, for example, an optical or magnetic disc that is inserted or placed into a drive or other device that is part of persistent storage 508 for transfer onto a storage device, such as a hard drive that is part of persistent storage 508. In a tangible form, computer readable media 518 also may take the form of a persistent storage, such as a hard drive or a flash memory that is connected to data processing system 500. The tangible form of computer readable media 518 is also referred to as computer recordable storage media.
Alternatively, program code 516 may be transferred to data processing system 500 from computer readable media 518 through a communications link to communications unit 510 and/or through a connection to input/output unit 512. The communications link and/or the connection may be physical or wireless in the illustrative examples. Computer readable media 518 also may take the form of non-tangible media, such as communications links or wireless transmissions containing the program code.
The different components illustrated for data processing system 500 are not meant to provide architectural limitations to the manner in which different embodiments may be implemented. The different illustrative embodiments may be implemented in a data processing system including components in addition to or in place of those illustrated for data processing system 500. Other components shown in FIG. 5 can be varied from the illustrative examples shown.
As one example, a storage device in data processing system 500 is any hardware apparatus that may store data. Memory 506, persistent storage 508 and computer readable media 518 are in a tangible form. In another example, a bus system may be used to implement communications fabric 502 and may be comprised of one or more buses, such as a system bus or an input/output bus. Of course, the bus system may be implemented using any suitable type of architecture that provides for a transfer of data between different components or devices attached to the bus system. Additionally, a communications unit may include one or more devices used to transmit and receive data, such as a modem or a network adapter. Further, memory may be, for example, memory 506 or a cache such as found in an interface and memory controller hub that may be present in communications fabric 502.
The different advantageous embodiments provide a computer implemented method, apparatus, and computer usable program product for locating ply lay-up data for a composite part. In the different examples, a designation of a location for a composite part is received. The location of the composite part is used to extract ply lay-up data for a section of the composite part within a three dimensional model to form extracted ply lay-up data sent to the requester. In these examples, this extracted ply lay-up data is sent in a format allowing the requester to perform maintenance on the composite part without having access to a three dimensional model containing the composite part. Further, the different advantageous embodiments provide this information without requiring a user or operator to have access to or have knowledge to operate a computer aided design program.
Turning now to FIG. 6, a block diagram illustrating components used to provide ply lay-up data for a composite part is depicted in accordance with an advantageous embodiment. In this example, maintenance environment 600 is an environment in which lay-up data for composite parts may be identified for use in performing maintenance operations.
As depicted, maintenance environment 600 includes client 602, server 604, and server 606. Client 602 includes part application 608 and user interface 610. Server 604 includes data extraction tool 612, and server 606 contains part file generation tool 614. In these examples, client 602 may be, for example, client 410 located in maintenance facility 416 in FIG. 4. Server 604 may be implemented using server 404 in maintenance facility 418 in FIG. 4. Also, server 606 may be implemented using the same server or another server, such as server 406 in FIG. 4.
These maintenance operations may include repairs of composite parts, such as composite part 300 in FIG. 3. Part application 608 may access part files database 616 to identify the composite part in part files database 616. Further, when a user or other operator of part application 608 selects or identifies a part, part application 608 may display a three dimensional representation of the part on user interface 610 to identify a location on the composite part for maintenance. For example, the user may select a particular location on a three dimensional object of a part displayed through user interface 610 to indicate the location at which a repair or other maintenance operation is to occur for that composite part.
The selection of this location generates location data 618. In these examples, location data 618 may be three dimensional coordinates defining a location on the composite part that needs maintenance. More specifically, location data 618 includes the location in X, Y, and Z coordinates. Of course, other coordinate systems may be used, depending on the particular implementation. As another example, a spherical coordinate system may be used to identify the location of the composite part. Further, location data 618 also may include an identification of the composite part. This identification may be, for example, a part number. Location data 618 also may include, for example, without limitation, an identification of the type of aircraft or even a specific aircraft using a tail number.
Data extraction tool 612 executing on server 604 receives location data 618 from part application 608. Data extraction tool 612 may be a separate program or application which makes calls to a computer aided design application to obtain access to three dimensional models. In other embodiments, data extraction tool 612 may take the form of a process that is part of the computer aided design application. In these examples, the computer aided application may be, for example, CATIA V5R17. This type of program is available from Dassault Systemes.
When implemented as a separate application, data extraction tool 612 may access files for three dimensional models within three dimensional model database 626 in a number of different ways. For example, data extraction tool 612 may directly access these files. In other embodiments, data extraction tool 612 may make calls to the computer aided design application to obtain and manipulate data about plies.
In these examples, standard computer aided design application programming interfaces are used to obtain the composite part in the document, the sequences in the part, the plies in a sequence, the surface that supports the ply, the geometry of the ply, the materials the ply is made of, and the orientation of the ply. Data extraction tool 612 identifies a three dimensional model containing the composite part within three dimensional model database 626 using location data 618.
Additionally, data extraction tool 612 extracts a set of sections from three dimensional model database 626 to generate output 628. The set of sections may be one or more sections, in these examples. The number of sections extracted may vary, depending on different implementations. These sections may be selected to contain and be around the location identified in location data 618. In the depicted examples, the set of sections is selected to be sufficient to provide enough information for performing the maintenance operation.
In these examples, a section is a cross-section of the composite part. The section is generated perpendicular to the surface of the part for some maximum allowable or selected length. For example, a section cut may be a cross-section that is up to 36 inches long. A section may be made or cut some number of set inches away from another section. The distances between sections may be, for example, 3 inches, 6 inches, or 9 inches. These sections are parallel to each other, in these examples.
Output 628 may be, for example, a drawing identifying the ply stacking sequence for the composite part. Further, output 628 also may include other information, such as orientation and materials for each ply. Output 628 also may include other information. For example, a three dimensional object for the part may be returned with an indication of identification of the location for each section for which ply lay-up data is present within output 628. In other examples, a two dimensional drawing or grid may be returned with identifications of the sections with respect to the part in output 628. Output 628 is returned as ply lay-up data 630 to part application 608. Part application 608 may then display ply lay-up data 630 to the user for use in performing the maintenance operation on the composite part.
The three dimensional objects in part files database 616 are for example, without limitation, solid objects that provide sufficient detail for a user to select a location for which ply lay-up data 630 is needed. These three dimensional objects, however, do not include other data that may be sensitive or confidential to a manufacturer of the aircraft.
For example, details about other parts, their assembly, and architecture are not provided in these examples. For example, information about wiring, electronics, and assembly of substructures do not need to be provided for use in maintenance of composite parts. Additionally, this type of implementation allows a manufacturer to provide ply lay-up data in a faster manner as compared to having their own users locate and extract the data themselves. This type of architecture provides a quicker means for communication and avoids having the user manually measure and identify the coordinates on the aircraft.
As can be seen in this illustrative embodiment, ply lay-up data 630 may be supplied to a user to perform maintenance on an aircraft without needing manuals containing three dimensional drawings of the composite parts. Further, access to a three dimensional model also is unnecessary with this type of method and apparatus.
Part file generation tool 614, in these examples, may be implemented using any software that is capable of creating a three dimensional solid object for display from a three dimensional model, such as a computer aided design file for a particular part. For example, the Right Hemisphere® 5 platform is an example of a software product that may be used to create three dimensional object's part files in part files database 616. Right Hemisphere® 5 platform is a software product available from Right Hemisphere®. Further, part file generation tool 614 also may include processes to create code or scripts to display and receive identifications of location data 618.
Part application 608 or client 602 may display a part file from part files database 616 or user interface 610. Each part file allows a user to see and select a location on a part to generate location data 618.
In these examples, part files database 616 may be generated by part file generation tool 614 executing on server 606. Part file generation tool 614 may use data from three dimensional model database 626 to generate three dimensional objects for part files database 616.
The different components illustrated in maintenance environment 600 have been presented for purposes of depicting one or more advantageous embodiments. The particular organization of components is not meant to limit the manner in which different functions may be placed in different embodiments. For example, in some embodiments, server 604 and server 606 may be the same data processing system.
Turning now to FIG. 7, a block diagram illustrating components used to generate a part file is depicted in accordance with an advantageous embodiment.
In this example, part file generation tool 700 is an example of part file generation tool 614 in FIG. 6. As depicted, part file generation tool 700 includes control process 702 and object creator 704. Control process 702 may send call 706 to computer aided design tool 708 to retrieve three dimensional model 710. In these examples, computer aided design tool 706 may be, for example, CATIA V5R17.
Control process 702 uses object creator 704 to create a three dimensional object for part file 712. Additionally, control process 702 also adds code 714 to part file 712 to complete part file 712. Control process 702 may be used to ensure that the transfer of three dimensional model 710 from computer aided design tool 708 is performed in a secure manner.
Turning now to FIG. 8, a diagram illustrating a part file is depicted in accordance with an advantageous embodiment. In this example, part file 800 includes three dimensional object 802 and code 804. Code 804 provides processes for receiving user input to identify a location on three dimensional object 802. Further, code 804 may include processes to send the location information to another process, such as part application 608 or data extraction tool 612 in FIG. 6. In these examples, code 804 allows a user to select a location on three dimensional object 802. In these examples, code 804 takes the form of JavaScript®. JavaScript® is a scripting language typically used for client side web development. Of course, code 804 may be implemented using any type of language suitable for the particular implementation. JavaScript® is a registered trademark of Sun Microsystems, Inc.
The selection of this location may be translated into three dimensional coordinates, such as X, Y, and Z coordinates. Three dimensional object 802, in these examples, is a solid representation of the particular part. Three dimensional object 802 only provides a visual view of the part and does not include other information that may be found within a three dimensional model. In this manner, part file 800 may be smaller in size. The user may perform various manipulations of three dimensional object 802. These manipulations include rotate, zoom, measure, and change lighting.
When a user has confirmed the selection of the particular location on three dimensional object 802, the three dimensional location information is then transmitted to a part application, such as part application 608 in FIG. 6. In turn, the part tool may send the location data to a data extraction tool, such as data extraction tool 612 in FIG. 6. In other implementations, code 804 may directly send the location data to the data extraction tool.
In these examples, part file 800 may be implemented using a number of different types of files. For example, part file 800 may be, for example, a three dimensional PDF document. Further, other types of files may be created to contain three dimensional object 802. For example, three dimensional object 802 may be included in a word processing document generated using Word 2007 which is a product of Microsoft Corporation.
With reference now to FIG. 9, a diagram illustrating ply layout data is depicted in accordance with an advantageous embodiment. In this example, ply layout data file 900 is an example of a file containing ply layout data for a particular part. Ply layout data file 900 is an example of output 628 in FIG. 6. This data file may be transmitted as ply lay-up data 630 in FIG. 6.
Ply layout data file 900 includes, in these examples, two dimensional ply stacking sequence drawing 902, orientation information 904, materials information 906, and grid 908.
In the different advantageous embodiments, two dimensional ply stacking sequence drawing 902 is a two dimensional drawing identifying the stacking sequence for the particular section of the part selected by the user. Although the ply stacking sequence is presented as a two dimensional drawing in these examples, other embodiments may provide the ply stacking sequence information in different forms. For example, a table may be presented to identify the sequence of plies within the composite part.
Orientation information 904 identifies the orientation of each ply within the stacking sequence. Materials information 906 identified the type of material for each ply within the stacking sequence. Grid 908, in these examples, provides a two dimensional diagram of the composite part in which the different sections are associated with the set of sections containing ply lay-up data.
In this example, ply layout data file 900 contains a single section around the location selected by the user. In other advantageous embodiments, ply layout data file 900 may include sections for other areas of the part in addition to the location selected by the user. Of course, ply layout data file 900 may include other information in addition to or in place of information illustrated in these examples. For example, ply layout data file 900 also may include a three dimensional object identifying the location for which the ply layout data is provided. This three dimensional object may be the same three dimensional object used by the operator to select a location for which ply lay-up data is desired. The three dimensional object may be in addition to or in place of grid 908, depending on the particular implementation.
Turning now to FIG. 10, a diagram of a user interface for searching for lay-up data for composite parts is depicted in accordance with an advantageous embodiment. In this example, window 1000 provides a user interface for composite parts. Window 1000 is an example of a user interface, such as user interface 610 in FIG. 6.
In these examples, window 1000 contains fields 1002, 1004, 1006, 1008 and 1010. Field 1002 allows a user to select a model for the particular aircraft. Field 1004 allows a user to enter a part number for the composite part of interest. Field 1006 allows the user to enter a customer code to identify a specific customer. The code is a three digit alpha numeric code that identifies a customer. A part name may be entered in field 1008. This part name is an identifier of the part, such as a fastener, rib, or wing panel. A product may be entered in field 1010. Field 1010 allows the user to enter a product.
Window 1000 also includes fields 1012, 1014, and 1016. Field 1012 allows a user to select an aircraft identification type. Fields 1014 and 1016 allow a user to select from different airplanes of the particular type. The airplane identification type offers a choice of methods by which a specific airplane can be identified. Fields 1014 and 1016 then allow a user to enter the airplane identification for the specific airplane(s), such as, for example, the line number for the actual airplane that requires repair.
When the user has entered information for the search, the user may begin the search for the part file by selected control 1018. If the user wishes to re-enter or change some information, the user may select control 1020.
Turning now to FIG. 11, a diagram illustrating a user interface for searching for composite parts is depicted in accordance with an advantageous embodiment. In this example, window 1000 is shown as presenting examples of results from a search for composite parts. As depicted, entries 1100, 1102, 1104, and 1106 are examples of results returned from a search for a composite part. Each entry includes a part number, part name, revision identification, and status.
Further, each entry also allows a user to select a part for presentation. This selection may be made through icons 1108, 1110, 1112, and 1114. Selection of one of these icons initiates the display of a part file, such as part file 800 in FIG. 8. Alternatively, a user may manually submit a request for a section by selecting links 1116, 1118, 1120, or 1122. Selection of these links allows a user to manually enter location information for a particular part. In some embodiments, a user may desire to manually enter the location information if measurements of the actual part have been made.
Turning now to FIG. 12, a diagram illustrating a display of a part file is depicted in accordance with an advantageous embodiment. Display 1200 is an example of a display that may be presented within user interface 610 in FIG. 6. Display 1200 is an example of a part file that is displayed to obtain user input identifying a location on a composite part. In this example, display 1200 includes three dimensional object 1202, which is a solid three dimensional object from which a user may select a location on three dimensional object 1202 to obtain location information.
As depicted, three dimensional object 1202 is a solid representation of the composite part. Although a solid model is present in these examples, other types of representations may be used. For example, a surface model may be used. Other information that may be contained in a three dimensional model other than the graphical presentation of the part may be left out of the part file. In this manner, trade secret, confidential, or export controlled information may be maintained due to this type of distribution of information.
When the user selects a point on three dimensional object 1202, such as point 1204, window 1200 displays three dimensional coordinate information data 1206. In this example, this coordinate information includes X coordinate 1208, Y coordinate 1210, and Z coordinate 1212. As the user selects different points on three dimensional object 1202, three dimensional coordinate information 1206 displayed in window 1200 changes to indicate the selected location. In these examples, the selection may be made by moving a pointer, such as pointer 1216 to a desired location on three dimensional object 1202 and initiating a command. This command may be, for example, without limitation, a right-click of a mouse button or the pressing of a function key.
When the user has selected a particular point on which ply layout data is desired, the user may select control 1214 to send three dimensional coordinate information data 1206 to a server for processing. In these examples, three dimensional coordinate information data 1206 may be sent to part application 608 in FIG. 6, which in turns sends the information as location data 618 to data extraction tool 612 in FIG. 6. In other embodiments, location data 618 may be sent directly to data extraction tool 612 in FIG. 6.
With reference next to FIG. 13, a diagram illustrating ply lay-up data returned in response to sending location data is depicted in accordance with an advantageous embodiment. Display 1300 is an example of a display that may be presented through user interface 610 in FIG. 6. In this example, display 1300 presents ply lay-up data extracted from a three dimensional model in response to receiving location data about a particular part.
In this example, section 1302 in display 1300 shows a stacking sequence for eight plies. The identification of the sequence, the ply number, the orientation, and the material are shown in entries 1304, 1306, 1308, 1310, 1312, 1314, 1316, and 1318. These entries correspond to the display in section 1302. Entries 1304, 1306, 1308, 1310, 1312, 1314, 1316, and 1318 are for a particular section within the part.
The location of section 1302 may be identified through grid 1320. As described above, grid 1320 may be a three dimensional drawing of a top surface of the part with grid markings to associate section 1302 with the appropriate place on the part. In this particular example, grid 1320 includes sections 1322, 1324, 1326, 1328, 1330, 1332, 1334, 1336, 1338, and 1340. Each of these sections represents a section or cross-section of the composite part. These sections may also be referred to as cuts.
In these examples, the orientation of section 1302 and plies 1304, 1306, 1308, 1310, 1312, 1314, 1316, and 1318 is made relative to the part. An example, without limitation, is shown using reference axis 1342 to relate this ply lay-up data to grid 1320.
In this example, the display of information is for section 1332. Section 1332 is identified as being associated with section 1302 through a graphical indicator to identify the location on the part for which ply lay-up data is displayed. Each of these sections may be, for example, 9 inches, 6 inches, or 3 inches apart. The length of these sections may vary, depending on a selection by the user or a default value in these examples. Grid 1320 covers an entire part, in these examples. In this particular illustrative example, information for section 1302 is displayed. Reference axis 1342 may be included in the output file to show the orientation relationship of section 1302 and plies 1304, 1306, 1308, 1310, 1312, 1314, 1316, and 1318 relative to grid 1320.
In other embodiments, additional sections may be present in the lay-up data. These additional sections in the set of sections may be presented in the same manner as illustrated in display 1300. The different sections may be associated with other entries within grid 1320.
Turning now to FIG. 14, a flowchart of a process for generating ply lay-up data is depicted in accordance with an advantageous embodiment. The process illustrated in FIG. 14 may be implemented in a software component, such as data extraction tool 612 in FIG. 6, in these examples.
The process begins by receiving a designation of the location on a composite part (operation 1400). In these examples, the designation of the location may be received as location data 618 in FIG. 6. Further, the designation also may include an identification of the part for which ply lay-up data is desired. The process then extracts the ply lay-up data for a section of the composite part within a three dimensional model containing the composite part to form extracted ply lay-up data (operation 1402). Of course, depending on the particular implementation, more than one section may be extracted in operation 1402. Additionally, in other embodiments, the section extracted in operation 1402 may be sub-divided into a set of sections or sub-sections. Thereafter, the extracted ply lay-up data is sent to the requester (operation 1404). The process then performs the maintenance operation on the composite part using the extracted ply lay-up data (operation 1406). The process terminates thereafter.
With reference now to FIG. 15, a flowchart of a process for generating a section cut is depicted in accordance with an advantageous embodiment. The process in FIG. 15 is a more detailed explanation of operation 1402 in FIG. 14.
The process begins by receiving the location data (operation 1500). The process finds the composite part (operation 1502). In these examples, the composite part may be identified from the part application that may be received from the location information. The process then finds the surface and rosette for the part (operation 1504). A rosette is an axis system in which the ply orientations are defined, on the Z=0 plane relative to the X axis. Reference axis 1342 in FIG. 13 is an example of a rosette.
Next, the process creates an axis system at the selected location (operation 1506). The selected location is identified from the coordinate information received in the location data. In these examples, the axis system has a Z vector normal to the surface of the composite part. The axis system has an X vector that is parallel to the x-axis of the rosette.
The process identifies the size of the part (operation 1508). The process then selects a set of sections using the size of the part (operation 1510). In identifying or selecting the set of sections, a number of sections and the location of the sections may be selected. Default or maximum sizes for the sections may be identified. For example, the area to be cut may be no more than 18 inches on either side of the X=0 and Y=0 planes. The set of sections may be, for example, a set of subsections for a section around the location selected by the user. For example, the set of sections may be subdivided from a section that is 0.5 yards to the right and left of the location and 0.5 yards above and below the location.
The process then creates section cuts (operation 1512). Operation 1512 is used to identify the ply stacking sequence, in these examples. In generating section cuts, the process generates the section cuts along the x-axis first, then along the y-axis.
Additionally, the process retrieves orientation and material information for the sections (operation 1514). The process then creates the output file (operation 1516), with the process terminating thereafter. In these examples, the output file includes the section cuts as well as the orientation and material data. Further, a grid may be present to identify the location of each section.
Turning now to FIG. 16, a flowchart of a process for creating section cuts is depicted in accordance with an advantageous embodiment. The process illustrated in FIG. 16 is a more detailed description of operation 1512 in FIG. 15. The process begins by identifying a base surface supporting the plies at the selected location (operation 1600). Next, the base surface is intersected with a plane (operation 1602). A linear approximation of the surface and a plane intersection is performed (operation 1604). The resulting U and V coordinates are stored in a base coordinates array (operation 1606). The process generates intersections between the plane and the ply. A linear approximation of the resulting intersection is performed. The result is a series of points with x, y, and z coordinates. The points are all on the plane, which has its own u, v coordinate system. The values that are stored are the u and v coordinates of the point on the plane, relative to the plane origin.
These coordinates are copied into a top coordinates array (operation 1608). At this point, the base coordinates array and the top coordinates array have the same values. As processing of the different plies in the section occur, the top coordinates array is updated. The final resulting values for the top coordinates array is the top surface of the upper most ply in the section.
Thereafter, an unprocessed ply intersected by the plane closest to the base surface is identified (operation 1616). A linear approximation of the ply and plane intersection is performed (operation 1618). The resulting U and V coordinates are stored in a coordinate array (operation 1620).
Next, a determination is made as to whether the direction of the coordinates in the coordinate array is the same as the direction of the coordinates in the base coordinate array (operation 1622). If the coordinates are not in the same direction in the two arrays, the direction of the values for the coordinates in the coordinate array are reversed to match the same direction as the base coordinate array (operation 1624).
When the ply/plane intersection is performed, the result is one or more curves. These curves have inherent start and end points used by the process. The process projects the start and end points of the segment in a direction normal to the base coordinate array onto the top coordinate array (operation 1626). The process proceeds directly to this operation from operation 1622 if the direction of the coordinate array and the base coordinate array are the same.
The process offsets the portion of the top coordinates array between the segment end points by the thickness of the ply (operation 1628). Operation 1628 changes the values in the top coordinate array to reflect the top of the ply that is being processed. The offset represents the plies actual position in space. The process then updates the top coordinate array to reflect the top of the ply (operation 1630). The end points of the ply/plane intersection curve are projected onto the line segments defined in the top coordinate array, defining the bottom of the ply. The segments between the endpoints are offset by the scaled thickness, defining the top of the ply. Next, a determination is made as to whether additional unprocessed plies are present (operation 1632). If additional plies are present, the process returns to operation 1616 as described above to select another ply for processing.
If additional unprocessed plies are not present, the process then draws or creates the offset segments for each of the plies for the output (operation 1634). These offset segments for the plies are used in a two dimensional drawing to identify the ply stacking sequence. The process labels the segments so that each segment may be identified (operation 1636), with the process terminating thereafter.
In these examples, the planes are created perpendicular to the X vector and the Y vector. These planes may have various spacing. For example, the X planes may range from X=−18 to X=+18, and the Y planes may range from Y=−18 to Y=+18, with respect to the damage location. The range of the planes may be smaller if the part does not extend as far as the plane for the selected value. With the selected plane, a number of cuts are created. These different cuts are based on the length and width of the part. The cuts, however, in these examples, have a default value that is not less than 3 inches. The actual spacing may be adjusted such that all of the cuts are the same distance apart. Of course, other default values may be used, depending on the particular implementation.
As an example, if the damage location is 16 inches from the edge of the part, the range of the cuts in the X direction would be from −16 to +18 for a total of 34 inches. If the spacing is specified as 6 inches, it is adjusted to 5.667, so the cuts are taken at the following X values: −16, −10.333, −4.667, 1, 6.667, 12.333, and 18. As another example, if the part is 14 inches wide, the damage is in the center of the part, and a spacing of 3 inches is requested, the spacing may adjusted to provide cuts that are 2.8 inches apart. These cuts may be at X values as follows: −7, −4.2, −1.4, 1.4, 4.2, and 7.
Turning now to FIG. 17, a flowchart of a process for selecting a location on a part is depicted in accordance with an advantageous embodiment. The process illustrated in FIG. 17 may be implemented in a software component, such as code 804 in part file 800 in FIG. 8.
The process begins by displaying the three dimensional object in the part file (operation 1700). The process then waits for a user input (operation 1702). This user input may take various forms, such as, for example, without limitation, manipulating the three dimensional object, selecting a location on the three dimensional object, and submitting the location information to obtain ply lay-up data.
A determination is made as to whether the user input is to manipulate the three dimensional object (operation 1704). If the user input is to manipulate the three dimensional object, the selected manipulation is performed (operation 1706), with the process then returning to operation 1702. In operation 1706, the user may perform various actions, such as, for example, rotate the object, zoom, or pan.
If in operation 1704 the user input is not to manipulate the three dimensional object, a determination is made as to whether the user input selects a location on the three dimensional object (operation 1708). If the user input selects a location, the location identification is identified based on the user selection (operation 1710). The location information is displayed (operation 1712), with the process then returning to operation 1702 as described above. This location information may be, for example, in the form of X, Y, and Z coordinates.
With reference again to operation 1708, if the user does not select a location, a determination is made as to whether the user is to submit location information (operation 1714). If the user is to submit the location information, the process sends the location information (operation 1716), with the process terminating thereafter. In these examples, the location information may be sent to another application, such as, for example, part application 608 or data extraction tool 612 in FIG. 6.
Turning back to operation 1714, if the user input is not a submission of the location information, a determination is made as to whether the user has decided to end the process (operation 1718). If the user has decided to end the process, the process terminates. Otherwise, the process returns to operation 1702 to wait for additional user input. In this instance, the user input is some input not handled by the process illustrated in this figure.
Turning now to FIG. 18, a flowchart for creating part files is depicted in accordance with an advantageous embodiment. The process illustrated in FIG. 18 may be implemented in a software component, such as part file generation tool 614 in FIG. 6 to make part files for part files database 616 in FIG. 6. An example of a part file is part file 800 in FIG. 8.
The process begins by selecting an unprocessed part (operation 1800). Thereafter, the process sends a call to the computer aided design application for a three dimensional object for the part (operation 1802). This call may be made through various application program interface calls that are available on many computer aided design programs. In these examples, the computer aided design program may be CATIA V5R17. The process then receives a three dimensional model in response to the call (operation 1804).
The process creates a three dimensional object in a file from the three dimensional model (operation 1806). Operation 1806 creates a three dimensional object without additional data that may be present in the three dimensional model. Operation 1806 may be performed using a software program such as, for example, the Right Hemisphere 5 platform.
Thereafter, code is added to the file to enable identification of three dimensional coordinate information (operation 1808). Operation 1808 may add a code, such as code 804 in FIG. 8. Thereafter, the completed file is stored in a parts file database (operation 1810). The process then determines whether additional unprocessed parts are present (operation 1812). If additional unprocessed parts are present, the process returns to operation 1800 to select another unprocessed part; otherwise, the process terminates.
The flowcharts and block diagrams in the different depicted embodiments illustrate the architecture, functionality, and operation of some possible implementations of apparatus, methods and computer program products. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of computer usable or readable program code, which comprises one or more executable instructions for implementing the specified function or functions. In some alternative implementations, the function or functions noted in the block may occur out of the order noted in the figures. For example, in some cases, two blocks shown in succession may be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved.
Thus, the different advantageous embodiments provide a computer implemented method, apparatus, and computer program product for providing ply lay-up data for a composite part. A location on a composite part is received from a requester. Ply lay-up data is extracted for a section of the composite part within a three dimensional model containing the composite part to form extracted ply lay-up data. The extracted ply lay-up data is sent to the requester.
In this manner, some or all of the different advantageous embodiments may allow for an identification of ply layout data for use in performing maintenance operations. This identification of the ply layout data may be made without an operator or requester of the data having to access a three dimensional model. Instead, the operator may identify a location on the part for which a maintenance operation is needed and receive the ply lay-up data for that location. In these examples, a section or sections is returned containing the ply lay-up data.
The different advantageous embodiments may provide an ability to process the request for ply lay-up data using a tool to automatically generate the cuts. In this manner, the operator does not need to have access to the three dimensional model. Further, the operator also does not need to have knowledge of how to operate the applications used in creating the three dimensional models. Further, the different advantageous embodiments also provide an ability to restrict access to data in three dimensional models but still provide ply lay-up data.
The different embodiments also create output files that do not require obtaining export licenses for customers who might be in other countries because any sensitive information is not included. The output or ply lay-up data generated can be exported to other countries, not under embargoes, without export licenses.
Another feature provided by the different embodiments is the ability to only provide ply lay-up data on demand for a limited portion of the aircraft. Further, requests made by users can be tracked and access to data may be terminated or restricted if abuses are detected. For example, if a user makes requests for different portions of an aircraft that exceed some threshold, then the ability to receive ply lay-up data can be terminated.
The description of the different advantageous embodiments has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. Further, different advantageous embodiments may provide different advantages as compared to other advantageous embodiments. The embodiment or embodiments selected are chosen and described in order to best explain the principles of the embodiments, the practical application, and to enable others of ordinary skill in the art to understand the disclosure for various embodiments with various modifications as are suited to the particular use contemplated.

## Claims

1. A computer implemented method for providing ply lay-up data for a composite part to a requestor, the computer implemented method comprising:
creating a three dimensional object of a composite part from a three dimensional model of the composite part, wherein the three dimensional model includes controlled data and the three dimensional object excludes the controlled data, the controlled data comprising at least one of confidential information and information subject to export control laws;
displaying the three dimensional object to the requestor;
receiving a designation of a location for the composite part in the three dimensional object from the requestor, wherein the three dimensional object allows the requestor to designate a location for the composite part but does not disclose the controlled data;
opening the three dimensional model in which the composite part is located;
extracting the ply lay-up data for a section within the composite part within the three dimensional model to form extracted ply lay-up data for the section;
creating an output file containing a two dimensional drawing for the section with the ply lay-up data identifying a ply stacking sequence, an orientation of each ply in the ply stacking sequence, and a material for the each ply in the ply stacking sequence;
wherein the extracted ply lay up data is configured to allow the requestor to perform maintenance on the composite part without accessing a three dimensional model of the composite part; and
returning the output file to the requestor,
wherein at least one of the steps is performed on the computer.

2. The computer implemented method of claim 1 further comprising:
displaying the three dimensional object on a display; and
receiving a user input for the designation of the location for the composite part in the three dimensional object.

3. The computer implemented method of claim 1, wherein the receiving, opening, extracting, creating, and returning steps are performed on a server computer.

4. The computer implemented method of claim 1, wherein the section comprises a cross-section of the composite part and the cross-section is generated substantially perpendicular to a surface of the composite part, and further comprising the steps of:
displaying the three dimensional object representing the composite part; and
receiving a user input designating the location.

5. The computer implemented method of claim 1 further comprising:
performing a maintenance operation on the composite part.

6. A computer implemented method for providing ply lay-up data for a composite part, the computer implemented method comprising:
creating a three dimensional object of a composite part from a three dimensional model of the composite part, wherein the three dimensional model includes controlled data and the three dimensional object excludes the controlled data;
displaying the three dimensional object to a requestor;
receiving a location on the composite part from the requestor;
extracting the ply lay-up data for a section of the composite part within a three dimensional model containing the composite part to form extracted ply lay-up data;
wherein the extracting step comprises:
identifying a set of sections from the location, wherein a section comprises a cross-section of the composite part and the cross-section is generated substantially perpendicular to a surface of the composite part;
forming a two dimensional drawing of plies in the section;
associating ply orientation data with the plies; and
associating material data with the plies; and

sending the extracted ply lay-up data to the requestor,
wherein the extracted ply lay up data is configured to allow the requestor to perform maintenance on the composite part without accessing a three dimensional model of the composite part and does not disclose controlled data to the requestor; and
wherein at least one of the steps is performed on the computer.

7. The computer implemented method of claim 6 further comprising:
performing a maintenance operation using the extracted ply lay-up data.

8. The computer implemented method of claim 6 further comprising:
displaying a three dimensional object of the composite part to the requestor, wherein the three dimensional object allows the requestor to designate a location for the composite part but does not disclose controlled data to the requestor; and
receiving a user input selecting the location on the composite part.

9. The computer implemented method of claim 8 further comprising:
performing the displaying step and the receiving step on a client computer using a part file.

10. A method for obtaining lay-up data for a composite part, the method comprising:
receiving a first user input to a user interface on a data processing system, wherein the first user input selects the composite part;
creating a three dimensional object of a composite part from a three dimensional model of the composite part, wherein the three dimensional model includes controlled data and the three dimensional object excludes the controlled data;
displaying the three dimensional object to a requestor;
responsive to receiving the first user input, displaying a three dimensional object, wherein the three dimensional object allows the requestor to designate a location for the composite part but does not disclose controlled data to the requestor;
receiving a section user input selecting a location on the three dimensional object to form a selected location;
sending the selected location in a request to a server data processing system for the lay-up data; and
receiving the lay-up data for the composite part in response to sending the request, wherein the lay up data is configured to allow the requestor to perform maintenance on the composite part without accessing a three dimensional model of the composite part.

11. The method of claim 10, wherein the receiving step comprises:
receiving an output file having a stacking sequence, ply orientation, and materials for plies in a section around the selected location.

12. The method of claim 10, wherein the sending step comprises:
sending the selected location and a part number for the composite part in a request to the server data processing system for the lay-up data.

13. An apparatus comprising:
a client data processing system;
a server data processing system;
an application located on the data processing system, wherein the application creates a three dimensional object of a composite part from a three dimensional model of the composite part, wherein the three dimensional model includes controlled data and the three dimensional object excludes the controlled data; and displays the three dimensional object to a requestor;
a user application located on the client data processing system, wherein the user application displays a three dimensional object for a composite part, wherein the three dimensional object allows the requestor to designate a location for the composite part but does not disclose controlled data; and receives user input selecting a location to form location information on the composite part; and
a data extraction tool located on the server data processing system, wherein the data extraction tool receives the location on the composite part, extracts lay-up data for a section around the location from a three dimensional model containing the composite part to form extracted lay-up data, wherein the section comprises a cross-section of the composite part and the cross-section is generated substantially perpendicular to a surface of the composite part, and returns the extracted lay-up data to the client data processing system, wherein the extracted lay up data is configured to allow the requestor to perform maintenance on the composite part without accessing a three dimensional model of the composite part.

14. The apparatus of claim 13, wherein the server data processing system is located at a manufacturer facility and the client data processing system is located at a maintenance facility.

15. The apparatus of claim 13 further comprising:
a three dimensional model data base containing the three dimensional model.

16. The apparatus of claim 13, wherein the extracted lay-up data is returned in a document and wherein the extracted lay-up data comprises a ply stacking sequence, an orientation of each ply in the ply stacking sequence, and a material for the each ply in the ply stacking sequence.

17. The apparatus of claim 13, wherein the location information comprises an X coordinate, a Y coordinate, and a Z coordinate.

18. The apparatus of claim 13, wherein the location information also includes a part number for the composite part.

19. A computer program product for providing ply lay-up date for a composite part, the computer program product comprising:
a non-transitory computer readable media;
program code, stored on the non-transitory computer readable media, for creating a three dimensional object of a composite part from a three dimensional model of the composite part, wherein the three dimensional model includes controlled data and the three dimensional object excludes the controlled data;
program code, stored on the non-transitory computer readable media, for displaying the three dimensional object to a requestor;
program code, stored on the non-transitory computer readable media, for receiving a location on the composite part from the requestor;
program code, stored on the non-transitory computer readable media, for extracting the ply lay-up data for a section of the composite part within a three dimensional model containing the composite part to form extracted ply lay-up data, wherein the section comprises a cross-section of the composite part and the cross-section is generated substantially perpendicular to a surface of the composite part; and
program code, stored on the non-transitory computer readable media, for sending the extracted ply lay-up data to the requestor, wherein the extracted ply lay-up data is configured to allow the requestor to perform maintenance on the composite part without accessing a three dimensional model of the composite part and does not disclose controlled data to the requestor.

20. The computer program product of claim 19, wherein the program code, stored on the non-transitory computer readable media, for extracting ply lay-up data for the section of the composite part within the three dimensional model containing the composite part to form the extracted ply lay-up data comprises:
program code, stored on the non-transitory computer readable media, for identifying a set of sections from the location;
program code, stored on the non-transitory computer readable media, for forming a two dimensional drawing of plies in the section;
program code, stored on the non-transitory computer readable media, for associating ply orientation data with the plies; and
program code, stored on the non-transitory computer readable media, for associating material data with the plies.

21. The computer program product of claim 19 further comprising:
program code, stored on the non-transitory computer readable media, for displaying a three dimensional
object of the composite part to the requestor, wherein the three dimensional object allows the requestor to designate a location for the composite part but does not disclose controlled data to the requestor; and
program code, stored on the non-transitory computer readable media, for receiving a user input selecting the location on the composite part.

22. The computer implemented method of claim 6 wherein the controlled data includes information subject to export control laws.

23. The computer implemented method of claim 6 wherein the controlled data includes confidential information.