Document ID: chunk:federal_register_of_legislation:F2012C00535:front:0:p34
Version: federal_register_of_legislation:F2012C00535
Segment Type: other
Provision Reference: 
Character Range: 93054–96120

parts,

       4.2. data obtained from the tests and the resultant graphs,

       4.3. a statement of whether or not the requirement of paragraph 5.1. of this Regulation are met,

       4.4. identification of the vehicle type and the personnel responsible for the tests, the calculations, and the evaluation.

Annex 8 - Appendix 1

CHARACTERISTICS OF PLASTIC HINGES

1.              Characteristic curves

       The general form of a Plastic Zone (PZ) characteristic curve is a non-linear load-deformation relationship measured on structural parts of the vehicle in laboratory tests.
       Plastic Hinge characteristic curves are a bending moment (M) - rotational angle () relationship.  The general form of a PH characteristic curve is shown in Figure A.8. A.1.1

Figure A8. A1.1 - Characteristic curve for a plastic hinge

2. Aspects of deformation ranges

       2.1. The "measured range" of the PH characteristic curve is  the range of deformation over which measurements have been made.  The measured range may contain the fracture, and/or the rapid hardening range.  Only values of the PH characteristics which appear in the measured range shall be used in the calculation.

       2.2. The "working range" of the PH characteristic curve is the range covered by the calculation.

       The working range shall not exceed the measured range, and may contain the fracture, but not the rapid-hardening range.

       2.3. The PH characteristics to be used in the calculation shall contain the M- curve in the measured range.

3. Dynamic Characteristics

        There are two kinds of PH and PZ characteristics:  quasi-static and dynamic.  The dynamic characteristics of a PH may be determined in two ways:

       3.1. by dynamic impact testing of the component.

       3.2. by using a dynamic factor Kd to transform the quasi-static PH characteristics.
       This transformation means that  the values of the quasi-static bending moment may be increased by Kd.

           For steel structural elements Kd  =  1.2 may be used without laboratory test.

Figure A8.A1. 2 - Derivation of plastic hinge dynamic characteristics from the static curve

Annex 9

COMPUTER SIMULATION OF ROLLOVER TEST ON COMPLETE VEHICLE AS AN EQUIVALENT APPROVAL METHOD

       1. Additional data and information

       The superstructure may be shown to meet the requirements specified in paragraphs 5.1.1. and 5.1.2. of this Regulation by a computer simulation method approved by the technical service.
       if the manufacturer chooses this testing method, the following information shall be supplied to the technical service in addition to the data, and drawings listed in paragraph 3.2. of this Regulation;

       1.1. A description of the applied simulation and calculation method which has been utilised,  and clear precise identification of the analysis software, including at least, its producer, its commercial name, the version used and contact details of the developer.

       1.2. The material models and the input data utilized.

       1.3. The