bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Automatic Pulling Equipment of Radius Fillers
Authors: Shi Er Li , Duan Yue Xin , Yan Dong Xiu , Xu Shao Chen
Published: October 2015

Comparing to the preparation theory and automatic advantages of composite pultrusion process, a research on radius fillers’ automatic pulling equipment had been conducted. A certain width of prepregs were selected by radius fillers’ overall dimensions and performance requirements. Finally, qualified quality products were prepared continuously and stably by using the automatic pulling equipment. The equipment adopted measuring instruments, controller, actuators, operating panel and other automatic tools, forming a continuous and stable manufacturing process, meanwhile, achieved radius fillers’ automatic preparation and brought convenience to industrial application.
Performance Evaluation of a Paraboloidal Concentrator
Authors: Sookramoon Krissadang , Bunyawanichakul Pracha , Kongtrakool Bancha
Published: October 2015

This research aims are to design, build and analyze the performance of concentrated solar energy onto a simple calorimeter, made of copper and stainless steel. A scrapped yard antenna dish with a diameter of 1.68 meters was lined with aluminum foil reflector sheet. The average dish aperture area of 2.21 m2, the system uses water as a heat transfer fluid distributed from overhead tank. Absorbed energy was investigated at a water flow rate of 0.5 L/min were performed in the experiment and the maximum useful energy was determined. Parabolic dish concentrator displacement angle was adjusted in every 15 degrees per hour, with the used of electric controlled sun tracking system. The experimental tests carried out in Faculty of Industrial Technology, Vallaya Alongkorn Rajabhat University Pathum Thani, under Thailand climatic conditions (14.134°N, 100.611°E) during 2 selected days of the months April 2013. The performance of a paraboloidal concentrator was assessed using open-air experimental measurements including the incoming heat, the energy absorbed by the water, and the concentrator efficiency. The experimental results shown the maximum thermal efficiency was 89.73%. It was also found that copper calorimeter can simply attain during operation relatively high water temperature levels oncoming 97 °C. The concentrated solar flux at the focal point was 442,073.11W/m2 for stainless steel calorimeter and 619,448.66 W/m2 for copper calorimeter, respectively.
A Preliminary Study on the Preparation of Activated Carbon from Cyrtosperma chamissonis Petioles via Single Step H3PO4 Activation
Authors: Mohammed Yahya Muhammad Safwat Bin , Andas Jeyashelly , Zaidi Ab Ghani
Published: October 2015

In this study, highly porous activated carbon was prepared from Cyrtospermachamissonis petioles via single step H3PO4 activation. The effect of impregnation temperature (RT – 90 °C) on the yield, porosity and surface area was investigated. The synthesized activated carbons were characterized by Na2S2O3 volumetric method, SEM/EDX and N2 adsorption-desorption analyses. The optimization investigation clearly showed that the impregnation temperature affected on the yield and the specific surface area of the materials. Under the optimum impregnation temperature of 75 °C, the registered iodine number and BET surface area were 1129.23 mgg-1 and 1390.41 m2g-1 respectively with yield percentage of 35.82. This preliminary study proves the successful conversion of plant waste into value added porous materials.
Study of Different Biomaterials for Artificial Lumbar Disc Prosthesis Using FEM
Authors: Somovilla Gómez Fátima , Lostado Lorza Ruben , Corral Bobadilla Marina , López González Luis María , Gómez Cristobal José Antonio , Fernandez Martinez Roberto
Published: October 2015

The purpose of this study was to analyze the behavior of a lumbar spine disc prosthesis with different materials. The study was performed at L4-L5 lumbar motion segment using the finite element method (FEM). A healthy Finite Element (FE) model was used as a reference with which to compare the results of the FE simulations of the artificial discs. The healthy and the artificial FE models were subjected to a combination of 0.5 MPa Compression pre-load and 10Nm of Flexion moment. The artificial FE models were based on Maverick artificial disc, and the three materials proposed for study the artificial disk were Titanium, Ceramic and CrCoMo alloy. The most suitable material for developed the artificial disc was the CoCrMo alloy due to: The von Mises stresses on the bone with which this artificial disc was in contact were reduced as much as possible and also, were very similar to the von Mises stresses obtained in the bones from the healthy disc.
Eliminating of Far Pedicle Cortex Perforation by Automatic Spine Drilling
Authors: Boiadjiev Tony , Boiadjiev George , Delchev Kamen , Kastelov Rumen , Zagurski Kazimir
Published: October 2015

The need of the most precise manipulations in the orthopedic surgery concerns spine. The drilling takes place very often there. If spine cortices are broken by mistake then fatal problems appear as paralysis, block of breathing and death. Therefore in operation as pedicle drilling the far cortex perforation must be avoided. This paper shows that it can be done by bone drilling hand-hold robot ODRO. It is able to detect the bone far cortex and stops just before contact registration. Experimental results are presented. Also the results based on new algorithms and software are presented and discussed.
In Vitro Experimental and Numerical Analysis of Forces in Plane Cutting of Cortical Bone
Authors: Alam Khurshid , Muhammad Riaz , Silberschmidt Vadim V.
Published: October 2015

Bone cutting is a well know procedure in orthopedics. Large cutting force causes overstressing of the bone which may result in trauma. Control penetration of the cutting tool into bone tissue is important to avoid unnecessary damage to the bone tissue. The purpose of this study was to measure and predict cutting force using experiments and Finite Element (FE) analysis when a plane cutter passes over the bone surface in the presence of irrigation. The effect of cutting speed, tool rake angle, depth of cut and width of the cutting face on the cutting force was found. The force was found to decrease with increase in rake angle and significantly rise with increase in depth of cut and width of cutting face. The cutting force was found unaffected by the range of cutting speed used in experiment as well as in simulations. The results obtained from this study strongly recommend the use of irrigation to minimize plane cutting force or force arising from similar cutting action for safe and efficient surgical incision in bone.
The Stability Analysis of the Driving Rod of the Wind Tunnel Test Model Based on Workbench
Authors: Shao Zi Yan , Chen Wen Jia , Hu Yong Jin , Li Guan Jian
Published: October 2015

The ANSYS Workbench is used in this paper to analyse a kind of wind tunnel test model support platform with 5 degrees of freedom. The driving rod of the pitch motion is chosen as the main research project. By using static structural analysis, modal analysis and harmonic response analysis, a detailed analysis is made on the stress, deformation and frequency of the driving rod, and provides theoretical support for the future research on the stability of the institution.
Processing of Sustainable Polymer with Thermoplastics by Injection Moulding
Authors: Rus Anika Zafiah Mohd , Salim Nurul Syamimi M. , Idaris M.F.
Published: October 2015

Among different natural oils, recycling of waste vegetable oils from palm oil is widely explored for polyol synthesis to prevent pollution of waterways and clogging private and municipal drain systems, restaurants and other food preparation. The polyol is solidifying using cross linker and known as Sustainable Polymer (SP). SP is compounded with High-Density Polyethylene (HDPE) and Low-Density Polyethylene (LDPE) by melt-mixing using an injection molding machine. The effect of polymer compounding ratio on the mechanical properties was studied by tensile test. The result indicated that increasing the SP content in LDPE or HDPE was responsible to the reduction of tensile strength and elongation at break of the samples, if compared to pure thermoplastic LDPE and HDPE. This can be verified by increased in SP amount which gave a significant increase in density of the polymer compounds. Morphological of tensile specimens’ surface fracture is revealed the homogenous characteristic with high compatibility properties of sustainable polymer with its compounded polymers.
Application of Finite Element Methods for the Analysis of Restitution Coefficients for Golf Club Heads
Authors: Tai Ching Hui , Yin Chun Ho
Published: October 2015

Finite element methods are applied to investigate the coefficient of restitution (COR) for the head of a golf club. ANSYS commercial finite element software is first applied to determine the COR of two different disc-shaped titanium impact surfaces. These values were then experimentally verified to validate the accuracy of the finite element model. Finally, ANSYS was applied to determine the COR for club heads according to USGA specifications to confirm the reliability of the finite element model. The model is then validated by comparison with experimental results. The model can not only reduce time needed for product design and experimental testing, but can serve as a basis for follow-up studies on ball flight trajectory.
Impacts of Cooling Rates on Voids in Waxy Crude Oil under Quiescent Cooling Mode
Authors: Chala Girma T. , Sulaiman Shaharin Anwar , Japper-Jaafar Azuraien , Wan Abdullah Wan Ahmad Kamil
Published: October 2015

When waxy crude oil becomes a gel, predicting a restart pressure in pipelines has been a challenge. The formation of gas voids within the gel following sufficient cooling has an impact on the restarting pressure. This study is aimed at analyzing the effects of cooling rates on voids in waxy crude oil gel using Magnetic Resonace Imaging (MRI) technique. The flow loop rig simulating offshore oil production was designed. Waxy crude oil underwent cooling through the same temperature range to observe the effects of cooling rates on voids formed. Cooling rates were found to have different influence on the formation of voids. A maximum total voids volume of 6.96% was formed at cooling rate of 1.00°C/min. Cooling rate of 0.55°C/min produced a minimum voids volume of 5.74% near pipe wall. Higher cooling rates generally produced higher voids volume near pipe wall and in entire pipe. However, there was no definite trend observed for the voids around pipe core at which slower cooling rates were also observed forming higher voids volume.
Evaluation of Critical Speed of the Rotor Generator System Based on ANSYS
Authors: Sukma Nugraha Aditya , Djunaedi Imam , Alam Hilman Syaeful
Published: October 2015

Critical speed rotor phenomenon characteristics at gas turbine generator is evaluated using finite element method. In this study, the critical speed is evaluated based on the over speed of 4500 rpm. The critical speed of the rotor is investigated in the Campbell diagram, which shows the relationship between natural frequency and rotational velocity of the system Dynamic characteristic in this paper simulated with ANSYS rotor dynamic software. The Finite Element simulation results will be known forms of vibration at each critical speed. Finally the results od simulation can be a reference for dynamic analysis and optimized the design of rotor generator.
Analysis of a Hydrodynamic Spiral Grooved Upstream Pumping Face Seal Considering Cavitation
Authors: Liu Ding Hua , Zhang Bin , Zhao Juan , Ge Kai , Zhang Shun
Published: October 2015

A numerical analysis of an oil-lubricated spiral grooved upstream pumping face seal, accounting for the occurrence of cavitation, have been performed in this paper. The “equivalent flow model”, which is a theoretical scheme for taking the JFO boundary condition into hydrodynamic lubrication theory, was applied to the analyses by a finite difference treatment of the Reynolds equation that dealt with the geometry of logarithmic spiral groove. The calculated results were compared respectively based on Reynolds model and JFO model. The load capacity, cavitation ratio, frictional torque and leakage rate were also theoretically calculated. The difference between the theoretical results based on two boundary conditions for cavitation occurrence is considerable. The JFO boundary condition should be used in theoretical studies on sealing characteristics rather than Reynolds equation, especially in the conditions of less groove depth and high rotary speed.
Solving of the Regularized Inverse Problem for Elliptic Equations in Cylindrical Coordinates: Analytical Formulas
Authors: Mukanova Balgaisha , Maussumbekova Saule , Kulbay Magira
Published: October 2015

The continuation inverse problem for a solution to an elliptic equation in cylindrical layer for a model of stationary diffusion process is considered. Cauchy data are given on the outer boundary of the cylindrical layer; need to recover a field at the inner boundary of the cylinder. The problem is reduced to three different Cauchy problems for a second order ordinary differential equation. On the base of necessary minimization conditions of the residual functional analytical formulas for a regularized quasisolution to the inverse problem are derived.
Roller Screw Mechanism for Converting Rotational Motion into Linear Motion
Authors: Morozov Valentin , Panyuhin Vadim , Zhdanov Aleksey V.
Published: October 2015

We examine the method to determinate the kinematic characteristics of the RSM, Classification of mechanisms of this class to convert rotational motion into linear motion is introduced. At the same time, we have developed some formulas to determinate the kinematic transfer functions of the RSM of different types depending on the geometrical parameters of this kind of screw mechanism.
Experimental Study on a Novel Evaporative Cooling System Using Ejector and Membrane Dehumidification Module
Authors: He Si Yuan
Published: October 2015

A novel evaporative cooling system, which uses an ejector for refrigeration, integrated with a membrane dehumidification module has been studied. In the system investigated, where ultrasonic nebulizers are utilized to pulverize water into droplets for evaporation. The cooling effect influenced by the intensity of ultrasonic automization has been experimentally studied. The prototype of the membrane module is made and several experiments are conducted to evaluate its effect on the system. It is found that, in a permanent inlet air condition, the temperature drop would increase as intensity of ultrasonic grows. Cooling effect of the ejector is better in dry ambient condition compared to moist one. When in the humid environment, the membrane module would increase the system refrigeration capacity by 80%.
Research on the Law of Thermal Effect of Floating Nuclear Power Plants Thermal Discharge
Authors: Dai Tian Qi , Yao Shi Wei , Wei Zhi Guo
Published: October 2015

The waste heat emissions of thermal discharge from floating nuclear power plants may have a negative thermal effect on the environment. Study on the dilution and diffusion of cooling water plays an important role in thermal pollution prevention. The cooling water discharge process can be condensed into the thermal jet in cross flow. According to the theory of computational fluid dynamics, the mathematical model of round horizontal thermal jets in cross flow is established. The 3D numerical simulation of thermal jets based on finite volume method is achieved by using the Realizable k-ε turbulence model and the Semi-implicit method for pressure linked equations, and the three-dimensional trajectory of thermal jet are obtained. The rationality of analysis method is approved by comparing calculation value with experimental value. The temperature distributions in thermal jets are studied through the numerical experiments conducted under different cross-flow velocity and different emission angle. As a result, the impacts of these conditions on thermal pollution area are found, and the theoretic bases are provided for the design of the cooling water discharge pipe.
Numerical Simulation on Solidification of Flow inside an Elliptical Pipe
Authors: Li Lan , Ma Huan , Si Feng Qi , Zhu Kang Ping
Published: October 2015

The aim of this investigation is to study the characteristics of solidification of flow through an elliptical pipe and to avoid the solidification and blockage in the pipe. A three-dimensional model has been completed using the commercial fluid dynamics code, Fluent. Analyses under different conditions show that different factors affect the characteristics of solidification and heat transfer in the pipe. The lower Reynolds number is or the higher dimensionless wall temperature turns, the thicker the ice layer becomes, which will increase the risk of blockage. The thickness at the long axis direction will grow with the increase of ellipse aspect ratio while it turns out contrary at short axis direction.
The Experiment on System Performance Comparing Analysis and Displacement between R1270 and R22
Authors: Wu Zhi Jiang
Published: October 2015

The refrigeration circle performance of air conditioning comparing analysis and displacement between R1270 and R22 is studied in this paper. In addition, the system performance optimization of R1270 refrigeration circle is discussed.The experimental results show that the smaller tube diameter of heat exchanger for R1270 system is easy to improve the energy efficiency ratio in the unimproved system.These results are important for theory and reality to research this type of air conditioning.
Effects of Adhesive Bond on Active Repair of Aluminium Plate Using Piezoelectric Patch
Authors: Abuzaid Ahmed , Dawood Mohamed Shaik , Hrairi Meftah
Published: October 2015

Research activities on active repairs and stress control of structures using piezoelectric actuators and adhesive bond have received much attention in recent years. The function of the adhesive bond on active repair is to transmit the induced stresses by the piezoelectric actuator to the host structure in order to reduce the stress intensity on the crack front. Assessment of repair performance of adhesive bonds is done based on the transfer of the shear and peel stress concentration in the adhesive layer. In the present work, three dimensional finite element analyses have been carried to understand the effects of adhesive properties on active repair performance of a cracked aluminium plate under mode I. Adhesive efficiency is evaluated by the stress intensity factor (SIF) as a fracture criterion. The results show that SIF varies inversely with the adhesive layer’s shear modulus.
Optimization of Flexural Strength and Thermal Conductivity of Mortar Reinforced with Alfa Fibers
Authors: Jaballi Sebti , Miraoui Imed , Hassis Hedi
Published: October 2015

This paper focuses on the optimization of flexural strength and thermal conductivity of mortar reinforced with Alfa fibers. Fibers were manually extracted from Alfa leafs to avoid the risk of degradation of mechanical properties. A first group of samples (300 x 300 x 30 mm) having a fiber volume fraction of 0.5 to 1.5% is prepared to measure the thermal conductivity.The second composite family (40 x 40 x 160 mm) cured in a wet chamber is used for measuring its bending strength. The fiber percentage varies from 0.74 to 1,85%.The results show that the thermal conductivity decreases by increasing the fiber content. While the optimal percentage of fiber for the flexural strength is estimated at 1%, corresponding to an increase of 27% in strength.
3 DOF Lumped Mass Tracked Vehicle Model
Authors: Özdemir Mehmet Nuri , Kılıç Varlık
Published: October 2015

A 3 DOF lumped mass tracked vehicle model was constructed in Matlab Simulink Environment and used for positioning the vehicle on gradients and missile firing operations. Pitch center, roll center and system parameters such as equivalent stiffness values, equivalent damping values and equivalent mass/inertias of 3 DOF model were obtained from 32+ degrees of freedom tracked vehicle model by simulations. Moments in pitch and roll directions were applied to the vehicle to find the pitch and roll centers. A range of step forces in bounce direction and a range of step moments in pitch and roll directions were applied to the vehicle and responses in the related directions of 32+ degrees of freedom model were used to determine the system parameters of 3-DOF model. Finally attitude of the vehicle on the gradients and missile firing scenario were simulated with both models and the results showed that 3 DOF model reasonably predicts the behavior of the tracked vehicle.
Analysis of the Energy Absorption Capacity of Vehicle Front Components in Crash
Authors: Zhang Zi Peng , Lin Chiu Wen , Teng Tso Liang , Hsu Ching Yu , Liang Cho Chung , Wang Yang , Shih Chien Jong
Published: October 2015

Front crash has high probability in tranfic accident, and the front energy absorption part plays a very important role during the crash and is the key point to protect the safety of the occupant. The whole vehicle front crash is simulated in software LS-DYNA. This paper fix out the key steps and parameters in FEMB, and make good advise for finite anlysis. Finite anlysis is used in this paper to study motionstate of the vehicle and the energy absorption. Due to the anlysis, we find out that the front longitudinal beam is the most important component in the crash.
Duty Control Effect during Crankcase Flow in Automobile ECV at its Crankcase Pressure Port
Authors: Mahmud Md. Iqbal , Cho Haeng Muk , Seo Hyun Sang , Hai Wang Wen , Sarker Konica
Published: October 2015

Electromagnetic control valve; widely known as ECV, is one of the important components used in variable displacement type compressor for air conditioning control system. It controls the compressor operation on the basis of pulse width modulation (PWM) technique that used to encode the information for transmission. PWM technique allows the control of the power supplied from an external controller to the electrical devices, especially to inertial loads. Different pressure ports in ECV, basically acts as the connecting passages through the ECV for air/refrigerant flow functions. Supply of current and duty control is an important issue that highly concerns to the crankcase flow (Pc flow) through the crankcase pressure port of the ECV. In this research paper, effect of duty control is investigated during the Pc flow at the crankcase pressure port of ECV.
Comprehensive Analysis Method for Water Inrush Source in Fracture-Pore Gas Reservoirs with Bottom Water: A Case from M Gas Reservoir
Authors: Yao Yuan , Guo Chun Qiu , Zhang Yun Xin , Zhong Hai Quan
Published: October 2015

During the development of M gas reservoir which is a typical fracture-pore carbonate reservoir with bottom water, excessive water production is frequently encountered during the lifetime of gas-producing wells, which generally results in a rapid productivity decline and a remarkable increase in operating costs caused by the handing and treating of large amount of water. Nevertheless, there exists no comprehensive analysis method to accurately obtain it. In combination with previous studies about water inrush source in gas reservoirs and the static and dynamic developing data of M gas reservoir, there are four methods brought up firstly, which are means of water sample salinity analysis, water-gas ratio (WGR) analysis, comprehensive logging interpretation analysis and production performance analysis. Subsequently on the basis of formation parameters and fluid data of M gas reservoir, the mechanism model of fracture-pore reservoir with bottom water have been set up by utilizing the Eclipse software to research the water-invasion principles. According to the dynamic change characteristics of water invasion, the numerical simulation analysis method has been brought up. Finally the identification process is illustrated accurately by taking two representative wells in M gas reservoir for example. A timely and precise identification of water inrush source plays a significant role in understanding the principles of gas-water motion in the reservoir, making corresponding and reasonable development measures and improving the development efficiency.
Spark Plug with Integrated Chamber
Authors: Dittrich Aleš , Beroun Stanislav , Brabec Pavel , Mikulanin Lukáš
Published: October 2015

Spark plug with integrated chamber increases the quality of ignition of homogenous mixture in the engine cylinder. Very small amount of burning mixture bursts (outflows) from chamber (so-called flame jet ignition) which heads into faster initial phase of burning. From view of cycle to cycle variations the procedure of consequent burning is more stable. Spark plug’s case with integrated chamber is exposed by higher thermal stress than classis spark plug. This fact has to be respected during design of spark plug with integrated chamber. This article shows the how configuration of the lower part of spark plug with integrated chamber can change the type of spark and how flame-jet ignition will affect parameters of burning mixture during operating cycle.
Measure Device for Injector inside the High Pressure Environment with Use of High Speed Camera
Authors: Starý Petr , Mikulanin Lukáš , Scholz Celestýn
Published: October 2015

This article is focused on the problematics of high-pressure fuel injectors of Common Rail system which are inside of high pressure environment. Those injectors are able to measure cycle's amount of fuels and visualization of fuel ray disintegration during outflow into high pressure environment. Article is primarily focused into a construction of pressure testing chamber which will be functional extension for high pressure systems testing device. Monitoring of measured parameters will have positive influence during designing of constructing changes on the injection unit.
Numerical Modeling of Gasdynamic Processes and Processes of Deformation in Compressor of Model Test Bench of the Gas-Distributing Unit
Authors: Modorskiy Vladimir Yakovlevich , Shmakov Arthur Fadanisovich
Published: October 2015

In this work results of numerical modeling of the gasdynamic processes and processes of deformation proceeding in the compressor of the model test bench of the gas-distributing unit are provided. Fields of pressure and temperatures, and also component of the stress-strain state structure taking into account the imported gasdynamic and heat loads are received. A good agreement with data of physical experiments is received.
Propulsive Modeling for TF-30 and JT9D-3 Turbofan Engines of Transport Aircraft by Using Genetic Algorithms and Neural Networks
Authors: Baklacioglu Tolga
Published: October 2015

Not only for aircraft performance calculations and trajectory predictions but also for air traffic management simulation tools and operational equipment, accomplishment of an accurate propulsive model for transport aircraft has a crucial priority and is a remarkable topic for aircraft industry. In the literature, there are very few propulsive modeling studies; furthermore, the demand for an accurate thrust model still remains unfulfilled. In this study, a new turbofan engine propulsive model determining the relationship between thrust, flight altitude, and Mach number was developed by using genetic algorithms (GAs) method and multilayer feed-forward neural networks (FNNs) utilizing Levenberg-Marquardt (LM), delta-bar-delta (DBD), and conjugate gradient (CG) learning algorithms. Estimated thrust values by the derived models showed a good fitting with actual thrust data for both models, which validated each model’s accuracy.
Application of Bond-Graph Method in Microjet Engine Cold Start Modeling to Investigate the Idea of Injecting Compressed Air
Authors: Montazeri-Gh Morteza , Miran-F Seyed Alireza
Published: October 2015

This paper presents the application of bond-graph modeling for investigation of the microjet engine in cold starting mode. In this model, the idea of simultaneous usage of the compressed air and electric starter is developed to perform the starting process. For this purpose, the microjet engine is assembled by components which is provided by the engine manufacturer, then a monitoring system in Labview software is developed. Dynamic modeling of the engine cold starting phase is performed by bond graph approach and simulated in 20-sim software. So, the allowable air pressure to inject during the starting process is calculated. The simulation results are then compared with experimental data where a good agreement is observed. These results support the proposed model for further analysis to improve the performance of engine start-up process.
Simulation Study on Electric Turbo-Compound (ETC) for Thermal Energy Recovery in Turbocharged Internal Combustion Engine
Authors: Mohd Noor Alias , Che Puteh Rosnizam , Rajoo Srithar , Basheer Uday M. , Md Sah Muhammad Hanafi , Shaikh Salleh Sheikh Hussain
Published: October 2015

Exhaust gas heat utilization in the form of Thermal Energy Recovery (TER) has attracted a major interest due to its potentials with Internal Combustion Engines (ICE). Recovering useful energy, for example in the form of electrical power from the engine exhaust waste heat could benefit in the form of direct fuel economy or increase in the available electric power for the auxillary systems. The methodology in this paper includes the assessment of each waste heat recovery technology based on the current research and development trends for automotive application. It also looked into the potential for energy recovery, performances of each technology and factors affecting its implementation. Finally, the work presents an Electric Turbo Compounding (ETC) simulation using a Ford Eco-Boost as a baseline engine modeled with the 1-Dimensional AVL Boost software. A validated 1-D engine model was used to investigate the impact on the Brake Specific Fuel Consumption (BSFC) and Brake Mean Effective Pressure (BMEP) at full load. This paper presents some reviews on the turbo-compounding method and also the modelling efforts and results of an electric turbo-compounding system. Modelling shows that the turbo-compounding setup can be more beneficial than turbo-charging alone.
Detection of Sodium Ions by SPR Sensor Using Modified Self-Assembled Calix[4]Arene Deravative Monolayer
Authors: Benounis M. , Jaffrezic-Renault Nicole , Bonnamour Isabelle , Messai Nadhir
Published: October 2015

A new SPR sensor surface based onself-assembled-Calix [4] arene-derivative-monolayer was proposed for the detection of sodium in water. The immobisation of claixarene onto the gold surface was confirmed by impedance spectroscopy (EIS). Three alkaliions were used K+, Na+ and Ca2+ and the influence of pH on ions detection was studied and optimized. The Calix [4] arene-gold SPR sensor developed was characterized by low limit of detection (LOD) for about 10-10 M, high sensitivity and wide linear detection range between 10-6M and 10-14M.
Classification of Selected Essential Oil from Family Zingiberaceae Using E-Nose and Discriminant Factorial Analysis (DFA) Techniques: An Initial Study
Authors: Lias Sahrim , Mohamad Ali Nor Azah , Jamil Mailina , Aziz Azrina , Ghani Siti Humeirah Ab , Patah Mohammad Faridz Zoll
Published: October 2015

Essential oils are very valuable natural resources and considered as secondary metabolites. They are produced from several parts of aromatic plant by using different type of extraction techniques. Each technique produced slightly different output oil yield and smell however they produced the same major chemicals compound markers when they are analysed using chemical analysis and profiling technique. Pure essential oils are known to have very strong odor and there are several techniques used to differentiate the volatile odor generated. In this study, Electronic Nose (E-Nose) technology is used to distinguish the smell among 8 samples selected within the same Zingiberaceae family. Their pattern recognition profiles were examined by statistical analysis using Discriminant Factorial Analysis (DFA). The result shows that the E-Nose technology combined with DFA were successfully discriminating all 8 samples within the same family with significant p-values < 0.05 across all samples and 100% recognition value.
Tomography Observation of Fiber Reinforced Composites after Fatigue Testing
Authors: Bale Jefri , Valot Emmanuel , Monin Martine , Polit Olivier , Bathias Claude , Soemardi Tresna
Published: October 2015

This work presented an experimental study to observe the inside conditions and damage appearances of fiber reinforced composites material by non destructive testing (NDT) method. In order to achieve this, an open hole specimen of unidirectional glass fiber composite (GFRP) and discontinuous carbon fiber composite (DCFC) had been using as the specimen test under tensile fatigue loading and observed using post failure monitoring techniques of NDT namely computed tomography (CT) scan. The results shown that the tomography observation based on segmentation method of gray value gives a good detection on early damage appearances before final failure of GFRP and DCFC after tensile fatigue loading conditions.
Construction of the Measuring Device for Analyzing the Internal Combustion Engine Torque
Authors: Popelka Josef , Mikulanin Lukáš , Scholz Celestýn
Published: October 2015

This article can be divided into two parts when first one is focused on essential analyse of torque measuring problematic while second one is focused on design and construction of own measuring device. Goals of this article are to specify each variation of measuring and chose the best one for desired requirements. Designed measuring device will be used for torque analyse in the dissertation.
Intelligent Diagnostic of Induction Machine for Faults Detection and Classification Using Wavelet and Fuzzy Inference
Authors: Bourdim Samia , Hemsas Kamel Eddine , Harbouche Youcef , Abdssemed Rachid
Published: October 2015

An intelligent diagnostic method based on 3-D plot continuous wavelet transform (3-D plot CWT) and fuzzy inference system is presented to investigate the detectability and classification of rotor broken bars faults in induction machine (IM) and to overcome the limitation of classical Fourier Transform (FT). This approach is successfully used with Motor Current Signature Analysis (MCSA) and suitable developed model of IM in healthy and faulty mode using Matlab environment. As first step we performed new results using 3-D plot CWT to extract the discriminating features. The features extracted from the wavelet transformed signal are the second most predominant frequency, the time range at which it occurs and the corresponding wavelet coefficients .Then as second and last step a fuzzy Inference system is designed and implemented using Matlab software with these three features extracted from the wavelet transformed signal as inputs and generates an output that classifies the fault and no fault conditions. It is observed that the results are satisfactory.
Multi-Fault Diagnosis of Rotating Machinery Based on Spatially Constrained ICA
Authors: Yu Gang , Hu Chao
Published: October 2015

Most conventional methods cannot get effective performance during multi-fault diagnosis of rotating machines. Blind source separate techniques have applied to this problem, but the results show some limitations. Some prior knowledge considering the spatial or temporal characteristics of signals can be incorporated into these BSS approaches. Here spatial topography information will be chosen as spatial constraints and combine them with FastICA algorithm to get spatially constrained ICA (SCICA) method. This new technique will deal with multi-fault signals of rotating machinery through simulation process. SCICA is effective to multi-fault diagnosis and can separate all the source signals.
Fabrication and Properties Study of the Dielectric Membranes Used as Constructive Basis for Sensitive Elements of Gas Sensors
Authors: Veselov Denis
Published: October 2015

The article presents the properties study results of the dielectric membranes for sensitive elements of semiconductor gas sensors, obtained by different modes of the reactive magnetron sputtering of silicon with application of the two-stage unilateral anisotropic etching of silicon in the organic alkaline solutions. The qualitative analysis of the membranes stability to destructions and deformations in the course of their fabrication and heating is given. Optimum structures and modes of films formation for dielectric membrane structures are determined. The admissible thickness of the thermal silicon oxide underlay, which is does not promote to considerable membranes deformations in the course of their fabrication and heating, is identified.
Diagnostics of Aluminum Alloys Melting Temperature in High Pressure Casting
Authors: Dubják Ján , Piteľ Ján , Tóthová Mária
Published: October 2015

The high pressure casting process is a well-established way for the manufacture of non-ferrous components. Temperature is important technological parameter of production that affects the structure and quality of castings. Using continual exact measurement of alloy temperature is the best approach for predicting structures quality problems.Temperature measurement system also would help to acquire feedback from the manufacturing process so as to prevent possible defects in next phases of manufacturing. For this measurement we used thermocouple type „K“ in protective tube from graphite. It is necessary for correct process to know true values of temperature. For diagnostics we used procedures of SPC (StatisticalProcess Control) and Microsoft Excel 2007 graphic tools.
Creation of Mathematical Prescription of Residual Stress Depending on Various Cutting Conditions
Authors: Hutyrová Zuzana , Makiela Włodzimierz , Michalik Peter , Mitaľ Dušan , Radchenko Svetlana , Duplák Ján , Czán Andrej
Published: October 2015

Article deals with problematic of internal residual stress after machining depends on various cutting condition. In article is presented influenced of cutting conditions to quality of internal layers by defining values of residual stresses. Method use to evaluate values of residual stress was RTG diffraction. Material used for experiment was steel C45 and type of machining was up milling for various parameters such as spindle speed, feed rate and depth of cut.
Vibration and Experimental Comparison of Machining Process
Authors: Panda Anton , Prislupčák Marek , Jurko Jozef , Pandová Iveta , Orendáč Peter
Published: October 2015

Abrasive water jet technology is among the unconventional ways of machining. In today's modern and progressive era is often used for cutting and machining of various types of materials because of lower costs and environmental impact, as the cutting tool is water, in our case, with the addition of abrasives. Objective of the measurements was to evaluate the impact of vibration on the technological head in abrasive water jet technology in changing the selected technological parameters and the flow rate of technological head. In the given experiment, the used material - steel Hardox 500 with a thickness of 10 mm. The effort was to investigate the effects of changes in the speed rate of technological head (by speeds - 40, 200, 400 mm / min) on the size of the vibration acceleration amplitude and its frequency. Based on the measured values ​​of vibration to the technological head create the database and from it is evaluated the data in selected softwares (LabVIEW, SignalExpress and Microsoft Excel). Findings and conclusions are formulated on the basis of graphical dependencies, envelopes frequency spectra and comparison chart of envelopes.
Observation of Impact of Progressive Cooling System on Temperature Field Distributions on Surfaces of Injection Moulded Plastic Parts
Authors: Seidl Martin , Bobek Jiří , Lenfeld Petr , Habr Jiří , Bĕhálek Luboš , Nováková Iva
Published: October 2015

Cooling the injection moulds with using of liquid CO2 is rated among progressive and innovative tempering systems nowadays. In the ideal case this cooling method is chosen in combination with conventional drilled or milled tempering channels where the heat transfer medium flows. These wide-spread ways of cooling are not very often effective enough and they do not provide required accuracy of heat transfer control during production by injection moulding technology. Implementation of capillary tubes that bring the liquid CO2 to critical zones enables local increasing of heat transfer. Regulation of liquid CO2 amount that is injected into mould enables removal of required heat quantity in a very short time period. In this way the homogenous rate of part cooling can be achieved which is very difficult when producing the parts with complex geometry or with combination of various wall thickness. The final mechanical and physical properties of moulded parts accrue from properties of polymer material, part design and used technological parameters. This article deals with evaluation of technological parameters, concretely the cooling parameters of both the conventional cooling method and the system utilizing the cooling potential of liquid CO2. The analysis is focused on observation of temperature field distribution on injected part surfaces.
Comparison and Analysis of the Flow Rate
Authors: Prislupčák Marek , Panda Anton
Published: October 2015

Separation of materials is a fundamental technology for the production of machine parts. Division is involved in the overall use of the material and also impact on the overall production time. With the development of new materials increasing requirements for the construction, design and durability. This makes the development of new materials with higher mechanical, physical and chemical properties. These materials are difficult to machine, and this gives rise to the development of non-conventional technologies, which include water jet technology.
Measurement and Analysis of Mass Flow and Feed Speed Impact on Technological Head Vibrations during Cutting Abrasion Resistant Steels with Abrasive Water Jet Technology
Authors: Salokyová Štefánia
Published: October 2015

The article presents the results of Technical University in Košice Faculty of Manufacturing Technologies Department of production processes operation and Technical University in Ostrava Physics Institute Liquid jet workplace cooperation in the area of operational states diagnosis of manufacturing systems with abrasive water jet technology (AWJ). Within the operational states diagnostics is the impact of selected technological parameters on technological head vibrations studied. Based on an extensive set of experiments are original graphical dependences determined of the abrasive mass flow and feed speed impact on the vibrations parameter - technological head vibrations acceleration amplitude of manufacturing system with AWJ technology. In addition to the original graphical dependences are in article new knowledge formulated in the area of science and research and recommendations for companies that operates manufacturing systems with AWJ technology.
Elimination of Pressure Cylinder Deflection on Two Cylinder Bending Machine
Authors: Vitikáč Batešková Eva , Panda Anton
Published: October 2015

The modern world of mechanical and electrical engineering disposes of a very high amount of appliances and devices for measuring the values of various parametres. When designing a device for measuring the deflection of a roller in a two cylinder bending machine, the measured parameter of the deflection can deviate by several dozen micrometres either side of zero. Therefore, it is necessary to design a measuring appliance or device with the sensitivity to measure this error of measurement within these limits. Similarly, we have to consider the fact that the device of the bending machine is already produced as an individual machine and the design of the device for measuring the deflection will be part of its superstructure.
Formation and Spreading of Cracks at Die due to Heat Fatigue
Authors: Ružbarský Juraj
Published: October 2015

The moment of formation and spread of cracks on the surface of metal mould cavity is rather significant in the sphere of die casting due to durability of these costly tools and especially in case of casting of metals and alloys with higher melting temperature. The issue examination requires analysis of the thermal aspect of the process and of the mechanism of mechanical stress occurrence of material.For the purpose of verification of occurrence and spread of cracks the fragile materials were firstly tested in case of which inevitable number of cycles was possible to be considered acceptable for testing performance. The first tests were accompanied by the ring dipping with diameter of 60 mm with the central hole with diameter of 15 mm from alloy according STN 42 2420 standard, i.e. with dimensions reaching the used mould filler into molten salt at temperature of 1000°C for the period of 30 s with following dipping into water (20°C). The sample surface checking was performed visually after every 100 cycles.To make a comparison the dependence of length of cracks with circular samples with diameter of 12.7 mm made of material H11, H13, H21 and of steel Maraging.
Bearing Rings Turning and the Impact of this Process for Resulting Durability of Selected Cutting Materials Durability
Authors: Panda Anton , Duplák Ján , Kormoš Miroslav , Jurko Slavko
Published: October 2015

Essential factors of each new discovery or piece of knowledge in science are predetermined, prepared and realized experiment. Every successfully realized experiment with obtained outputs and measurements indicates the gauge of asset that has been achieved by its execution. After analyzing of outputs final dependencies can be described that generalize whole experiment and allow entire process to be analytically identified. The production of bearings is very difficult process. Especially production of bearing rings is very complicated. Optimization of this process means significant savings for the company. Bearing rings are produced by turning. One of the most important parts of the turning process is cutting tool. On the base of cutting tools are determined many factors for example: quality, price, cutting speed, etc. All these factors of cutting tools are the only consequence of these cutting tools durability. Cutting tool durability determines its cutting properties and machinable ability. Specification of tool wear by means of calculation is very difficult. Durability of cutting tools is defined in standard ISO 3685. In standard ISO 3685 is definedT-vcdependence for different cutting materials and standard included process evaluation of tool durability for cutting materials made of high speed steel, sintered carbide and cutting ceramic. The article describes evaluation ofT-vcdependence on the selected type of cutting materials and theirs comparison with measured values T-vc dependence that are defined in standard ISO 3685.
Impact of Cutting Speed on the Resultant Durability of Cutting Tool in Machining Process of Steel C45
Authors: Duplák Ján , Zajac Jozef , Hutyrová Zuzana , Kormoš Miroslav , Czán Andrej , Kaczmarska Bożena
Published: October 2015

Precision machining is currently intensively studied. Production of quality products fast, and precise with paying attention on environmental issues, brings many factors which counteracts to ensure these aspects. Is very crucial to know system machine – tool – workpiece and is necessary to characterize all elements and limitations connected with this system. Choice of suitable cutting tools is very important part of production process. Acquisition cost of tools in serial production is only below 10 % but in medium production can be up to 50 % of production cost. Know the characteristic of the tool is very important to ensure effective machining process and economic stability of whole production process. The article is focused on clarification of basic indicators, which should be used to more effective and more economical handling with cutting tools.