Space Frame Analysis, Design, and Testing for Electric Vehicle Formula

2014 ◽  
Vol 619 ◽  
pp. 183-187 ◽  
Author(s):  
Thanyarat Singhanart ◽  
Thammongkol Sangmanacharoen ◽  
Wasin Tocharoen ◽  
Phongpakkan Danwibun
Keyword(s):  
Electric Vehicle ◽  
Torsional Stiffness ◽  
Steel Tubes ◽  
Space Frame ◽  
Element Analysis ◽  
Electric Car ◽  
Torsional Test ◽  
Analysis Design ◽  
Design And Testing ◽  
Engine Type

The objective of this paper is to design, analyze, and test the space frame for electric vehicle with comparison to the engine type. Therefore, in order to design the electric vehicle formula, the same requirements with some changes are considered. The space frame is designed to suit with the electric vehicle and then finite element analysis is used to determine the torsional stiffness of the frame which is verified by the torsional test. Initially, the required torsional stiffness for the electric car is 1350 Nm/deg and the mass is set to be not more than 40 kg. The numerical results and the experimental results for torsional stiffness are 960 Nm/deg and 1218 Nm/deg, respectively. Therefore, the torsional stiffness is about 25% under-predicted; anyway it can be used to predict the torsional stiffness of the frame. Due to some changes must be performed, therefore the modified frame is re-analyzed with the torsional stiffness of 1389 Nm/deg which is less than the revised required car’s torsional stiffness of 1404 Nm/deg. Anyway, the torsional stiffness of frame with battery’s case can meet the requirement. The mass of the modified frame is 50 kg which is larger than required mass due to selected sizes of steel tubes. In conclusion, the space frame can be designed and the mass can be improved further by reducing the sizes.

scholarly journals Analysis, Design, and Testing of a Low Profile Deflection Pad™ Thrust Bearing in an Industrial Gas Turbine

1994 ◽  
Author(s):  
Dilip Jain ◽  
Fouad Zeidan ◽  
Michael Wittmeyer
Keyword(s):  
Gas Turbine ◽  
Thrust Bearing ◽  
Element Analysis ◽  
Low Profile ◽  
Wide Range ◽  
Analysis Design ◽  
Thrust Pad ◽  
Industrial Gas Turbine ◽  
Design And Testing ◽  
Thrust Load

This paper describes the analysis, design, and testing of a low profile thrust bearing in a DR 990 industrial gas turbine. High unit loads and speeds, and the need to maintain low frictional power loss presented many challenges. The thrust pad design utilizes a flexure pivot, which allow near optimum performance for a wide range of speeds and loads in comparison to a fixed geometry taper land design. The use of high conductivity material for the thrust pads and directed lubrication allowed operation at lower temperatures. Finite element analysis was used to model the pad structure and pivot support. This analysis was confirmed by measuring the pad tilt using an eddy current probe. The test was conducted in a controlled thrust rig allowing accurate application and measurement of the thrust load. Precision manufacturing of the spherical seat and the application of a proprietary coating allowed better aligning capability under load. The bearing was tested in an engine at a range of speeds and loading conditions. The results are presented and compared with the existing fixed geometry bearing design. The bearing is currently running in an engine in the field and has accumulated 2,400 hours of operation with no forced outages.

Torsional Analysis of a Steel Cord-Rubber Tire Belt Structure

1996 ◽  
Vol 24 (4) ◽  
pp. 339-348 ◽  
Author(s):  
R. M. V. Pidaparti
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Composite Structures ◽  
Three Dimensional ◽  
Element Model ◽  
Torsional Stiffness ◽  
Element Analysis ◽  
Rubber Belt ◽  
Steel Cord ◽  
Torsional Analysis

Abstract A three-dimensional (3D) beam finite element model was developed to investigate the torsional stiffness of a twisted steel-reinforced cord-rubber belt structure. The present 3D beam element takes into account the coupled extension, bending, and twisting deformations characteristic of the complex behavior of cord-rubber composite structures. The extension-twisting coupling due to the twisted nature of the cords was also considered in the finite element model. The results of torsional stiffness obtained from the finite element analysis for twisted cords and the two-ply steel cord-rubber belt structure are compared to the experimental data and other alternate solutions available in the literature. The effects of cord orientation, anisotropy, and rubber core surrounding the twisted cords on the torsional stiffness properties are presented and discussed.

A PARADIGM SHIFT FOR TORSIONAL STIFFNESS OF NICKEL-TITANIUM ROTARY INSTRUMENTS: A FINITE ELEMENT ANALYSIS.

2021 ◽  
Author(s):  
Zanza Alessio ◽  
Seracchiani Marco ◽  
Di Nardo Dario ◽  
Reda Rodolfo ◽  
Gambarini Gianluca ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Paradigm Shift ◽  
Nickel Titanium ◽  
Torsional Stiffness ◽  
Element Analysis ◽  
Rotary Instruments

scholarly journals Design and analysis of concrete-filled tubular flange girders under combined loading

2021 ◽  
pp. 136943322110015
Author(s):  
Rana Al-Dujele ◽  
Katherine Ann Cashell
Keyword(s):  
Finite Element ◽  
Axial Force ◽  
Failure Modes ◽  
Numerical Study ◽  
Combined Loading ◽  
Torsional Stiffness ◽  
Fe Model ◽  
Combined Effects ◽  
Element Analysis ◽  
Hollow Section

This paper is concerned with the behaviour of concrete-filled tubular flange girders (CFTFGs) under the combination of bending and tensile axial force. CFTFG is a relatively new structural solution comprising a steel beam in which the compression flange plate is replaced with a concrete-filled hollow section to create an efficient and effective load-carrying solution. These members have very high torsional stiffness and lateral torsional buckling strength in comparison with conventional steel I-girders of similar depth, width and steel weight and are there-fore capable of carrying very heavy loads over long spans. Current design codes do not explicitly include guidance for the design of these members, which are asymmetric in nature under the combined effects of tension and bending. The current paper presents a numerical study into the behaviour of CFTFGs under the combined effects of positive bending and axial tension. The study includes different loading combinations and the associated failure modes are identified and discussed. To facilitate this study, a finite element (FE) model is developed using the ABAQUS software which is capable of capturing both the geometric and material nonlinearities of the behaviour. Based on the results of finite element analysis, the moment–axial force interaction relationship is presented and a simplified equation is proposed for the design of CFTFGs under combined bending and tensile axial force.

scholarly journals Validation of Welding Simulations Using Thermal Strains Measured with DIC

2011 ◽  
Vol 70 ◽  
pp. 129-134 ◽  
Author(s):  
Maarten De Strycker ◽  
Pascal Lava ◽  
Wim Van Paepegem ◽  
Luc Schueremans ◽  
Dimitri Debruyne
Keyword(s):  
Residual Stresses ◽  
Cross Section ◽  
Circular Cross Section ◽  
Welding Process ◽  
Weld Bead ◽  
Image Correlation ◽  
Steel Tubes ◽  
Element Analysis ◽  
Strain Evolution ◽  
The Cross

Residual stresses can affect the performance of steel tubes in many ways and as a result their magnitude and distribution is of particular interest to many applications. Residual stresses in cold-rolled steel tubes mainly originate from the rolling of a flat plate into a circular cross section (involving plastic deformations) and the weld bead that closes the cross section (involving non-uniform heating and cooling). Focus in this contribution is on the longitudinal weld bead that closes the cross section. To reveal the residual stresses in the tubes under consideration, a finite element analysis (FEA) of the welding step in the production process is made. The FEA of the welding process is validated with the temperature evolution of the thermal simulation and the strain evolution for the mechanical part of the analysis. Several methods for measuring the strain evolution are available and in this contribution it is investigated if the Digital Image Correlation (DIC) technique can record the strain evolution during welding. It is shown that the strain evolution obtained with DIC is in agreement with that found by electrical resistance strain gauges. The results of these experimental measuring methods are compared with numerical results from a FEA of the welding process.

Optimization Design of the Electromagnetic Torque for Surface-Mounted PMSM using GA and Finite Element Analysis for Electric Vehicle

2021 ◽  
Author(s):  
Edric Wee Ming Wong ◽  
Choo Jun Tan ◽  
Jenn Hwai Leong ◽  
Syauqina Akmar Mohd-Shafri ◽  
Dahaman Ishak ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Electric Vehicle ◽  
Optimization Design ◽  
Electromagnetic Torque ◽  
Element Analysis

scholarly journals Effciency of an Electrical Machine in Electric Vehicle Application

2016 ◽  
Vol 11 (1) ◽  
pp. 20-29 ◽  
Author(s):  
S. B. Shah ◽  
B. Silwal ◽  
A. Lehikoinen
Keyword(s):  
Electric Vehicle ◽  
Standard Method ◽  
Operating Cost ◽  
Electrical Machines ◽  
Electrical Machine ◽  
Test Machine ◽  
Current Component ◽  
Element Analysis ◽  
Voltage Drops ◽  
Wide Range

Machines have always made life simpler, directly or indirectly. They have been developed for a very wide range of applications. For the per- formance analysis of any machine, one important parameter to be considered is the machine loss. This consideration has signifcances like determining the effciency of the machine which in turn infuences the operating cost, determining the heating of machine and for accounting the voltage drops or current component associated with the cause of the losses and many more. Losses in electrical machines can be categorized according to the causes or phenomena that produce them. The effciency of an electrical machine directly depends on different kind of losses in the machine. Therefore, in this paper we primarily focus on the losses in the machine. First, all possible losses, their causes and effects in an electrical machine have been explained. A brief account of calculating those losses has also been explained. The standard method of calculating the effciency follows after that. Finally, a fnite element analysis is performed for a test machine and the losses and the effciency of the test machine is stud- ied. Journal of the Institute of Engineering, 2015, 11(1): 20-29 

scholarly journals The Bending Responses of Sandwich Panels with Aluminium Honeycomb Core and CFRP Skins Used in Electric Vehicle Body

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Yong Xiao ◽  
Yefa Hu ◽  
Jinguang Zhang ◽  
Chunsheng Song ◽  
Xiangyang Huang ◽  
...  
Keyword(s):  
Electric Vehicle ◽  
Failure Modes ◽  
Sandwich Panels ◽  
Vehicle Body ◽  
Stacking Sequence ◽  
Honeycomb Core ◽  
Fibre Direction ◽  
Element Analysis ◽  
Honeycomb Sandwich ◽  
Carbon Fibre Reinforced Plastic

The aim of this paper was to investigate bending responses of sandwich panels with aluminium honeycomb core and carbon fibre-reinforced plastic (CFRP) skins used in electric vehicle body subjected to quasistatic bending. The typical load-displacement curves, failure modes, and energy absorption are studied. The effects of fibre direction, stacking sequence, layer thickness, and loading velocity on the crashworthiness characteristics are discussed. The finite element analysis (FEA) results are compared with experimental measurements. It is observed that there are good agreements between the FEA and experimental results. Numerical simulations and experiment predict that the honeycomb sandwich panels with ±30° and ±45° fibre direction, asymmetrical stacking sequence (45°/−45°/45°/−45°), thicker panels (0.2 mm∼0.4 mm), and smaller loading velocity (5 mm/min∼30 mm/min) have better crashworthiness performance. The FEA prediction is also helpful in understanding the initiation and propagation of cracks within the honeycomb sandwich panels.

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