TY - JOUR

T1 - Strength-Based Design Analysis of a Damaged Engine Mounting Bracket Designed for a Commercial Electric Vehicle

AU - Celik, H Kursat

AU - Ersoy, Hakan

AU - Dogan, Ayla

AU - Eravci, Gokhan

AU - Rennie, Allan

AU - Akinci, Ibrahim

N1 - The final publication is available at Springer via http://dx.doi.org/10.1007/s11668-021-01177-9

PY - 2021/8/31

Y1 - 2021/8/31

N2 - This study describes a strength-based design analysis protocol by means of finite element analysis (FEA) for a damaged engine mounting bracket in a converted electric vehicle. The mounting bracket considered in the study is a product specifically designed and manufactured for a converted electric vehicle and failed during conventional operation of the vehicle. Thus, design improvement/revision (redesign) on the bracket geometry was investigated. In this context, to prevent such undesired failures, strength-based design features such as deformationbehaviour and stress distribution under projected loads on the bracket should be properly described; however, an accurate description of these features of the bracket may become a complex experimental problem to be solved by designers. This study described redesign of the strength-based design features of the engine mounting bracket through finite element analysis under torsional loading generated by the electric engine that was determined to be the reason for the failure and thus the motivation to realise a safer design. Visual and numerical results obtained from the simulation revealed a clear understanding of the failurebehaviour of the bracket and therefore enabled an informed approach to the redesign stage. The initial FEA of the part design mapped the damage regions on the part geometry and indicated the stress magnitudes that were more than thematerial’s stress limits. The comparison of the failure plots and numerical data obtained from this initial FEA and physically damaged part was consistent. This concluded that the FEA satisfactorily exhibited the deformation behaviour and the main reason for the failure was insufficient geometry thickness and notch effect against predefined loading conditions. Therefore, the main design improvement was realised on these geometric features. Subsequently, the final FEA highlighted that the redesign would enable safe operation. This work contributes to further research into usage of numerical method-based deformation simulation studies for the mounting elements used in customised electric vehicles.

AB - This study describes a strength-based design analysis protocol by means of finite element analysis (FEA) for a damaged engine mounting bracket in a converted electric vehicle. The mounting bracket considered in the study is a product specifically designed and manufactured for a converted electric vehicle and failed during conventional operation of the vehicle. Thus, design improvement/revision (redesign) on the bracket geometry was investigated. In this context, to prevent such undesired failures, strength-based design features such as deformationbehaviour and stress distribution under projected loads on the bracket should be properly described; however, an accurate description of these features of the bracket may become a complex experimental problem to be solved by designers. This study described redesign of the strength-based design features of the engine mounting bracket through finite element analysis under torsional loading generated by the electric engine that was determined to be the reason for the failure and thus the motivation to realise a safer design. Visual and numerical results obtained from the simulation revealed a clear understanding of the failurebehaviour of the bracket and therefore enabled an informed approach to the redesign stage. The initial FEA of the part design mapped the damage regions on the part geometry and indicated the stress magnitudes that were more than thematerial’s stress limits. The comparison of the failure plots and numerical data obtained from this initial FEA and physically damaged part was consistent. This concluded that the FEA satisfactorily exhibited the deformation behaviour and the main reason for the failure was insufficient geometry thickness and notch effect against predefined loading conditions. Therefore, the main design improvement was realised on these geometric features. Subsequently, the final FEA highlighted that the redesign would enable safe operation. This work contributes to further research into usage of numerical method-based deformation simulation studies for the mounting elements used in customised electric vehicles.

KW - Electric vehicle

KW - Engine mounting bracket

KW - Product design

KW - Failure analysis

KW - Finite element analysis

U2 - 10.1007/s11668-021-01177-9

DO - 10.1007/s11668-021-01177-9

M3 - Journal article

VL - 21

SP - 1315

EP - 1322

JO - Journal of Failure Analysis and Prevention

JF - Journal of Failure Analysis and Prevention

SN - 1547-7029

IS - 4

ER -