Article in Periodicals of Engineering and Natural Sciences (pen) · October 017 doi: 10. 21533/pen v5 134 citations reads 285 authors: Some of the authors of this publication are also working on these related projects

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Periodicals of Engineering and Natural Scinces 
 
ISSN 2303-4521
 
Vol.5, No.3, November 2017, pp. 387~395 
Available online at:
http://pen.ius.edu.ba
 
DOI: 10.21533/pen.v5i3.134 
387 
An Investigation on Deformation Behaviors of Energy Absorbers for 
Passenger Coaches
 
 
 
Ramazan ÖZMEN
1
, Mustafa GÜNAY
2
 
1
Department of Mechatronics Engineering,KarabükUniversity 
2
Department of Mechanical Engineering, Karabük University 
Article Info 
ABSTRACT 
Article history: 
Received Jun 1
th
, 2017 
Revised Aug 20
th
, 2017 
Accepted Oct 18
th
, 2017 
Thin-walled structures is used commonly as energy absorbers at the front and 
back of the coaches. These parts should be designed to minimize the damage 
to the vehicle and prevent the passengers from fatality and/or injury by 
absorbing the collision energy in railway transportation. In this paper, 
deformation behaviors of tube like structures with truncated cone under the 
axial impact load were investigated by means of finite element analysis 
(FEA). The energy absorbers having tube like structures were modelled at the 
same weight and have three different wall thickness and taper angle. As a 
result of FEA, the performances of straight and truncated cone type energy 
absorbers were compared in terms of energy absorption capacities and an 
optimization study was done to determine the effects of thickness and taper 
angle on energy absorbing performances of the members. The analysis of 
variance in 95% confidence level was applied in order to determine the effects 
of design parameters on total efficiency (TE). Besides, optimum design 
parameters for TE were determined by using Taguchi optimization 
methodology. Thickness was found as the most significant parameter on total 
efficiency with 60.52% percentage contribution ratio according to ANOVA 
results. 
Keyword: 
Energy absorbtion 
Finite element analysis 
HSLA steel 
Truncated tube 
Optimization