Design of Cubic Energy Absorber with Functionally Graded Geometry for progressive-functional performance

Document Type : Research Article

Authors

1 Department of Mechanical Engineering, University of Birjand, Birjand, Iran

2 Department of Mechanical Engineering, University of Birjand, Birjand, Iran.

3 Department of Mechanical engineering, University of Birjand, Birjand, Iran

Abstract

Nowadays, with the increasing number of vehicles and their high speeds, it is very important to protect passengers and goods inside them by designing of energy absorbers with high reliability during accidents. Energy absorbers prevent major damage to the vehicle body by absorbing the kinetic energy to plastic deformation and crushing. Material and geometric shape are most important effective in the performance of energy absorbers. In this study, the effect of smart functionally geometric designs of the porous cubic absorber have been investigated. The main criteria are the total and specific energy absorbed. At first, by comparing the results of the simulated model using the finite element method with experimental tests, the results are validated. Then, by applying design of experiments method, the analysis of different geometric shapes on its behavior was performed. The results obtained show that the amount and shape of porosity have a significant effect on the overall performance of the total and specific energy, and initial collapse force. For example, in case with initial diameter 3 mm and change parameter 1.2, functionally geometric can be reduced 17, 26 and 25 percent mass, total energy and initial collapse force respectively. Therefore, the amount and functionally shape of porosity have a significant effect on the overall performance of the adsorbent for low initial collapse force and high capacity of absorbent energy stimulatingly.

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Amirkabir Journal of Mechanical Engineering
Volume 57, Issue 9
in progress
December 2025

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