Modeling and multi-objective optimization of a bionic crash box with folding deformation

  • ChunYan Wang
  • Guangchao Lu
  • WanZhong ZhaoEmail author
  • Yuanlong Wang
Research Paper


Traditional crash box is unable to efficiently solve the problem of bending deformation during the collision process, which limits the energy absorption performance and crashworthiness. This paper introduces the structure of cactus into the design of crash box and attempts to redesign a new one with stable folding deformation. By imitating the cactus characteristic, the bionic crash box consists of two parts: one is the corrugated angular structure, and the other is its thickness functionally gradient distribution along the axial direction. Based on the sensitivity analysis, the parameters which have great influences on the energy absorption performance are selected as the design variables. The multi-objective optimization design is conducted based on response surface model and Latin hypercube design of experiment. Simulation results show that the bionic crash box can effectively weaken the damage to the autobody and improve the energy absorption performance through stable folding deformation.


Crash box Folding deformation Cactus Bionic structure Thickness gradient 



This work was support by the Fundamental Research Funds for the Central Universities (Grant No. NS2018013) and the Open Fund for Graduate Innovation Base of Nanjing University of Aeronautics and Astronautics (kfjj20180201).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • ChunYan Wang
    • 1
  • Guangchao Lu
    • 1
  • WanZhong Zhao
    • 1
    Email author
  • Yuanlong Wang
    • 1
  1. 1.Department of Automotive EngineeringNanjing University of Aeronautics and AstronauticsNanjingChina

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