Study on the Deformation Modes of an Axially Crushed Compact Impact Absorption Member

In this paper, the deformation modes of a compact impact absorption member subjected to axial compression are investigated using finite element method and experiments. A multiple combination compact impact absorption member, referred to as a 'compress-expand member', is proposed to substitute the conventional thin-walled circular tube. This study found that the proposed compact impact absorption member has stable load increase characteristics and a wider range of high load efficiency (Pave/Pmax) than the thin-walled circular tube. Moreover, the proposed compact impact absorption member can absorb larger loads in a smaller radius than the thin-walled cylindrical tube, as it can maintain its stable deformation in increased wall thicknesses.

• Shigeyuki Haruyama
• Hiroyuki Tanaka
• Dai-Heng Chen
• Aidil Khaidir Bin Muhamad

• axial collapse
• compact impact absorption member
• finite element method
• thin-walled cylindrical tube.

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