Theoretical and numerical crush analysis of multi-stage nested aluminium alloy tubular structures under axial impact loading

Bài báo do nhóm tác giả Trong Nhan Tran, Duc Hieu Le. Ahmad Baroutaji Trường Đại học Tôn Đức Thắng, Đại Học Công nghiệp Hà Nội, Đại Học Wolverhamton. Bài báo được đăng trên tạp chí Engineering Structures (IF: 3.084) nhà xuất bản Elsever số 182 năm 2019 (39-50)

Keywords:Axial loading, Impact, Crashworthiness, Nested tubes, Theoretical analysis

ABSTRACT

In this paper, the crush behaviour and energy absorption performance of nested tubular thin-walled structures made of aluminium alloy AA6061-O under dynamic axial loading are investigated. Theoretical solutions forAverage Crush Force (P acf) of these structures are proposed by combining the energy method, simple super-position principle, and interaction among the various components of the structures. The derived theoreticalmodels are verified by comparing their predictions with numerical and experimental values. The energy ab-sorption indicators of the various structures are calculated and used to compare the various structures and todetermine the best performing one. It is found that the nested structure with a higher number of tubes exhibitsthe best crashworthiness performance due to energy absorption enhancements resulted from the interaction effects between its components as well as its capability to reduce the peak crush force.

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