Title: Vehicle structural collapse analysis using a finite element limit method

Authors: H.S. Kim, H. Huh

Addresses: Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 373-1 Kusongdong Yusonggu, Taejon 305-701, Korea. ' Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology, 373-1 Kusongdong Yusonggu, Taejon 305-701, Korea

Abstract: This paper discusses the collapse behaviour of vehicle structures under quasi-static loading conditions. The finite element limit analysis for three-dimensional structures is formulated based on the duality theorem in plasticity. The analysis considers sequential deformation of structures with work-hardening effects. The collapse analysis for an S-shaped frame is conducted using both the limit analysis program developed here and the commercial code ABAQUS. Results show a good agreement in load-carrying capacity and deformation mode predictions. Example studies also demonstrate that the method presented can be used to identify the weak part of a structure and change its design to enhance the load-carrying capacity and reduce vehicle passenger compartment distortions.

Keywords: 3-D finite element limit analysis; collapse analysis; S-shaped frame; space-framed vehicle structures; work-hardening; plasticity; sequential deformation; FEA; load-carrying capacity; passenger compartment distortions.

DOI: 10.1504/IJVD.1999.005595

International Journal of Vehicle Design, 1999 Vol.21 No.4/5, pp.436 - 449

Published online: 21 Oct 2004 *

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