Crash Analysis of Structures Consisting of Thin-Walled Metal Components
This paper presents a crash modeling of thin-walled metal components whose crash characteristics are controlled by local buckling. The force-deformation relationship of such components can be, generally, divided into three parts: linear, post buckling and deep-collapse. The buckling stress determines the linear limit and the crippling stress determines the maximum load capacity from where the components undergo deep-collapse. During the post buckling the effective area concept is used to calcluate element stiffness. During the deep-collapse “crash-type” hinges are formed and the elements undergo inelastic folding. The element stiffness depends on the fold shape and mode. This concept is incorporated into the computer program “VCRASH” for the crash analysis of general three-dimensional thin-walled structures. The analytical results show a good agreement with test data.
KeywordsBeam Element Plastic Hinge Local Buckling Lawrence Livermore National Laboratory Maximum Load Capacity
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