抄録
Recently the compatibility of crash safety and lightweight is one of the most important technical subjects in body design. It is considered that the resistant strength has to reach a balanced level between the energy absorption structures and the deformation control structures for crash safety design. Although the CAE technology has been widely and successfully used to get the characteristic values in the crash safety evaluation, it is necessary to accurately estimate the ultimate strength of the structural member of car in the initial stage of the design for time saving. In this paper, the post-buckling behavior of the structural member is considered and an analysis method is developed. By assuming the displacement during the buckling and applying Galerkin method, the ultimate strength is obtained and is in good agreement with the result of FEM.
