720 鋼製薄肉円管の動的座屈モードとエネルギー吸収特性(GS-3 座屈挙動,研究発表講演)

概要

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In order to clarify the axial crushing behavior of thin-walled prisms in automobiles under dynamic compressive loads, a series of numerical crushing simulations and experiments for circular tubes of various lengths and thicknesses were carried out. In the experiments, the Instron type universal testing machine and the dynamic buckling test apparatus by using a sensing block were employed to obtain the wide range of strain rates. In the simulations, dynamic FEM code 'LS-DYNA' was used, and the specimens were modeled by using shell elements. Experimentally obtained load-displacement curves, the values of absorbed energy per unit volume and also the buckling modes and shapes were compared with those simulated, and it was found that simulated results were in good agreement with the experimental results. Base on the fact, we also tried to clarify the effects of the initial imperfection and the natural frequency on the buckling mode through the numerical simulations.
社団法人日本機械学会の論文
2005-03-18