Abstract：The dynamic buckling experiment of a belt bar subjected to axial impact was previously studied experimentally. The tests show that previous simulation methods are not very accurate. The finite element analysis accuracy is improved by improving the fidelity of the boundary conditions and properly selecting the finite element type and size. The boundary conditions for the joint clearance and friction are determined by comparing the numerical results with the test data, and shell elements and solid elements are found to give better results than beam elements. Simulations with thin or thick shell elements or solid elements with the new boundary conditions are more accurate than previous results with beam elements and simple boundary conditions. The refined finite element model predicts the 3-D reverse buckling of the belt bar.
刘赛, 吕振华. 扁长杆的冲击弹塑性屈曲特性分析的仿真有限元模型[J]. 清华大学学报（自然科学版）, 2016, 56(10): 1104-1108.
LIU Sai, LÜ Zhenhua. Finite element model refinement for elastic-plastic dynamic buckling of a belt bar during impact. Journal of Tsinghua University(Science and Technology), 2016, 56(10): 1104-1108.
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2016, Vol. 56 
