侧向剪切载荷下金属薄壁圆管的吸能特性研究

Deformation and Energy Absorption Properties of Thin-walled metal tubes under Lateral Shear Load

利用实验和数值模拟相结合的方法研究了薄壁金属圆管在准静态侧向剪切荷载下的变形和吸能特性,通过有限元软件LS-DYNA建立了准静态理论分析模型,并与实验结果进行了对比,结果表明数值模型结果和实验结果吻合较好。基于建立的理论分析模型,研究了管的几何尺寸对侧向剪切力、总吸能和比吸能的影响。结果表明,在准静态侧向剪切力下,薄壁金属圆管的剪切力、总吸能和比吸能随着管壁厚的增加而增大;而相反侧向剪切力、总吸能、比吸能随着管直径的增加而减小。

In this paper, the deformation and energy absorption properties of thin-walled metal tube under quasi-static lateral shear loading are studied by the combination of experimental research and numerical simulation. The quasi-static theoretical analysis model is established by finite element software LS-DYNA. The experimental results are compared, which show that the numerical model and experimental results agree well. Based on the established theoretical analysis model, the effects of tube geometry on lateral shear force, total energy absorption and specific energy absorption were studied. The results show that under quasi-static lateral shearing force, the shearing force, total energy and specific energy of thin-walled metal tube increase with the increase of tube wall thickness. On the contrary, the lateral shearing force, energy absorption, specific energy absorption decreases as the tube diameter increases.