不同压溃速度下复合材料圆管吸能特性试验及数值模拟研究  

Experimental and Numerical Simulation Research on the Energy Absorption Properties of Composite Circular Tubes at Different Crushing Velocities

作　　者：白佳瑶 黄金红 侯兵[1] 惠旭龙 索涛[1] Bai Jiayao;Huang Jinhong;Hou Bing;Hui Xulong;Suo Tao(Northwestern Polytechnical University,Xi'an 710072,China;State-owned Wuhu Machinery Factory,Wuhu 241000,China;Aviation Key Laboratory of Science and Technology on Structures Impact Dynamics,Aircraft Strength Research Institute of China,Xi’an 710065,China)

机构地区：[1]西北工业大学,陕西西安710072 [2]国营芜湖机械厂,安徽芜湖241000 [3]中国飞机强度研究所结构冲击动力学航空科技重点实验室,陕西西安710065

出　　处：《航空科学技术》2021年第12期66-73,共8页Aeronautical Science & Technology

基　　金：国家自然科学基金(11972310);民机科研项目(MJKY-2017-F-15);航空科学基金(20184153029)。

摘　　要：复合材料除了比强度高、比刚度高等优点外,还具有良好的能量吸收能力。本文开展了复合材料圆管在2mm/min、0.5m/s、7.5m/s三个不同压溃速度下的吸能特性试验研究。研究结果表明,三种压溃速度下复合材料圆管表现出相同的破坏模式,且比吸能较为接近,率敏感性不显著。进一步开展了7.5m/s压溃速度下复合材料圆管吸能特性有限元数值模拟,模拟结果与试验结果一致。Carbon fiber reinforced composites are widely used due to their advantages of high specific strength, high specific stiffness, and good energy absorption capacity. In this paper, the energy absorption properties of composite circular tubes under different crushing velocities are studied both experimentally and numerically. The tests on composite circular tubes are carried out under three axial crushing velocities of 2 mm/min, 0.5 m/s and 7.5 m/s respectively. It is found that the composite tubes show the same failure mode and the closed specific energy absorption at different loading velocities, which means the energy absorption capacity is not sensitive to the loading rate. The finite element model of the composite tube under the crushing velocity of 7.5 m/s is established, and the accuracy of the model is verified by the experimental results.

关 键 词：复合材料圆管 率效应 吸能特性 破坏模式 数值仿真 

分 类 号：O34[理学—固体力学]