摘要
考虑纤维织物碰撞过程中的生热、应变率强化及高温软化效应,引入Johnson-Cook模型及Gruneisen状态方程,建立纤维本构模型,基于FEM-SPH耦合算法,考虑纤维织物的纱线编织结构,建立了纤维织物超高速碰撞热-力学单胞模型。该模型可给出纤维织物超高速碰撞过程中的侵彻、破碎、应力、应变等力学信息,及纤维织物的生热和温度场等热学信息,模型分析与试验结果具有较好的一致性。
A new thermo-mechanical model for fiber fabric of hypervelocity impact is established by using the Johnson-Cook model,the Gruneisen equation of state and the FEM-SPH coupling algorithm,while some new factors are taken into account such as the heat generation,strain rate strengthening and high temperature softening of materials.Mechanical and thermal information could be obtained with the model,such as penetration,fragmentation,stress and strain,heat generation and temperature field of fiber fabric.The analysis results are in good agreement with the experimental results.
作者
张祎
王玉林
石景富
于东
徐铧东
马付健
宋迪
苗常青
ZHANG Yi;WANG Yu-lin;SHI Jing-fu;YU Dong;XU Hua-dong;MA Fu-jian;SONG Di;MIAO Chang-qing(National Key Laboratory of Science and Technology on Advanced Composites in Special Environments,Harbin Institute of Technology,Harbin 150001,China;Department of Aerospace Research and Exploration,China Academy of Launch Vehicle Technology,Beijing 100076,China;Department of Mechanical Design,School of Mechanical and Electrical Engineering,Harbin Institute of Technology,Harbin 150001,China;China Aerodynamics Research and Development Center,Mianyang 621000,China;School of Mechanical and Electrical Engineering,University of Electronic Science and Technology of China,Chengdu,611731,China)
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2021年第11期1475-1482,共8页
Journal of Astronautics
