纤维织物超高速碰撞热-力学特性数值模拟  

Numerical Simulation of Thermodynamic Characteristics of Hypervelocity Impact on Fiber Fabric

作　　者：石景富 于东[2] 徐铧东 刘蕾[1] 苗常青[1] SHI Jingfu;YU Dong;XU Huadong;LIU Lei;MIAO Changqing(National Key Laboratory of Science and Technology on Advanced Composites in Special Environments,Harbin Institute of Technology,Harbin 150001,China;Department of Mechanical Design,School of Mechanical and Electrical Engineering,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]哈尔滨工业大学特种环境复合材料技术国家级重点实验室,哈尔滨150001 [2]哈尔滨工业大学机电学院机械设计系,哈尔滨150001

出　　处：《载人航天》2023年第4期427-433,共7页Manned Spaceflight

基　　金：载人航天领域预先研究项目(040101)。

摘　　要：针对纤维织物防护结构在空间碎片超高速碰撞下发生的变形、破碎及温升、相变等热-力学问题,引入Johnson-Cook模型及Gruneisen状态方程,结合纤维织物纱线编织几何模型及FEM-SPH耦合算法,建立了纤维织物超高碰撞数值模型,并研究了纤维织物强度对超高速碰撞热-力学特性的影响规律。结果表明:随着纤维织物强度的增加,纤维织物防护结构对弹丸的动能吸收能力增强;纤维织物碰撞区域热效应显著,随着纤维织物强度的增加,碰撞区域中心的热效应先增强后减弱;当纤维织物强度在2000 MPa附近时,碰撞区域中心的热效应较为显著。Aiming at the thermo-mechanic problems of fiber fabric shielding structure under the hy-pervelocity impact of space debris such as deformation,fragmentation,temperature rise and phase change,the fiber fabric hypervelocity impact numerical model was established based on Johnson-Cook model,Gruneisen equation of state,fiber fabric yarn weaving geometric model and FEM-SPH coupling algorithm,and the influence of fiber fabric strength on the thermal mechanic characteristics of the hypervelocity impact was studied.The results indicated that as the strength of the fiber fabric increased,the fiber fabric shielding structure had an enhanced ability to absorb kinetic energy of the projectile.The thermal effect in the region of impact was significant.As the strength of fiber fabric increased,the thermal effect at the center of the region of impact first increased and then weakened.When the strength of the fiber fabric was around 2000 MPa,the thermal effect was more significant at the center of the region of impact.

关 键 词：纤维织物 超高速碰撞 热-力学特性 空间碎片防护 

分 类 号：O347[理学—固体力学] V423[理学—力学]