摘要
本文基于低速冲击动力学理论和复合材料层合结构损伤破坏准则,采用以不协调模式的八节点块三维有限单元法,研究了在空载和满载下含金属内衬的纤维缠绕容器在冲击下的力学行为,并预测了其冲击损伤分布。在分析中应用修正的Hertzian接触法则来计算在冲击载荷下冲击体和缠绕结构之间的接触力;在时域中采用Newm ark方法求解。通过典型数例研究结果表明,在相同能量的冲击载荷作用下,满载(内压)下的纤维缠绕容器较空载容器更易发生基体开裂和分层破坏。
Based on the low velocity impact kinetic theory and corresponding damage criterion for the laminated composite structures, a 3-D incompatible finite element method is employed to investigate the impact mechanical behavior of the filament wound cylindrical vessel with metal liner with and without internal pressure and predict their damage distributions during and after impact. A modified Hertzian contact law is used to calculate the contact force between the impact body and impacted cylindrical vessel and a direct integral scheme-Newmark method is applied in time domain during impact analysis process. From the numerical results of a typical vessel, it is clear that the impact damage extent for the filament wound vessel with internal pressure is more severe than that without internal pressure under low velocity impact with same kinetic energy.
出处
《玻璃钢／复合材料》
CAS
CSCD
北大核心
2006年第1期3-6,20,共5页
Fiber Reinforced Plastics/Composites
基金
国家863项目"复合材料纤维缠绕容器"资助
关键词
低速冲击
损伤特征
含金属内村的纤维缠绕容器
有限元
low velocity impact
damage characteristics
filament wound vessel with a metal liner
finite element method
