摘要
本文对层合复合材料在冲击载荷作用下的细观损伤和宏观损伤（分层、基体开裂、纤维断裂）的破坏机理提出了一种分析模型。该模型假设材料的非线性是由于冲击过程中的细观损伤引起的，在单元本构方程中处理；采用最大应变分量准则，处理材料的宏观损伤，并考虑了相邻层（或单元）材料状态的影响，采用节点分裂的方法模拟上述宏观损伤机理。
A model is developed to express the mesodamage, macrodamages (including debond, matrix crack and fiber break) and fracture process of composite laminates impacted by a projectile. It is assumed that the nonlinearity of composites is induced by the mesodamage produced in impact process, and is considered in constitutive equations. A maximum strain criterion is presented by the authors, and can be used to analyze the macrodamages of composites. The process of the macrodamage is simulated by the nodal separate technique.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
1997年第4期119-124,共6页
Acta Materiae Compositae Sinica
基金
国家自然科学基金
关键词
层合材料
复合材料
冲击
破坏准则
损伤机理
composite laminates, impact, failure criteria, damage mechanism, numerical simulation
