摘要
建立了含孔复合材料层合板的三维有限元模型,以二维Zinovie理论为基础,结合改进的三维Hashin准则,对二维Zinoviev理论进行了简化和拓展,提出了适用于三维模型的刚度退化方案,完成了对层合板的渐进失效分析。从纤维失效、基体失效、分层失效三个方面讨论了层合板在拉伸载荷作用下的失效过程,并预测了层合板的拉伸极限强度及破坏模式。数值模拟结果与试验基本吻合,验证了所提出退化模型的正确性。
An investiagtion was conducted to study tensile failure of composite laminates with an open hole.Both a numerical simulation and experiments were performed during the study. A three-dimensional finite element model for composite laminate with an open hole was built. The progressive damage analysis contains four parts： the constitutive model,calculating the stresses,failure criteria and the stiffness degradation. Many theories have been proposed based on different physical,mechanical or logical considerations. There were great differences by using difference theory. A three-dimensional stiffness degradation model based on the two-dimensional Zinoviev theroy and combined with the improved three-dimensional Hashin criterion was proposed. This paper described composite laminates＇ failure process in three aspects： fiber failure,matrix failure and delamination failure,and predicted the ultimate tensile strengths and damage progression of the open-hole composite laminates. Overall,good agreement were found between numerical simulation and experiment. And,it proved the high accuracy of the three-dimensional stiffness reduction model,which could be used to guide the composite laminates＇ progressive failure analysis.
出处
《玻璃钢／复合材料》
CAS
CSCD
北大核心
2016年第8期44-49,共6页
Fiber Reinforced Plastics/Composites
