基于CDM的复合材料层合板三维非线性渐进损伤分析

Three-Dimensional Nonlinear Progressive Damage Analysis on Composite Laminates Based on Continuum Damage Mechanics

建立了基于连续介质损伤力学(CDM)的中等尺度复合材料层合板三维渐进损伤分析模型。模型中损伤材料本构方程采用对应于不同损伤模式的内部状态变量进行描述,材料失效准则采用三维HASHIN准则。分析了含孔复合材料层合板压缩试件,计算强度与试验数据的吻合表明该模型可用于预测含孔层合板的压缩强度,同时该模型可以预测层合板的失效模式以及损伤发生、扩展直至最终破坏的整个过程,并且该模型具有较好的计算收敛性。

A three dimensional progressive damage model at the mesoscale level is established to analyze composite laminates in the framework of continuum damage mechanics （CDM）. The constitutive equation of the damaged composite lamina is described with internal damage state variables corresponding to various damage modes. The three-dimensional HASHIN criteria are adopted to determine the composite failure initiation. The composite laminates containing a central hole under compression are calculated by the model. The numerical ultimate strength is in agreement with the experimental model. The result shows that the model can predict whole process of composite laminate failure modes, the damage initiation, progressive and final failure. Thus, the model has a good calculation convergence characteristic.