多种损伤影响下正交层合板刚度退化研究

摘要

通过对纤维增强树脂基复合材料层合板的细观力学分析,建立了基体裂纹和纤维断裂2种损伤共存时正交层合板刚度退化模型.给出了纤维断裂损伤的计算方法,对正交层合板刚度退化过程进行了量化计算.结果表明,所建立的模型采用较少的几个参数即可描述层合板刚度退化过程,并与试验结果吻合较好.%Meso-mechanical analysis was carried out on FRP cross-ply laminate. A model was established to describe the stiffness reduction of the laminate with coexistence of cracks damage and fibre breakage. The calculation method of fibre breakage was put forward and the stiffness reduction process of the laminate was calculated. The simulation results showed that the proposed model has good capacity to describe the stiffness reduction of FRP laminate with a few parameter; the simulation results is in consistence with rest result.