关键词: 复合材料, 连续介质损伤力学模型, 粘聚区模型, 开口结构, 补强, 强度

Abstract: It is of engineering significance to determine the parameters of reinforcement design of notched composite laminates. In order to understand the influence of these parameters on the structure strength and damage propagation, a three-dimension anisotropic continuum damage model (CDM) is developed to describe the onset and damage evolution in a notched composite laminate under tensile loading condition. A cohesive zone model (CZM) is used to simulate the damage evolution of an adhesive material between the notched composite laminate and the patched reinforcement structure. Good agreement is obtained between the numerical and the experimental results. Based on the validated model, three main parameters for reinforcement design are discussed, i.e., the lay-up configuration, patch thickness and radius of patch reinforcement. Furthermore, the delamination of the adhesive layer between the laminate and the patch is found to be the primary reason for the final failure of the reinforced structure.

Key words: composite materials, continuum damage model, cohesive zone model, notched structure, reinforcement, strength