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复合材料基体横向开裂和分层损伤是正交层板的主要损伤类型,在由横向基体开裂而诱发的分层损伤对材料刚度衰减影响的研究中,考虑分层影响和模型计算精度先前模型两者难以兼顾。基于剪切滞后分析理论和完全抛物线模型构建方法,建立了修正的包含分层损伤的完全抛物线剪切滞后模型,并依此模型研究了应力与横向裂纹密度的关系,对材料刚度衰减进行了预测计算,并与其它几种模型进行了比较,结果表明,所建模型所得的预测结果与实验值符合得最好。
Lateral cracking and delamination of the composite matrix are the main types of damage to the orthotropic laminates. In the study of the effect of delamination damage induced by the delamination of the transverse matrix on the material stiffness decay, the layered effects and the model calculation accuracy were considered. Previous models two Difficult to take into account. Based on the theory of shear lag analysis and the method of constructing a complete parabola model, a modified complete parabolic shear lag model including delamination damage is established. Based on this model, the relationship between stress and transverse crack density is studied and the material stiffness attenuation is predicted Calculated and compared with several other models. The results show that the predictions obtained by the model are in good agreement with the experimental ones.