纤维金属层板分层扩展的优化分析

Optimization analysis of delamination growth in fiber reinforced metal laminates under cyclic loading

以纤维金属层板疲劳裂纹扩展与分层扩展预测模型为基础，对分层扩展的影响因素，包括单层厚度、残余应力、增强纤维的弹性模量、层间结合强度和胶粘剂的剪切模量等，进行了分析。研究表明，降低材料的单层厚度和改善层板的残余应力系统可显著降低层板的分层扩展速率，而提高层间结合强度和增强纤维的弹性模量对降低层板的分层扩展速率的作用相对较小。

Based upon a theoretical model for predicting the fatigue crack growth and the delamination growth in fiber reinforced metal laminates, the effects of some factors on the delamination growth rates, including the ply thickness, the residual stresses, the modulus of the fibers, the bonding strength and the shear modulus of the adhesive were estimated. It has been shown from the analysis that the delamination growth can be significantly improved by decreasing the ply thickness and the residual stresses in the constituent metal layers. The effects of the bonding strength and the modulus of the fibers are relatively small, and the effect of the shear modulus of the adhesive can be neglected.