Study on modeling micro-damage of cross-ply laminated composites

Transverse cracking and delamination damage are typical damage modes in laminated composites, on the study of the influence between the stiffness degrading and delamination damage induced by the transverse cracking, it is difficult to give attention to the influence of considering delamination and the computing precision by foregoing modes. Based on the shear-lag theory and the constructed way of the complete parabolic shear-lag analysis mode, a revised model was constructed. The relation of the stress and the transverse cracks density was studied, the predicted stiffness degrading was calculated, which compared with the others modes. The results show that the value obtained by the revised model is the best one to agree with the experimental data.