Effects of planimetric position of delamination on compressive failure of composite laminates

Abstract

Delamination is the main defect form of composite laminates. The strength and stiffness of composite laminates are greatly decreased due to delamination defects. In this paper, the FE model of composite laminates with delamination was established. And the nonlinear post-buckling response of composite laminates was investigated. The validity of the FE model was verified by comparing the analysis results with the experimental results. And a detailed parametric study was performed on the effects of planimetric position on the post-buckling behavior of laminates. Results show that the buckling mode does not depend on the planimetric position of the delamination; the closer the delamination is to the center, the greater the reduction of compressive strength.

A Review of Delamination Damage of Composite Materials

“…The mechanisms of delamination formation during cyclic loading are largely similar to those described in Sections 2.2 and 2.3. However, it is significant that synergistic effects are manifested during alternating cycles; for example, delaminations that appear at the edge of the plate under macroscopic tension can grow under compression due to microbuckling [41,42].…”