Progressive damage analysis of open holed cross-ply laminate under static loading

In the present study, progressive damage analyses of an open hole cross-ply laminate under static loading is investigated using experimental and numerical approaches. For this purpose, thermal imaging is used for capturing thermal distribution around stress concentration areas. Experimental observation shows that the areas around the open hole containing significant damages has larger temperature gradient. Instantaneous damage growth near the static catastrophic failure onset around the hole, caused temperature raised abruptly in these areas. A numerical progressive damage analysis is also performed to predict the behavior of cross-ply laminate under static loading. Different failure modes of open holed cross-ply laminates are analyzed using cohesive zone modeling (CZM) and continuum damage mechanics (CDM) approaches. The model is implemented as a User-written material (UMAT) subroutine in ABAQUS software for predicting damage initiation and propagation. It is shown that the predicted results are in good agreement with the experimental results and thermal images.

کلیدواژه ها:

Cohesive zone model ، Continuum damage mechanics ، thermal imaging ، Cross-ply laminate ، Progressive damage analysis