Volume 3, Issue 5 (May 2006)
Prediction of Effective Stiffness of a Cross-Ply Laminate with Transverse Matrix Cracks
A theoretical model based on the stationary value of total potential energy has been proposed to evaluate effective elastic constants in a cross-ply laminate with transverse matrix cracks. The method is based on the principle of minimum total potential energy. In the model, displacement fields and stress components satisfy the boundary and continuity conditions. Crack geometry is based on general functional minimization rather than assumed shape functions. Moreover, the crack shape is shown to be a function of crack density. The changes in stiffness reduction are examined theoretically. Predicted results are compared with test data.