Peridynamic theory for progressive damage prediction in center-cracked composite laminates

摘要

Numerical studies on the failure of composites have mostly employed the finite element method. However, it can be rather challenging to predict failure using this method. The assumption of lamina homogeneity is questionable when predicting failure, though it is suitable for stress analysis. Matrix cracking, fiber breakage, and delamination are inherent to the inhomogeneous nature of the composite, thus the assumption of material homogeneity taints the failure prediction. It is, therefore, essential that the inhomogeneous nature of the composites must be retained in the analysis in order to predict the correct failure modes. Hence, this study considers distinct properties of the fiber and matrix and their volume fractions and fiber orientations while modeling composite laminates. The peridynamic theory is employed to predict the damage in center-cracked laminates with different fiber orientations. The predictions from the peridynamic analysis agree with the experimental observations published in the literature.