Experimental and numerical failure analysis of advanced composite structures with holes

Atar, Mehmet Bilal
In this work, a design methodology for advanced composite structures with holes is presented. A three dimensional finite element model (FEM) is constructed to simulate such a structural application similar to weight-pockets in helicopter blades. Material properties are obtained by a material characterization study. The progressive failure method with FEM is used for the material degradation. In order to induce delamination in simulation, cohesive layers are implemented between composite layers. Results are compared for sudden and progressive failure. Experiments are also conducted and the optimum computational approach to predict failure in such structures is discussed.