Dynamic Response of Stress Distributions in a Hybrid Lamina Subjected to the Crack

In this work transient dynamic stress concentration in a hybrid composite lamina subjected to a sudden internal crack is examined. It is assumed that all fibers lie in one direction and the applied load acts along direction of fibers. Using shear lag model، equilibrium equations are deduced and upon proper application of boundary and boundness conditions،the complete field equations are obtained using finite difference method. The results of dynamic effect of fiber breakage on stress concentration are well examined in presence of a second type fiber. These results are compared to those of their static values in both models. The effect of surface cracks on stress concentration، as a result of fiber breakage، is also examined.