Comparisons of static bending and fatigue damage between 3D angle-interlock and 3D orthogonal woven composites

This paper presents the comparisons of quasi-static three-point bending and fatigue damage behaviors between the three-dimensional angle-interlock woven composite and the three-dimensional orthogonal woven composite. The stress-deflection curves and failure modes were recorded to compare both composites' mechanical properties under quasi-static bending loading condition. The S-N curves were obtained to demonstrate the comparison of fatigue life under various stress levels between three-dimensional angle-interlock woven composite and three-dimensional orthogonal woven composite. In addition, the damage indexes versus number of cycles (D-N) curves were given to characterize the three-stage cumulative fatigue damage evolution of both types of textile structural composites. Furthermore, the ultimate damage morphologies were compared to deduce the structural effects of the composites under three-point bending cyclic loading condition.