Finite element calculation for three-point bending damage of three-dimensional angle-interlock woven composites

In order to describe the dynamic responses and structural damage behavior of one type of layer-to-layer three-dimensional angle-interlock woven composite under three-point bending loading condition, the deflection-time curve,damage evolution, stress distribution and effects of stress concentration of the composite under the bending loading condition of constant velocity were calculated by finite element analysis( FEA) software ABAQUS in the microstructural level of yarn and resin. By analyzing the calculated results,it was found that there was a close relationship between the structural characteristics and the bending damage of the composite,and the damage was initiated at the regions of stress concentration. In addition,these regions located at the wave-shape parts of undulated warp yarns, such structural characteristic induced these regions to carry the majority part of load and hence led to further evolution of the damage.