Abstract: 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 structural effects at regions 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 calculation results, it was found that there was a close relationship between the structural characteristics and the bending damage of the composite, the damage was initialled 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 the further damage evolution.

Key words: angle-interlock, composite, three-point bending, finite element