Effects of Stitching on Damage Development for Non-crimp Fabric Composites based on Multi-scale Analytical Method

Abstract

In order to estimate stitching parameters on mechanical behaviors of non-crimp fabric (NCF) composites, test specimens had been prepared with changing the stitching parameters such as stitching pattern, pitch and direction. The static tensile test had been carried out, and the data of acoustic emission and optical digital image with applied load had been accumulated. The small stitching pitch, stitching loop and narrow width of channel were effective to delay the occurrence of initial damage. We had also developed a simulation procedure of mechanical behaviors for NCF based on mesh superposition method and had been verified by the experiment data.