Effect of EMAA stitching pattern on impact resistance of composites

doi:10.19936/j.cnki.2096-8000.20241228.002

Abstract

Abstract: In aerospace, stitched composites are widely used due to their excellent impact resistance. Different stitch patterns affect the impact resistance of composites, and during the stitching process, the stitches also have an effect on the intra-laminar properties of composites. In this paper, a combination of multi-scale modeling and experimental methods is used in order to investigate the effects of EMAA stitch spacing and stitch direction on the impact resistance and intra-laminar properties of composites. The results show that the validity of the multiscale modeling of stitched composite panels is verified. Stitching led to a decrease in the in-face properties of the composite laminates around the stitches, but improved the impact resistance in the out-face direction. Comparison of different stitch spacings showed that the smaller the stitch spacing, the higher the improvement in the impact resistance of the composite. Comparison of the performance of the two different stitch orientations, 45° and 0°, showed that the 45° stitch orientation was superior to the 0° stitch orientation in terms of both in-plane and out-of-plane performance.

Key words: EMAA, composites, stitching, mechanical property, low-speed impact, multi-scale modeling

CLC Number:

TB332

YIN Zhihao, GE Chaokun, XU Ping, TIE Ying, ZHANG Zhenzhen, JU Guang. Effect of EMAA stitching pattern on impact resistance of composites[J]. COMPOSITES SCIENCE AND ENGINEERING, 2024, 0(12): 12-18.

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