Advanced Composite Materials

The Korean Society for Composite Materials (한국복합재료학회)
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Characterization of tensile damage progress in stitched CFRP laminates

  • Yoshimura, Akinori (Graduate school of Frontier Sciences, The University of Tokyo) ;
  • Yashiro, Shigeki (Research Institute of Instrumentation Frontier, National Institute of Advanced Industrial Science and Technology (AIST)) ;
  • Okabe, Tomonaga (Department of Aerospace Engineering, Tohoku University) ;
  • Takeda, Nobuo (Graduate school of Frontier Sciences, The University of Tokyo)
  • Published : 2007.09.01
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Abstract

This study experimentally and numerically investigated the tensile damage progress in stitched laminates. In particular, it focused on the effects of stitching on the damage progress. First, we experimentally confirmed that ply cracks and delamination appeared under load regardless of stitching. We then performed damage-extension simulation for stitched laminates using a layer-wise finite element model with stitch threads as beam elements, in which the damage (ply cracks and delamination) was represented by cohesive elements. A detailed comparison between observation and the simulated results confirmed that stitching had little effect on the onset and accumulation of ply cracks. Furthermore, we demonstrated that the stitch threads significantly suppressed the extension of the delamination.

Keywords

References

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