Impact-induced delamination suppression in laminated composites using through-thickness stitching

K. T. Tan, N. Watanabe, H. Hoshi, Yutaka Iwahori

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper aims to investigate the effectiveness of using through-thickness stitching in suppressing impact-induced delamination growth in laminated composites. Low-velocity impact tests are conducted on unstitched and stitched specimens with varying stitch density and stitch thread thickness. Results show that stitching effectively bridges and arrests delamination crack, and reduces delamination growth up to 40%. It is also revealed that increasing stitch density is more effective (23% reduction) in minimising delamination area than increasing stitch thread thickness (8% reduction). A novel empirical-based Delamination Reduction Law (DRL) has been formulated to predict the delamination reduction in stitched composites due to impact loading. The DRL is further validated with numerous published literature results, which have demonstrated good consistency and excellent agreement with the prediction curve. The effectiveness of stitching in impact-induced delamination, which is primarily mode II and without stitch breakage, is compared and discussed with authors' previous work on mode I fracture delamination of stitched composites.

Original languageEnglish
Title of host publication25th Technical Conference of the American Society for Composites and 14th US-Japan Conference on Composite Materials 2010
Pages486-497
Number of pages12
Publication statusPublished - 1 Dec 2010
Event25th Technical Conference of the American Society for Composites and 14th US-Japan Conference on Composite Materials 2010 - Dayton, OH, United States
Duration: 20 Sep 201022 Sep 2010

Publication series

Name25th Technical Conference of the American Society for Composites and 14th US-Japan Conference on Composite Materials 2010
Volume1

Conference

Conference25th Technical Conference of the American Society for Composites and 14th US-Japan Conference on Composite Materials 2010
CountryUnited States
CityDayton, OH
Period20/09/1022/09/10

Cite this

Tan, K. T., Watanabe, N., Hoshi, H., & Iwahori, Y. (2010). Impact-induced delamination suppression in laminated composites using through-thickness stitching. In 25th Technical Conference of the American Society for Composites and 14th US-Japan Conference on Composite Materials 2010 (pp. 486-497). (25th Technical Conference of the American Society for Composites and 14th US-Japan Conference on Composite Materials 2010; Vol. 1).