A novel empirical-based Delamination Reduction Trend (DRT) for stitched composites has been recently proposed. The DRT is capable of predicting the effective reduction in impact induced delamination area due to the influence of stitching. DRT simply relates two parameters: normalized delamination area and stitch fibre volume fraction, to characterize the effectiveness of stitching in impact damage suppression. This paper seeks to validate the DRT by using quasi-static indentation (QSI) test, which is considered analogous to low velocity impact test, due to similar structural response. Results from QSI test show good agreement with DRT. Furthermore, limitations in DRT have been established.
Tan, Kwek Tze; Watanabe, N.; Yoshimura, A.; and Iwahori, Y., "Validation of Delamination Reduction Trend for Stitched Composites using Quasi-Static Indentation Test" (2012). Mechanical Engineering Faculty Research. 1088.