Figure 1. The geometry of the laminate test coupons; (a) without the DHS, and (b) with the DHS

From

The Effect of Defence Hole System on the Failure Load and Bearing Strength of GFRP Bolted Joint

Khudhayer J. Jadee, A.R. Othman

American Journal of Mechanical Engineering. 2015, 3(4), 135-141 doi:10.12691/ajme-3-4-5