Progressive damage and delamination in plain weave S-2 glass/SC-15 composites under quasi-static punch-shear loading

Quasi-static punch-shear tests are carried out on plain weave (PW) S-2 glass/SC-15 epoxy composite laminates with a right circular cylinder punch. Load–unload tests are performed to identify the sequence and extent of damage and the corresponding displacements at which they occur for a wide range of laminate thicknesses. Energies absorbed at different levels of damage are obtained from the load–unload curves. Two different support spans of 25.4...