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

摘要: Abstract 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 performed to identify the sequence and extent of damage corresponding displacements at which they occur for wide range laminate thicknesses. Energies absorbed different levels obtained from load–unload curves. Two support spans 25.4 mm (1 in.) 101.6 mm (4 diameter layers (1, 2, 4, 6, 11, 22 0.6 mm ply thickness) tested under quasi-static loading compression-shear tension-shear dominated modes damage. After each test, damaged plates sectioned visualize delamination material Numerical experiments conducted using LS-DYNA 970. The numerical modeling is newly developed model, namely MAT 162, has been incorporated into LS-DYNA. 162 uses mechanics principle progressive degradation. Input data required in have calibrated match experimental results 22-layer plate both (25.4 101.6 mm). properties used simulate other thicknesses, simulated show good agreement experiment results. It found that dominant mechanisms fiber breakage due shear tension.