The influence of lay-up and thickness on composite impact damage and compression strength

摘要: The effects of composite stacking sequence, thickness, and percentage zero-degree plies on the size, shape, distribution delamination through laminate thickness residual compression strength following impact were studied. Graphite/epoxy laminates impacted with an 0.5 inch diameter aluminum sphere at a specific low or high velocity. Impact damage was measured nondestructively by ultrasonic C-scans X-radiography destructively deply technique, tests performed. It found that differences in failure strain due to sequence small, while very percentages had similar loads but higher strains than plies. Failure did not correlate planar area, delaminations regions associated matrix cracking.