Abstract
Instrumented dropweight impact tests are conducted for CFRP laminates. Impact-induced damage, transverse cracks and delamination are investigated microscopically. Transverse crack density and delamination area are measured as functions of impact energy. In addition, the residual compressive strength is measured, and the correlation between the impact energy and the microscopic damage with the attributed residual compressive strength is discussed. It is found that the residual compressive strength decreases as the impact energy increases but above a certain impact energy, the decrease in the strength becomes gradual.
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