Abstract

In this work, mode-I dynamic interlaminar and intralaminar fracture behaviors of carbon fiber reinforced polymers (CFRPs) are studied. Thick unidirectional composites were processed and their fracture performance was characterized under both quasi-static three-point bending and dynamic one-point impact loading conditions. Both crack initiation and growth characteristics under stress-wave dominant loading conditions were evaluated in the latter case. The optical methods of digital image correlation (DIC) and ultra-high speed photography were employed to monitor crack tip deformations around transiently growing cracks. Interlaminar fracture responses were compared to the intralaminar counterparts using specimens of identical dimensions from the same original composite sheet. To author’s knowledge, this will be the first work to compare interlaminar and intralaminar fracture of unidirectional samples cut from the same composite sheet and using the same test geometry.

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