Abstract
In this paper, a three-dimensional (3D) woven fabric reinforced shape memorypolymer composite for impact mitigation was proposed, fabricated, programmedusing a three-step strain-controlled thermomechanical cycle at a pre-strain levelof 5% and machined to two groups of specimens (G1 and G2) with dimensions152.4 mm × 101.6 mm × 12.7 mm. The specimens were impact tested, transversely, centrally and repeatedly with 32 and42 J of energy. G1 specimens were healed after each impact until perforation occurred. G2specimens were not healed after each impact and served as controls. At 32 J impact energy,G2 specimens were perforated at the 9th impact while G1 specimens lasted until the 15thimpact; at 42 J impact energy, G2 specimens were perforated at the 5th impact while G1specimens were perforated at the 7th impact. Visual inspection, C-scan, and scanningelectron microscopy techniques were used to evaluate damage, failure modes, and healingefficiency.
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