期刊
SMART MATERIALS AND STRUCTURES
卷 19, 期 3, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0964-1726/19/3/035007
关键词
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资金
- National Science Foundation (NSF) [CMMI 0946740, CMMI 0900064]
- Directorate For Engineering [0900064] Funding Source: National Science Foundation
- Div Of Civil, Mechanical, & Manufact Inn [0946740] Funding Source: National Science Foundation
In this paper, a three-dimensional (3D) woven fabric reinforced shape memory polymer composite for impact mitigation was proposed, fabricated, programmed using a three-step strain-controlled thermomechanical cycle at a pre-strain level of 5% and machined to two groups of specimens (G1 and G2) with dimensions 152.4 mm x 101.6 mm x 12.7 mm. The specimens were impact tested, transversely, centrally and repeatedly with 32 and 42 J of energy. G1 specimens were healed after each impact until perforation occurred. G2 specimens 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 15th impact; at 42 J impact energy, G2 specimens were perforated at the 5th impact while G1 specimens were perforated at the 7th impact. Visual inspection, C-scan, and scanning electron microscopy techniques were used to evaluate damage, failure modes, and healing efficiency.
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