干旱区生态环境知识资源中心(Arid): Temperature effects on high strain rate properties of graphite/epoxy composites

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报告编号	NASA-CR-189082, NAS 1.26:189082
来源ID	NTRS_Document_ID: 19920013242
	Temperature effects on high strain rate properties of graphite/epoxy composites
	Yaniv, G.; Daniel, I. M.; Cokeing, S.; Martinez, G. M.
英文摘要	A unidirectional graphite epoxy material (AS4/3501-6) was characterized at strain rates ranging from 5 x 10(exp 6) s(exp -1) to 5(exp -1), at room temperature and at 128 C. Results are presented in the form of stress-strain curves to failure. The longitudinal properties remain nearly unchanged with strain rate and temperature. The transverse modulus increases with strain rate but decreases with temperature. The transverse strength and transverse ultimate tensile strain have a positive rate sensitivity at low rates, which changes to negative at intermediate rates and returns to positive rate sensitivity at the highest rates tested. A temperature-time equivalence principle was applied and master curves were obtained for the transverse mechanical properties. The in-plane shear modulus and in-plane shear strength have a positive rate sensitivity. The ultimate intralaminar shear strain has a positive rate sensitivity at low rates, which changes to negative at high rates. At the elevated temperature of 128 C, the ultimate shear strain is 25 to 30 percent higher than the room temperature value, but its strain rate dependence is moderate.
英文关键词	FAILURE GRAPHITE-EPOXY COMPOSITES SHEAR STRAIN SHEAR STRENGTH STRAIN RATE STRESS-STRAIN RELATIONSHIPS TEMPERATURE EFFECTS EQUIVALENCE HIGH TEMPERATURE ROOM TEMPERATURE SENSITIVITY
出版年	1991
报告类型	Technical Report
语种	英语
国家	美国
URL	http://hdl.handle.net/2060/19920013242
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/259192
推荐引用方式 GB/T 7714	Yaniv, G.,Daniel, I. M.,Cokeing, S.,et al. Temperature effects on high strain rate properties of graphite/epoxy composites,1991.