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	Longitudinal compressive behavior and failure mechanism of three-dimensional five-directional carbon/phenolic braided composites at high strain rates
	Li, Dian-sen ; Lu, Zi-xing ; Fang, Dai-ning
	2010-10-12 ; 2010-10-12
关键词	3D braided composites Dynamic properties High strain rate Compression Failure mechanism Split Hopkinson pressure bar STRUCTURAL COMPOSITES PREDICTION STRENGTH MODEL Nanoscience & Nanotechnology Materials Science, Multidisciplinary
中文摘要	The uniaxial compressive stress-strain response of three-dimensional (3D) five-directional carbon/phenolic braided composites are experimentally investigated at high strain rates from 350 to 1600 s(-1) using the split Hopkinson pressure bar technique. The compressive loads are applied in a longitudinal direction (along the braiding direction). The macro- and micro-fracture morphology examinations are conducted using a scanning electron microscope (SEM) to understand the deformation and dynamic failure mechanism. The results show that the dynamic stress vs. strain curves exhibit a linear response followed by a load-drop at the on-set of matrix failure. The composites clearly demonstrate the strain rate strengthening effects and dynamic toughness phenomenon. The fracture morphology of the composites is varied under different loading rates. The damage is in the form of matrix cracking yielding and falling off, the interface debonding, and the migration, local buckling and shear fracture of the fibers. In addition, the ideal aspect ratio for the composites under dynamic compression is in the range of 0.75-1.25. (C) 2009 Elsevier B.V. All rights reserved.
语种	英语 ; 英语
出版者	ELSEVIER SCIENCE SA ; LAUSANNE ; PO BOX 564, 1001 LAUSANNE, SWITZERLAND
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/79022]
专题	清华大学
推荐引用方式 GB/T 7714	Li, Dian-sen,Lu, Zi-xing,Fang, Dai-ning. Longitudinal compressive behavior and failure mechanism of three-dimensional five-directional carbon/phenolic braided composites at high strain rates[J],2010, 2010.
APA	Li, Dian-sen,Lu, Zi-xing,&Fang, Dai-ning.(2010).Longitudinal compressive behavior and failure mechanism of three-dimensional five-directional carbon/phenolic braided composites at high strain rates..
MLA	Li, Dian-sen,et al."Longitudinal compressive behavior and failure mechanism of three-dimensional five-directional carbon/phenolic braided composites at high strain rates".(2010).

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