On a matrix cracking model using Coulomb's friction law

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题名:	On a matrix cracking model using Coulomb's friction law
作者:	Chiang, Yih-Cherng
贡献者:	機械系
关键词:	matrix cracking Coulomb friction law Poisson contraction
日期:	2007
上传时间:	2009-11-13 14:27:19 (UTC+8)
摘要:	A matrix cracking model is developed based upon Coulomb friction law instead of a constant frictional shear stress usually assumed in the matrix cracking analyses. A Lame formulation incorporated with Coulomb friction law is adopted to solve the elastic states of fiber/matrix stress-transfer through a frictionally constrained interface in the slipping region and a modified shear lag model is applied to evaluate the elastic responses in the intact region. By using an energy balance approach, the critical stress for propagating a semi-infinite fiber-bridged crack in a unidirectional fiber reinforced composite is formulated in terms of the frictional coefficient rather than the frictional shear stress usually equated in the matrix cracking stress formulations. The critical stress for matrix cracking and the corresponding stress distributions calculated by the present Coulomb friction model will be compared with those predicted by the constant frictional shear stress models. The effect of Poisson contraction caused by stress redistribution between the fiber and matrix on the matrix cracking mechanics will be shown and discussed in the present analysis. (C) 2006 Elsevier Ltd. All rights reserved.
關聯:	ENGINEERING FRACTURE MECHANICS Volume: 74 Issue: 10 Pages: 1602-1616
显示于类别:	[機械工程系暨機械工程學系數位機電研究所] 期刊論文

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