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	The modified Gurson model accounting for the void size effect
	Wen, J. ; Huang, Y. ; Hwang, K.C. ; Liu, C. ; Li, M.
	2010-05-07 ; 2010-05-07
关键词	Theoretical or Mathematical/ deformation dislocations metals stress-strain relations voids (solid)/ void size effect modified Gurson model deformation metallic materials failure microvoids void volume fraction Taylor dislocation model uniaxial tension stress-strain curve/ A8140L Deformation, plasticity and creep A6220F Deformation and plasticity A6170Q Inclusions and voids
中文摘要	The Gurson model [J. Engng. Mater. Technol. 99 (1977) 2] has been widely used to study the deformation and failure of metallic materials containing microvoids. The void volume fraction is the only parameter representing voids since the void size does not come into play in the Gurson model. Based on the Taylor dislocation model [Proc. R. Soc. (Lond.) A145 (1934) 362; J. Int. Metals 62 (1938) 307], we extend the Gurson model to account for the void size effect. It is shown that the yield surfaces for micron- and submicron-sized voids are significantly larger than that given by the Gurson model. For a voided, dilating material subject to uniaxial tension, the void size has essentially no effect on the stress-strain curve at small initial void volume fraction. However, as the initial void volume fraction increases, the void size effect may become significant.
语种	英语 ; 英语
出版者	Elsevier ; UK
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/15825]
专题	清华大学
推荐引用方式 GB/T 7714	Wen, J.,Huang, Y.,Hwang, K.C.,et al. The modified Gurson model accounting for the void size effect[J],2010, 2010.
APA	Wen, J.,Huang, Y.,Hwang, K.C.,Liu, C.,&Li, M..(2010).The modified Gurson model accounting for the void size effect..
MLA	Wen, J.,et al."The modified Gurson model accounting for the void size effect".(2010).

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