Dynamic damage and failure in viscoplastic materials

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	Dynamic damage and failure in viscoplastic materials
	Zheng J(郑坚); Wang ZP
刊名	Engineering Fracture Mechanics
	1995
卷号	52 期号:6 页码:1065-&
关键词	Fracture Ductile Copper
ISSN号	0013-7944
通讯作者	JIAN, Z (reprint author), CHINESE ACAD SCI,INST MECH,NON LINEAR MECH CONTINUOUS MEDIA LAB,BEIJING 100080,PEOPLES R CHINA.
中文摘要	In this paper, a dynamic damage model in ductile solids under the application of a dynamic mean tensile stress is developed. The proposed model considers void nucleation and growth as parts of the damage process under intense dynamic loading (strain rates epsilon greater than or equal to 10(3) s(-1)). The evolution equation of the ductile void has the closed form, in which work-hardening behavior, rate-dependent contribution and inertial effects are taken into account. Meanwhile, a plate impact test is performed for simulating the dynamic fracture process in LY12 aluminum alloy. The damage model is incorporated in a hydrodynamic computer code, to simulate the first few stress reverberations in the target as it spalls and postimpact porosity in the specimen. Fair agreement between computed and experimental results is obtained. Numerical analysis shows that the influence of inertial resistance on the initial void growth in the case of high loading rate can not be neglected. It is also indicated that the dynamic growth of voids is highly sensitive to the strain rates.
类目[WOS]	Mechanics
研究领域[WOS]	Mechanics
关键词[WOS]	FRACTURE ; DUCTILE ; COPPER
收录类别	SCI
语种	英语
WOS记录号	WOS:A1995TJ14700009
公开日期	2009-08-03 ; 2010-08-20
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/39176]
专题	力学研究所_力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Zheng J,Wang ZP. Dynamic damage and failure in viscoplastic materials[J]. Engineering Fracture Mechanics,1995,52(6):1065-&.
APA	郑坚,&Wang ZP.(1995).Dynamic damage and failure in viscoplastic materials.Engineering Fracture Mechanics,52(6),1065-&.
MLA	郑坚,et al."Dynamic damage and failure in viscoplastic materials".Engineering Fracture Mechanics 52.6(1995):1065-&.