Thermal stress wave and spallation induced by an electron beam

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	Thermal stress wave and spallation induced by an electron beam
	Zhou YC(周益春); Duan ZP(段祝平); Yan XH
刊名	International Journal of Impact Engineering
	1997
卷号	19 期号:7 页码:603-614
关键词	Thermal Stress Wave Spallation Electron Beam Energy Deposition Constitutive Model Porous Plastic Solids Ductile Deformation Fracture Localization Simulation Growth Voids
ISSN号	0734-743X
通讯作者	Zhou, YC (reprint author), CHINESE ACAD SCI,LAB LASER & DYNAM BEHAV MAT INST MECH,BEIJING 100080,PEOPLES R CHINA.
中文摘要	Thermal stress wave and spallation in aluminium alloy exposed to a high fluency and low energy electron beams are studied theoretically. A simple model for the study of energy deposition of electrons in materials is presented on the basis of some empirical formulae. Under the stress wave induced by energy deposition, microcracks and/or microvoids may appear in target materials, and in this case, the inelastic volume deformation should not vanish. The viscoplastic model proposed by Bodner and Partom with corresponding Gurson's yield function requires modification for this situation. The new constitutive model contains a scalar field variable description of the material damage which is taken as the void volume fraction of the polycrystalline material. Incorporation of the damage parameter permits description of rate-dependent, compressible, inelastic deformation and ductile fracture. The melting phenomenon has been observed in the experiment, therefore one needs to take into account the melting process in the intermediate energy deposition range. A three-phase equation of state used in the paper provides a more detailed and thermodynamical description of metals, particularly, in the melting region. The computational results based on the suggested model are compared with the experimental test for aluminium alloy, which is subjected to a pulsed electron beam with high fluency and low energy. (C) 1997 Elsevier Science Ltd.
类目[WOS]	Engineering, Mechanical ; Mechanics
研究领域[WOS]	Engineering ; Mechanics
关键词[WOS]	POROUS PLASTIC SOLIDS ; DUCTILE ; DEFORMATION ; FRACTURE ; LOCALIZATION ; SIMULATION ; GROWTH ; VOIDS
收录类别	SCI
语种	英语
WOS记录号	WOS:A1997YB80300003
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/311007/38986]
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	Zhou YC,Duan ZP,Yan XH. Thermal stress wave and spallation induced by an electron beam[J]. International Journal of Impact Engineering,1997,19(7):603-614.
APA	周益春,段祝平,&Yan XH.(1997).Thermal stress wave and spallation induced by an electron beam.International Journal of Impact Engineering,19(7),603-614.
MLA	周益春,et al."Thermal stress wave and spallation induced by an electron beam".International Journal of Impact Engineering 19.7(1997):603-614.