Knowledge Management System of Institue of Mechanics, CAS
| Thermal stress wave and spallation induced by an electron beam | |
Zhou YC(周益春); Duan ZP(段祝平) ; Yan XH; Zhou, YC (reprint author), CHINESE ACAD SCI,LAB LASER & DYNAM BEHAV MAT INST MECH,BEIJING 100080,PEOPLES R CHINA.
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| Source Publication | International Journal of Impact Engineering
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| 1997 | |
| Volume | 19Issue:7Pages:603-614 |
| ISSN | 0734-743X |
| Abstract | 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. |
| Keyword | Thermal Stress Wave Spallation Electron Beam Energy Deposition Constitutive Model Porous Plastic Solids Ductile Deformation Fracture Localization Simulation Growth Voids |
| DOI | 10.1016/S0734-743X(96)00048-6 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:A1997YB80300003 |
| WOS Keyword | POROUS PLASTIC SOLIDS ; DUCTILE ; DEFORMATION ; FRACTURE ; LOCALIZATION ; SIMULATION ; GROWTH ; VOIDS |
| WOS Research Area | Engineering ; Mechanics |
| WOS Subject | Engineering, Mechanical ; Mechanics |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/38986 |
| Collection | 力学所知识产出(1956-2008) |
| Corresponding Author | Zhou, YC (reprint author), CHINESE ACAD SCI,LAB LASER & DYNAM BEHAV MAT INST MECH,BEIJING 100080,PEOPLES R CHINA. |
| Recommended Citation GB/T 7714 | Zhou YC,Duan ZP,Yan XH,et al. 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,&Zhou, YC .(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. |
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