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논문 기본 정보

자료유형
학술저널
저자정보
Young-Suk Kim (Kyungpook National University) Seok-Hwan Oh (Kyungpook National University) Van-Cuong Do (Kyungpook National University) Bong-Hyun Lee (Korea Automotive Technology Institute)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.22 No.6
발행연도
2016.1
수록면
974 - 981 (8page)

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초록· 키워드

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3D-structured (embossed) aluminium sheets have been used as heat insulation materials in automotive exhaustparts because the embossments on the sheets increase the surface area and reinforce the stiffness of exhaustcomponents. Unlike the press-forming process for flat (non-embossed) sheets, however, that for embossedaluminium sheets is constrained by many restrictions given the distinct mechanical properties and geometric3D shape of the latter. In designing sheet-stamping tools, manufacturers have recently used CAE technologiesbased on finite element analysis. Guaranteeing the effectiveness of CAE technologies necessitatesinformation about the plastic yield criterion, which is determined primarily by performing a biaxial tensile teston cruciform-shaped specimens. We measured the yield locus of an embossed aluminium 3004-P sheet byusing the camera vision method instead of strain gauge measurement because of the difficulty in attachinga strain gauge to the central region of the aluminium body. The measured yield locus of the studied sheet showsthat its yield stress in equi-biaxial stress is smaller than the flat sheet yield locus measured by the strain gaugemethod. The shape of the yield locus of the embossed aluminium sheet also adequately corresponds withLogan-Hosford anisotropic yield function.

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