Abstract
A simple estimation method of equivalent porosity and strength of scrapped aluminum die-casting floor panel is suggested in which various defects like pores can be allowed. During shop practice of processing die-casting parts, equivalent porosity is evaluated by the ratio of linear stiffness from the simple test to the analytical stiffness value. Porosity equation is derived from the inclusion theory. Then using Mori-Tanaka method the porosity value is used to find an elasto-plastic stress-strain curve for the porous material. In this paper Hollomon equation is used to describe the strain hardening effect of the die-casting material. Finally, the stress-strain curve for the porous material is used to calculate strength of die-casting part that captures the nonlinearity of the porous material. A facility die-casting floor panel is chosen to verify the proposed method. The result is accurate and adequate to the test result.
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This work is supported by a Research Grant of 2019 Hannam University, Korea.
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Recommended by Associate Editor Nam-Su Huh
Moon Shik Park received his B.S. degree (1987) from Hanyang University, and his M.S. (1989) and Ph.D. (1994) from Korea Advanced Institute of Science and Technology. He worked for Daewoo Heavy Industries and Boeing Commercial Airplane Group as an airplane structural engineer and designer. He was also the Dean of College of General Education and is currently a Professor in the Department of Mechanical Engineering at Hannam University, Korea. His research interests include computational structural mechanics for design and analysis.
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Park, M.S. In situ estimation of equivalent porosity and strength of aluminum die-casting floor panel by simple loading test and finite element method. J Mech Sci Technol 33, 4191–4197 (2019). https://doi.org/10.1007/s12206-019-0814-z
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DOI: https://doi.org/10.1007/s12206-019-0814-z