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김영석(Youngsuk Kim),김기수(Kisoo Kim),권남철(Namchul Kwon) 한국자동차공학회 1993 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Press formabilities of aluminum sheets for automobile body were investigated. plane strain stretching test (PSST), cupping test and U bending test were performed to assess the press formability of aluminum sheets respectively. The results showed that aluminum sheets are generally inferior to cold-rolled steel sheet of deep drawing quality (CSP3N) in press formability. The limiting punch height (LPH) and limiting plane strain (FLCl) of aluminum sheets are 50%-70% level compared to that of CSP3N. Moreover, the limiting drawing ratios (LDR) of aluminum sheets are ranged between 1.95 and 2.1. The poor press formability of aluminum sheets is responsible for low valuse of total elongation and plastic anisotropy parameter in tensile characteristic. The shape fixability of aluminum sheets evaluated in Ubending test is very poor 엳 새 its low elastic modulus compared to CSP3N. Kew words: press formability, plane strain stretching test,, aluminum sheet, Shape fixability <br/>