期刊
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
卷 209, 期 14, 页码 5443-5447出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2009.04.020
关键词
Sheet metal forming; Forming limit; Ductile fracture criterion; FE simulation
To predict accurately the forming limit in sheet metal forming, the combination of FE simulation with tension tests is adopted in this paper to determine the material constants p and C in a ductile fracture criterion (DFC), which is advanced by the author. Forming limits of bore-expanding, hemispherical punch bulging and deep drawing (cylindrical, square-cup parts) are predicted by means of the DFC. Comparison of the results predicted by the DFC with experimental values shows that the precision of forming limit predicted by material constants obtained by the combination method is more accurate than that predicted by material constants obtained by the tension method, and that the critical punch stoke and the fracture initiation position in forming processes above mentioned are predicted accurately by the DFC. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.
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