Ideal sheet forming with frictional constraints |
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| Institution: | 1. School of Materials Science and Engineering, Seoul National University, 56-1, Shinlim-dong, Kwanak-ku, Seoul 151-742, South Korea;2. LG Production Engineering Research Center, LG Electronics, 19-1 Cheongho-ri, Jinwuy-myun, Pyungtaek-si, Kyunggi-do, 451-713, South Korea;3. Alcoa Technical Center, 100 Technical Drive, Alcoa Center, PA 15069, USA;1. Department of Orthopaedics, Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China;2. Department of Orthopaedics, The Second Affiliated Hospital of Nantong University, Nantong, Jiangsu Province, China;1. Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic, Rochester, MN 55902, USA;2. Department of Radiation Oncology, Mayo Clinic School of Graduate Medical Education, Mayo Clinic, Rochester, MN 55902, USA;3. Department of Orthopedic Surgery, Mayo Clinic School of Graduate Medical Education, Mayo Clinic, Rochester, MN 55902, USA;4. Program of Cellular and Molecular Biology, Institute of Biomedical Sciences (ICBM), Faculty of Medicine and Millennium Institute on Immunology and Immunotherapy, University of Chile, Santiago, Chile;5. Department of Biomedical Engineering and Physiology, Mayo Clinic Graduate School of Biomedical Sciences, Mayo Clinic, Rochester, MN 55902, USA;1. Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, China;2. Department of Cardiology, The First Affiliated Hospital of Jinan University, Guangzhou 510630, China;3. Analytical and Testing Center, Jinan University, Guangzhou 510632, China;4. State Key Laboratory of Quality Research in Chinese Medicines, Macau University of Science and Technology, Macau 999078, China;5. Department of Respiratory Medicine, Affiliated Hospital of Guangdong Medical University, Zhanjiang 524001, China;6. Department of Respiratory Medicine, The First Affiliated Hospital of Jinan University, Guangzhou 510630, China;1. Department of Clinical Innovative Medicine, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, Kyoto 606-8507, Japan;2. Department of Neurosurgery, Kyoto University Graduate School of Medicine, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, Kyoto 606-8507, Japan;3. Research Fellow of Japan Society for the Promotion of Science, Kojimachi Business Center Building, 5-3-1 Kojimachi, Chiyoda-ku, Tokyo 102-0083, Japan |
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| Abstract: | The ideal forming theory, previously developed as a direct design method to guide iterative design practices based on analytic methods, does not properly account for frictional effects prevalent in real forming. A method for introducing the effects of the Coulomb friction in the ideal sheet forming theory was developed in this work by modifying the extremum work criterion. For numerical implementation, a rigid-plastic finite element method was used based on triangular membrane elements. Computational results were compared with experiments given in NUMISHEET'93 using a planar anisotropic strain rate potential proposed by Barlat et al. (Barlat, F., Chung, K., Richmond, O., 1993. Strain rate potential for metals and its application to minimum plastic work path calculations. Int. J. Plasticity 9, 51.) and the Coulomb friction model. |
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