Investigation of the strain distribution with lubrication during the deep drawing process |
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| Authors: | TS Yang |
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| Affiliation: | 1. Department of Mechanical Engineering, Michigan State University, 2241, Engineering Building, East Lansing, MI 48824, USA;2. General Motors Research & Development Center, Mail Code: 480-106-224, 30500, Mound Road, Warren, MI 48090, USA;1. Mechanical Engineering Department MANIT Bhopal (M.P.), 462051, India;2. Mechanical Department MANIT Bhopal (M.P.), 462051, India;1. CEMUC, Department of Mechanical Engineering, University of Coimbra, Polo II, Rua Luís Reis Santos, Pinhal de Marrocos, 3030-788 Coimbra, Portugal;2. CT2M, Department of Mechanical Engineering, University of Minho, Campus de Azurém, 4800-058 Guimarães, Portugal;1. School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, 350116, Fujian, China;2. Department of Mechanical Engineering, University of Aveiro, Aveiro, 3810-193, Portugal;1. Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, China;2. State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China;3. State Grid Key Laboratory of High-Voltage Field-Test Technique, Hubei Electric Power Research Institute, Wuhan 430077, China |
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| Abstract: | A lubrication/friction model can be implemented in FEM codes to predict the contact area ratio, friction coefficient and strain distribution in lubricated deep drawing process. In the lubrication analysis, the surface roughness effect on lubrication flow is included by using Wilson and Marsault's average Reynolds equation that is appropriated for mixed lubrication with severe asperity contact. With regard to the asperity contact theory, the well-known flattening effect is considered. Friction is expressed in terms of variables such as lubricant film thickness, sheet roughness, lubricant viscosity, interface pressure, sliding speed, and strain rate. The proposed lubrication/friction model combined with a finite element code of deep drawing process to predict the contact area ratio, friction coefficient and strain distribution. Numerical results showed that the present analysis provides a good agreement with the measured strain distributions. |
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