Plasticity and metal forming

At the end of this learning unit, the student is able to :

• LO1.1, LO1.2, LO1.3
• LO2.1, LO2.2, LO2.4
• LO5.3, 5.4, 5.6

• LO1.1. Explain the fundamental assumptions underlying several continuum plasticity theories (J2 deformation theory, yield surface, normality rule, J2 flow theory, anisotropic extensions, etc) and single crystal theory (e.g. Schmidt rule);
• LO1.1. Explain and identify the key technological and scientific issues in the most important forming operations: rolling, deep drawing, extrusion, wire drawing, forging.
• LO1.1. Describe how metal forming operations are affected by a few important phenomena including: plastic localization, damage, internal stresses, texture development, plastic anisotropy, contact and wear, high temperature microstructure evolution;
• LO1.2. and 1.3. Calculate, analytically, the evolution of stress and strain in plastically deforming samples/crystals under homogenous loading;
• LO1.2, 2.1, 2.2, 2.4. Use a commercial finite element code to simulate forming operations based on existing input files that can be modified to test different conditions/parameters;
• LO1.3, 2.2. Critically assess/compare numerical results to analytical model and make links with technological issues;
• LO5.3, 5.4, 5.6. Report (writing and oral) on a study based on finite element simulations of a forming operation involving a discussion on technological issues that can be addressed with the simulations and on the assessment of the analytical models.