Welding Deformation and Residual Stress Prevention

Ninshu Ma received his doctoral degree in Engineering from Osaka University in 1994 and then worked for 21 years as a professional consultant in the field of computer-aided engineering at Japan Research Institute. He’s currently a professor at Joining and Welding Research Institute, Osaka University. His research focuses on the development of computing methods and their FEM software for analysis of multi-physical phenomena in joining and forming processes. Recent work has centered on thermal-mechanical coupling analysis on various joining processes of dissimilar materials as well as additive manufacturing processes and the assessment of structural components.

Preface 1. Introduction to welding mechanics 2. Measurement and prediction of residual stresses by inherent strain method3. Basic knowledge on simulation analysis for welding thermal process, stress and deformation4. Basic Concept of Finite Element Method5. Questions and Answers of attached FEM programs6. Experience simulation using attached FEM programs 7. Simulation Analysis of welding stresses and deformation for manufacturing problems Appendix A Tables and figures of welding residual stresses in various welded joints Appendix B Temperature dependent material properties and samples for FEM simulation Appendix C Three dimensional mathematical equations for thermal elastic plastic creep phenomena