Deformation and Formability of Aluminium Sheet Alloys

题目：Deformation and Formability of Aluminium Sheet Alloys

报告人：加拿大麦克马斯特大学（McMaster University）吴沛东教授

时间：2018年5月29日10:00-12:00

地点：综合1号实验楼602

摘要： We start with listing limits to sheet metal forming. We then very briefly summarize the past and current research projects aiming for understanding these limits. We proceed by demonstrating how crystal plasticity theory can be applied to study sheet metal formability. Finally, the effect of the cube texture on sheet metal formability is investigated as an example. It is found that, while the ideal cube texture decreases formability, a spread about cube significantly delays the initiation of localized necking when a sheet undergoes biaxial tension. The effect of the cube texture on the predicted Forming Limit Diagrams (FLDs) is discussed in terms of the sharpness of the yield locus near equi-biaxial tension.

报告人简介：

Peidong Wu

Department of Mechanical Engineering, McMaster University, Hamilton, Ontario, Canada.

Phone: 1 905 525 9140 (x20092); e-mail: peidong@mcmaster.ca

Peidong Wu is Professor in the Department of Mechanical Engineering, McMaster University, Canada. He got his B.Sc., M.Sc. and Ph.D. from Zhejiang University, China University of Mining and Technology, and Delft University of Technology, respectively. In 1994, he was awarded the prestigious Canada International Fellowship by NSERC to conduct research work at the University of Sherbrooke. In 1997, he joined Alcan International Limited, Research & Development Centre, where he became a Technical Leader in 2001. Dr. Wu joined McMaster University in 2006.

Since 1982, Dr. Wu has been working in the field of the mechanics of engineering materials and composites, especially in the constitutive modeling of large deformation of polymeric materials and polycrystalline metals. Together with Professor Erik van der Giessen, they developed a non-Gaussian full network model for rubber elasticity. At Sherbrooke and Alcan, Dr. Wu’s research focused on sheet metal forming, including formability, bendability and roping of aluminum sheets. At McMaster, Dr. Wu and his students developed a finite strain Elastic-Viscoplastic Self-Consistent (EVPSC) model for polycrystalline materials, and a new Twinning and De-Twinning (TDT) model for HCP materials including magnesium alloys. In 2009, he was awarded the International Journal of Plasticity Medal for excellent contributions to the field of plasticity, especially to the areas of constitutive modeling and metal forming. In 2011, he received the NSERC Discovery Acceleration Supplement.