Two Dimensional boundary Element Analysis of Metal Extrusion

• Main Author: 池文貴
• Other Authors: 施延欣
• Format: Others
• Language: en_US
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/91917420907848844364

碩士 === 中原大學 === 機械工程學系 === 85 === 　　In this analysis the plane strain extrusion problem is studied by applied boundary element method (BEM). The equilibrium equation is derived by Betti's reciprocal theorem. The boundary element formulations for visco-plastic problems involving large strains and rotations are considered. An update Lagrangian approach is adopted for BEM analysis. Anand's and Li's constitutive models, which encounter the temperature and non-elastic strain rate are applied. In this analysis the stress, velocity and velocity gradient distributions are determined. The effects of piston velocity, prescribed stress and temperature on extrusion process considered. Results of Li's and Anand's model are provided and discussed.