NUMERICAL
SIMULATION OF METAL FORMING PROCESSES BY CORRECTED SMOOTH PARTICLE
HYDRODYNAMICS MESHLESS METHODS
LI Changsheng1 LIU
Xianghua1 XIONG Shangwu2 MARTINS Paulo António
Firme3
(1. State Key Laboratory of Rolling
and Automation, Northeastern University, Shenyang 110004;
2. Department of Mechanical
Engineering, Northwe-stern University, 60208 Evanston, IL, U.S.A.;
3. Departamento de Engenharia
Mecânica,Instituto Superior Técnico, 1049-001 Lisboa, Portugal)
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Abstract: Based
on the flow formulation of slightly compressible rigid plastic materials
a code of bar and rod plane-strain upsetting in metal forming is
developed, in which corrected smooth particle hydrodynamics (CSPH)
meshless method is employed. A simple method to smoothing technique of
calculating volume strain rate is proposed to improve the calculating of
stress field. The results of velocity field and stress field by CSPH,
finite element method and experiment of pure commercial aluminum and
Al6060 materials upsetting are analyzed. It is shown that the large
deformation in metal forming processes can be solved by CSPH. The method
of the CSPH will be a good measure to solve the complicated metal
forming further.
Key words:Metal
forming Meshless method Finite element method Numerical
simulation
CLC No: TG301
国家自然科学基金(50534020)和上海宝钢资助项目.
Received 20050602, received in revised form 20060227
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