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RIGID-PLASTIC/RIGID-VISCOPLASTIC FEM BASED
ON LINEAR
PROGRAMMING-THEORETICAL
MODELING AND APPLICATION FOR
AXISYMMETRICAL
PROBLEMS
Xu Weili Shi Xiangchen Lin Zhongqin
School of Mechanical Engineering, Shanghai Jiaotong
University
Peter Thomson
Australia Monash University
Di Senglin
Australia University of Technology
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Abstract: Compared
with the traditional rigid-plastic/rigid-viscoplastic (RP/RVP)
FEM (based on iteration solution), RP/RVP FEM based on linear
programming (LP) has some remarkable advantages, such as it 's
free of convergence problem and its convenience in contact,
rigid zone, and friction force treatment. The numerical model of
RP/RVP FEM based on LP for axisymmetrical metal forming
simulation is studied, and some related key factors and its
treatment methods in formulation of constraint condition are
proposed. Some solution examples are provided to validate its
accuracy and efficiency.
Key words: Rigid-plastic/rigid-viscoplastic
FEM Contact treatment Linear programming
Manuscript
received on September 15, 2000; revised manuscript December 20, 2000
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