Comparison of some nite element methods for solving 3D heat transfer problems
Application to hot forming process simulation
Keywords:
solving unsteady thermal problem, thermal shock,, mixed formulation, nite element, linear interpolation, implicit scheme, thermomechanical coupling,, hot forming process.Abstract
The thermal analysis using standard linear tetrahedral nite elements may be severely affected by spurious local extrema in the regions affected by thermal shocks; conceivably discouraging the use of such elements as a result. The present work proposes three numerical models based on the mixed temperature/heat ux formulation to solve the unsteady thermal problem. Our new model, called the Mixed continuous formulation, should allow to improve the thermomechanical coupling effects during the simulation of
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