Numerical Simulation on Solidification and Thermal Stress of Continuous Casting Billet in Mold based on Meshless Methods

摘要

An integrated meshless thermal-mechanical analysis system is developed based a meshless solidification model with Finite Point Method (FPM) and the Meshless Local Petrov-Galerkin (MLPG) method in the thermal elastic-plastic analysis model. The system is applied to simulate the solidification process and the thermal stress of continuous casting billet in mold. The results were consistent with the measurement and well explained the characteristics of stress and strain distribution and the formation mechanism of the off-corner defects. The computational accuracy was as good as when FEM was used, while taking advantage of rapid computation as well as flexible and dynamic node distribution. These observations show that meshless method could be a potent numerical analysis tool for the study of continuous casting processes.