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建立了铸件凝固过程热应力模拟的三维流变学本构方程及其有限元算法和基于流变学模型的ＦＤＭ／ＦＥＭ 集成的三维应力应变分析系统。对带热节的铸钢试件在不同约束条件、不同浇注温度、砂型初始温度及受阻长度等情况下进行了数值模拟，进而研究了这些因素对热裂趋势的影响。研究结果表明粘塑性应变是热裂产生的主要因素。
The three-dimensional rheological constitutive equation of the thermal stress simulation of the casting solidification process and its finite element method and the three-dimensional stress and strain analysis system based on the rheological model FDM / FEM integration are established. The cast steel specimens with hot joints were numerically simulated under different constraints, different pouring temperatures, initial sand temperature and hindered length, and then the effects of these factors on hot cracking tendency were studied. The results show that viscoplastic strain is the main factor of thermal cracking.