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根据三维有限元理论，把连续升温的温度场迭加到热应力的计算中，为了计算坯体热应力，对各种不同的生坯在不同的温度下进行了力学参数的测定，分别测试了试样的热膨胀收缩率、弹性模量及强度随温度变化的关系。以面砖和电瓷生坯为例，计算了不同条件下的热应力场。根据第一强度理论及热形变的概念，定义了最大无因次热载荷和坯体最大当量热变形两个新概念。分别以坯体内最大热压应力、坯体内最大热张应力、最大无因次热载荷以及坯体最大当量热变形作为标识，对所计算的热应力场进行了整理。结果表明：坯体内最大热应力在任何时刻总是出现在坯体表面边缘转用处；最大无因次热载荷与坯体最大当量热变形之间曲线形态有着很多相关关系，可以用坯体最大当量热变形来近似推测最大无因次热载荷的变化情况。
According to the three-dimensional finite element theory, the temperature field of continuous heating was added to the calculation of thermal stress. In order to calculate the thermal stress of the green body, the mechanical parameters of the various green bodies were measured at different temperatures. Thermal Expansion Shrinkage, Modulus of Elasticity and Intensity with Temperature. Taking brick and porcelain as examples, the thermal stress field under different conditions was calculated. According to the first strength theory and the concept of thermal deformation, two new concepts of maximum dimensionless thermal load and maximum equivalent thermal deformation of the blank are defined. The calculated thermal stress fields are respectively sorted by the maximum hot compressive stress in the billet, the maximum thermal stress in the billet, the maximum dimensionless thermal load and the maximum equivalent thermal deformation of the billet. The results show that the maximum thermal stress in the billet always appears at the edge of the billet surface at any time. There is a large correlation between the maximum dimensionless thermal load and the curve of the maximum equivalent thermal deformation of the billet. The maximum equivalent stress Hot deformation to approximate the maximum non-dimensional heat load changes.