以含内变量的不可逆热力学基本原理,最小强度原理、正交性流动法则,以及Hill所定义的有效应力等为基础,引入含内损伤变量的比自由能和塑性势,建立了正交各向异性韧性材料的损伤模型和损伤演化方程。并用正交各向异性板材破坏成形的实验数据对本文所建立的损伤演化方程作了验证,结果表明,该模型和损伤演化方程是合理的。 Based on the basic principle of irreversible thermodynamics with internal variables, the principle of minimum intensity, the law of orthogonality and the effective stress defined by Hill, the specific free energy and plastic potential of the variables with internal damage were introduced to establish the orthogonal Damage Model and Damage Evolution Equation of Heterosexual Toughness Materials. The damage evolution equations established in this paper are validated by the experimental data of the failure of the orthotropic sheet. The results show that the model and the damage evolution equation are reasonable.