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在镍基高温合金 Udimet72 0 Li的单调拉伸、对称循环加载和蠕变实验数据的基础上 ,开展了应用 Bodner-Partom统一粘塑性本构理论对这三类载荷条件下材料的力学行为进行同时建模的研究。通过仔细分析方程的本构特征 ,提出了一种根据单轴实验获得本构参数的系统优化策略 ,然后将 B-P模型编入 ABAQUS的材料子程序 UMAT,计算了 70 0℃时不同加载情况下材料的非弹性变形 ,并与实验结果进行了对比 ,获得了良好的一致性。
Based on the experimental data of monotonic stretching, symmetric cyclic loading and creep of nickel-based superalloy Udimet72 0 Li, the Bodner-Partom visco-plastic constitutive theory was applied to simulate the mechanical behavior of the material under the three loading conditions Modeling research. By careful analysis of the constitutive characteristics of the equation, a system optimization strategy based on uniaxial experiments was proposed. Then, the BP model was programmed into the ABAQUS material subroutine UMAT, and the material was calculated under different loading conditions Of the non-elastic deformation, and compared with the experimental results, obtained a good consistency.