This paper deals with the creep characteristics of the aircraft turbine disc material of nickel-base superalloy GH4169 under high temperature. From the perspective of continuum damage mechanics, a new creep life prediction model is proposed to predict the creep life of metallic materials under both uniaxial and multiaxial stress states. The creep test data of GH4169 under different loading conditions are used to demonstrate the proposed model. Moreover, from the perspective of numerical simulation, the test data with analysis results obtained by using the finite element analysis based on Graham creep model is carried out for comparison. The results show that numerical analysis results are in good agreement with experimental data. By incorporating the numerical analysis and continuum damage mechanics, it provides an effective way to accurately describe the creep damage process of GH4169.

中文翻译：

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基于连续损伤力学的飞机涡轮盘合金蠕变寿命预测

本文研究了镍基高温合金GH4169飞机涡轮盘材料在高温下的蠕变特性。从连续损伤力学的角度出发，提出了一种新的蠕变寿命预测模型，用于预测金属材料在单轴和多轴应力状态下的蠕变寿命。GH4169在不同载荷条件下的蠕变测试数据被用来证明所提出的模型。此外，从数值模拟的角度出发，将测试数据与通过基于Graham蠕变模型的有限元分析获得的分析结果进行比较。结果表明，数值分析结果与实验数据吻合良好。通过结合数值分析和连续损伤机制，