基于蠕变疲劳预测模型的涡轮叶片疲劳试验与数值研究

IF 1.5 4区材料科学 Q3 ENGINEERING, MECHANICAL

Journal of Engineering Materials and Technology-transactions of The Asme Pub Date : 2022-01-21 DOI:10.1115/1.4053617

Debin Sun, J. Huo, Shaoxia An

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引用次数: 0

摘要

为了准确预测材料的蠕变疲劳寿命，本文首次提出了基于Kachanov蠕变损伤模型的实时蠕变损伤预测模型;其次，结合Chaboche疲劳损伤模型和连续损伤力学的非线性耦合机理，提出了材料蠕变疲劳寿命预测模型;最后，通过DZ125的试验数据验证了蠕变疲劳寿命模型的有效性，预测结果在±2.0的离散范围内，然后计算涡轮叶片的蠕变疲劳寿命，与叶片试件的试验结果进行对比，进一步证明了模型的实用性，误差约为3.2%，为涡轮叶片的损伤预测、耐久性分析和寿命预测提供理论参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Experimental and Numerical Study of Turbine Blade Fatigue Based on a Creep-fatigue Prediction Model

To scrupulously predict the creep-fatigue life of materials, a creep life prediction model is firstly proposed in this study considering real-time creep damage derived from the Kachanov creep damage model; secondly, combined with the Chaboche fatigue damage model and the nonlinear coupling mechanism of continuous damage mechanics, a creep-fatigue life prediction model of material is ulteriorly presented in this paper; finally, the effectiveness of the creep-fatigue life model is corroborated by experiment data of DZ125, whose prediction results are in the ±2.0 dispersion zone and then the creep-fatigue life of the turbine blade is calculated to compare with the experimental results of the blade specimen to further prove the practicability, whose error is about 3.2%, which can provide a theoretical reference for the damage prediction, durability analysis, and life prediction of the turbine blade.

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来源期刊

Journal of Engineering Materials and Technology-transactions of The Asme 工程技术-材料科学：综合

CiteScore

3.00

自引率

0.00%

发文量

审稿时长

4.5 months

期刊介绍： Multiscale characterization, modeling, and experiments; High-temperature creep, fatigue, and fracture; Elastic-plastic behavior; Environmental effects on material response, constitutive relations, materials processing, and microstructure mechanical property relationships