Prediction of fatigue crack propagation life driven by residual stress field in gas turbine blades

Prediction of fatigue crack propagation life driven by residual stress field in gas turbine blades | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL This is a preprint and has not been peer reviewed. Data may be preliminary. 9 June 2025 V1 Latest version Share on Prediction of fatigue crack propagation life driven by residual stress field in gas turbine blades Authors : Yongqiang Wang , Jian Chen , Qing Du , and Peijun Wei [email protected] Authors Info & Affiliations https://doi.org/10.22541/au.174945080.02892468/v1 246 views 164 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Accurate prediction of fatigue crack growth life of gas turbine blades under out-of-phase thermo-mechanical fatigue loading is of significance for safeguarding its structural integrity. In this study, a finite element analysis framework, integrating ANSYS and FRANC3D for joint simulation, is proposed to tackle the issue of residual stress-driven crack propagation in the “hot spot” of the turbine blade. Initially, a sequential thermal-structural coupling analysis of crack-free blade is conducted in ANSYS to accurately quantifies residual stresses induced by creep relaxation during thermal cycling. Subsequently, semi-elliptical initial cracks with specific width-to-depth ratios are introduced in the regions of large residual stresses, and the crack propagation process is numerically simulated based on linear elastic fracture mechanics and the Paris model using FRANC3D. It is discovered that the width-to-depth ratio of initial crack significantly influences the fatigue crack growth prediction life, 23.86% reduction in lifetime at compared to . Moreover, a critical crack depth of approximately 12 mm is obtained when rapid unstable fracture occurs. The research provides a vital theoretical foundation and technical support for the fatigue life prediction and structural optimization of gas turbine blades, thereby contributing to the enhancement of the safety and reliability of gas turbine operations. Supplementary Material File (manuscript.docx) Download 17.64 MB Information & Authors Information Version history V1 Version 1 09 June 2025 Copyright This work is licensed under a Non Exclusive No Reuse License. Keywords creep and relaxation fatigue crack growth finite element method residual stress thermo-mechanical fatigue turbine blade component Authors Affiliations Yongqiang Wang University of Science and Technology Beijing Department of Applied Mechanics View all articles by this author Jian Chen SPIC China United Gas Turbine Technology Corporation Limited View all articles by this author Qing Du SPIC China United Gas Turbine Technology Corporation Limited View all articles by this author Peijun Wei [email protected] University of Science and Technology Beijing Department of Applied Mechanics View all articles by this author Metrics & Citations Metrics Article Usage 246 views 164 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Yongqiang Wang, Jian Chen, Qing Du, et al. Prediction of fatigue crack propagation life driven by residual stress field in gas turbine blades. Authorea . 09 June 2025. 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