An engineering-applicable stress-life model for dovetail joints incorporating leading-edge stress gradient and micro-slip effects

IF 6.8 2区材料科学 Q1 ENGINEERING, MECHANICAL

International Journal of Fatigue Pub Date : 2025-09-08 DOI:10.1016/j.ijfatigue.2025.109271

Tianxing Chai, Dasheng Wei, Xiyuan Zhang, Xiang Liu, Xinyu Pu, Shun Yang

{"title":"An engineering-applicable stress-life model for dovetail joints incorporating leading-edge stress gradient and micro-slip effects","authors":"Tianxing Chai, Dasheng Wei, Xiyuan Zhang, Xiang Liu, Xinyu Pu, Shun Yang","doi":"10.1016/j.ijfatigue.2025.109271","DOIUrl":null,"url":null,"abstract":"<div><div>This study focuses on TC4 titanium alloy dovetail joints and proposes a life assessment method that incorporates both stress gradient and fretting slip effects. The research begins with the design of specialized fretting fatigue test specimens to investigate the coupled phenomena of fretting fatigue and wear. Numerical simulations based on the dovetail contact configuration are then conducted to thoroughly analyze the stress distribution characteristics and their dynamic variations at the contact leading edge. To address the unique stress distribution features at the contact leading edge, the study develops a simplified method for rapid determination of the critical distance with gradient modification. This leads to the establishment of a stress-life model that simultaneously considers both the stress gradient and micro-slip amplitude at the contact leading edge. In addition, compared with the elastoplastic analysis, this life prediction model also has good accuracy under pure elastic finite element analysis, which is very convenient for engineering application. The proposed model demonstrates several advantages, including minimal fitting parameters, clear physical interpretation of fretting damage parameters, and improved prediction accuracy. Experimental validation shows that 90% of the predicted results fall within a 1.5x scatter band, significantly enhancing the accuracy of fretting fatigue life prediction and engineering applicability for dovetail joints.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"203 ","pages":"Article 109271"},"PeriodicalIF":6.8000,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Fatigue","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0142112325004682","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}

引用次数: 0

Abstract

This study focuses on TC4 titanium alloy dovetail joints and proposes a life assessment method that incorporates both stress gradient and fretting slip effects. The research begins with the design of specialized fretting fatigue test specimens to investigate the coupled phenomena of fretting fatigue and wear. Numerical simulations based on the dovetail contact configuration are then conducted to thoroughly analyze the stress distribution characteristics and their dynamic variations at the contact leading edge. To address the unique stress distribution features at the contact leading edge, the study develops a simplified method for rapid determination of the critical distance with gradient modification. This leads to the establishment of a stress-life model that simultaneously considers both the stress gradient and micro-slip amplitude at the contact leading edge. In addition, compared with the elastoplastic analysis, this life prediction model also has good accuracy under pure elastic finite element analysis, which is very convenient for engineering application. The proposed model demonstrates several advantages, including minimal fitting parameters, clear physical interpretation of fretting damage parameters, and improved prediction accuracy. Experimental validation shows that 90% of the predicted results fall within a 1.5x scatter band, significantly enhancing the accuracy of fretting fatigue life prediction and engineering applicability for dovetail joints.

查看原文本刊更多论文

考虑前缘应力梯度和微滑移效应的燕尾接头工程应用应力寿命模型

以TC4钛合金燕尾接头为研究对象，提出了一种同时考虑应力梯度和微动滑移效应的寿命评估方法。本研究从设计微动疲劳专用试样入手，研究微动疲劳与磨损的耦合现象。基于燕尾接触形态进行了数值模拟，深入分析了接触前缘的应力分布特征及其动态变化。针对接触面前缘独特的应力分布特征，提出了一种基于梯度修正的快速确定临界距离的简化方法。由此建立了同时考虑接触前缘应力梯度和微滑移幅值的应力-寿命模型。此外，与弹塑性分析相比，该寿命预测模型在纯弹性有限元分析下也具有很好的精度，非常便于工程应用。该模型具有拟合参数最小、对微动损伤参数的物理解释清晰、预测精度提高等优点。实验验证表明，预测结果90%落在1.5倍的散射带内，显著提高了燕尾接头微动疲劳寿命预测的精度和工程适用性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

International Journal of Fatigue 工程技术-材料科学：综合

CiteScore

10.70

自引率

21.70%

发文量

619

审稿时长

58 days

期刊介绍： Typical subjects discussed in International Journal of Fatigue address: Novel fatigue testing and characterization methods (new kinds of fatigue tests, critical evaluation of existing methods, in situ measurement of fatigue degradation, non-contact field measurements) Multiaxial fatigue and complex loading effects of materials and structures, exploring state-of-the-art concepts in degradation under cyclic loading Fatigue in the very high cycle regime, including failure mode transitions from surface to subsurface, effects of surface treatment, processing, and loading conditions Modeling (including degradation processes and related driving forces, multiscale/multi-resolution methods, computational hierarchical and concurrent methods for coupled component and material responses, novel methods for notch root analysis, fracture mechanics, damage mechanics, crack growth kinetics, life prediction and durability, and prediction of stochastic fatigue behavior reflecting microstructure and service conditions) Models for early stages of fatigue crack formation and growth that explicitly consider microstructure and relevant materials science aspects Understanding the influence or manufacturing and processing route on fatigue degradation, and embedding this understanding in more predictive schemes for mitigation and design against fatigue Prognosis and damage state awareness (including sensors, monitoring, methodology, interactive control, accelerated methods, data interpretation) Applications of technologies associated with fatigue and their implications for structural integrity and reliability. This includes issues related to design, operation and maintenance, i.e., life cycle engineering Smart materials and structures that can sense and mitigate fatigue degradation Fatigue of devices and structures at small scales, including effects of process route and surfaces/interfaces.