International Journal of Fatigue最新文献_第5页

Experimental study on fatigue properties and fracture characteristics of sandstone under different cycle times and frequencies conditions 不同循环次数和频率条件下砂岩疲劳性能及断裂特性试验研究

IF 6.8 2区材料科学

International Journal of Fatigue Pub Date : 2025-09-17 DOI: 10.1016/j.ijfatigue.2025.109293

Sheng-Qi Yang , Ke-Sheng Li , Peng-Fei Yin

{"title":"Experimental study on fatigue properties and fracture characteristics of sandstone under different cycle times and frequencies conditions","authors":"Sheng-Qi Yang , Ke-Sheng Li , Peng-Fei Yin","doi":"10.1016/j.ijfatigue.2025.109293","DOIUrl":"10.1016/j.ijfatigue.2025.109293","url":null,"abstract":"<div><div>Many underground engineering activities (e.g., drilling, tunnel excavation, vehicle loading, hydraulic fracturing, compressed air energy storage) generate dynamic disturbances, producing seismic waves or periodic cyclic loads, causing instability and failure of underground rock masses under the influence of fatigue loading. This paper focuses on the mechanical behavior of sandstone specimens under fatigue loading. Triaxial fatigue mechanical tests under multi-stage incremental cyclic loading were conducted under different cycle numbers, loading frequencies, and frequency sequences. The influence of the aforementioned factors on the strength and deformation characteristics, energy evolution, and macroscopic failure modes of sandstone specimens were systematically analyzed, revealing the fatigue <em>meso</em>-microscopic failure characteristics of sandstone under multi-stage incremental cyclic loading. The research results show that: as the number of cycles in the fatigue loading stage increases, the strength of sandstone specimens exhibits a three-stage change of “decrease-stabilize-decrease”, with both crack size and number increasing, and intergranular cracks being dominant at the specimen failure fracture surface. As the loading frequency increases, the fatigue life and internal strain energy of sandstone increase, the volume and complexity of internal cracks increase, and the proportion of transgranular cracks at the fracture surface increases. The loading frequency sequence has no significant effect on specimen strength and energy evolution. Under sequential frequency conditions, sandstone exhibits higher crack volume and a more complex crack system, with an increase in the scale of intergranular cracks at the fracture surface.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"203 ","pages":"Article 109293"},"PeriodicalIF":6.8,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145093891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermal plasto-elastohydrodynamic lubrication-wear-contact fatigue coupled modeling in mixed lubrication rolling-sliding contact 混合润滑滚动滑动接触的热塑性-弹流润滑-磨损-接触疲劳耦合建模

IF 6.8 2区材料科学

International Journal of Fatigue Pub Date : 2025-09-17 DOI: 10.1016/j.ijfatigue.2025.109298

Xin Li , Jiling Chen , Jinyuan Tang , Liangliang Lv , Shengyu You , Wen Shao

{"title":"Thermal plasto-elastohydrodynamic lubrication-wear-contact fatigue coupled modeling in mixed lubrication rolling-sliding contact","authors":"Xin Li , Jiling Chen , Jinyuan Tang , Liangliang Lv , Shengyu You , Wen Shao","doi":"10.1016/j.ijfatigue.2025.109298","DOIUrl":"10.1016/j.ijfatigue.2025.109298","url":null,"abstract":"<div><div>Concentrated contact pressure and thinner oil film thickness inevitably lead to plastic deformation and surface wear. The current work has developed a new thermal plasto-elastohydrodynamic mixed lubrication-wear-contact fatigue coupled model. By comprehensively considering the complex coupling effects among contact pressure, plastic deformation, temperature field, fluid lubrication and surface topography wear evolution, the influence of plastic deformation and thermal deformation on lubrication performance is analyzed. Considering the interaction between surface topography evolution and lubrication performance, the impact of surface mild wear on contact performance is examined. By considering the coupling interactions among microtopography-lubrication state, residual stress, hardness gradient, the mild wear and contact fatigue behavior under multi-physics coupling conditions is analyzed. Rolling-sliding contact fatigue experiments on a twin disc test rig were conducted to investigate the influence of various engineering surfaces and operating parameters on wear and fatigue performance. The results show that the proposed model can deal with thermal mixed lubrication problems with real machined rough surface conditions. The surface profiles after wear and rolling contact fatigue lives exhibit considerable consistency with experimental observations. This work provides strong practical guidance for optimizing material surface processing techniques, enhancing lubrication performance, and preventing fatigue failure of components such as gears and bearings.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"203 ","pages":"Article 109298"},"PeriodicalIF":6.8,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145093888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multiaxial isothermal and thermomechanical fatigue behavior of 316H stainless steel welded joint and life prediction 316H不锈钢焊接接头多轴等温、热疲劳行为及寿命预测

IF 6.8 2区材料科学

International Journal of Fatigue Pub Date : 2025-09-17 DOI: 10.1016/j.ijfatigue.2025.109295

Yan Li , Fang Wang , Yiming Zheng , Kang Wang , Xu Chen , Bingbing Li

{"title":"Multiaxial isothermal and thermomechanical fatigue behavior of 316H stainless steel welded joint and life prediction","authors":"Yan Li , Fang Wang , Yiming Zheng , Kang Wang , Xu Chen , Bingbing Li","doi":"10.1016/j.ijfatigue.2025.109295","DOIUrl":"10.1016/j.ijfatigue.2025.109295","url":null,"abstract":"<div><div>A comparative study is conducted to examine the effect of strain amplitude on the deformation behavior of welded joints (WJ) made of 316H austenitic stainless steel under multiaxial loading, specifically in the context of isothermal fatigue (IF) conditions and thermomechanical fatigue (TMF). The temperature remains at 650 °C in the IF tests while in the TMF tests the temperature varies from 300 °C to 650 °C. Results show that at the small strain amplitude (0.2 %, 0.3 %, 0.4 %), the fatigue life under IF conditions are considerably shorter compared to the life under TMF conditions, which is closely related with the larger amount of ferrite transformation in IF tests. With the strain amplitude rises (0.5 %, 0.6 %), the local plastic deformation in the welded metal (WM) significantly intensifies during TMF tests. Consequently, the disparity in fatigue life progressively decreases at the same time. Cracks in all experiments consistently initiate at the WM region owing to the high dislocation density and ferrite/austenite interfacial damage between phases in WM. The behavior of crack propagation is remarkably affected by the ferrite/austenite grain boundaries. A multiaxial fatigue life prediction model, suitable for both WJ and base metal (BM), is proposed, incorporating a correction factor that accounts for temperature and normal stress effects. All results are shown to fall within a ± 2 scatter band, demonstrating its accuracy and reliability under multiaxial loading conditions.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"203 ","pages":"Article 109295"},"PeriodicalIF":6.8,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145093890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cycle-dependent multiaxial stress relaxations under non-proportional creep-fatigue conditions 非比例蠕变疲劳条件下周期相关的多轴应力松弛

IF 6.8 2区材料科学

International Journal of Fatigue Pub Date : 2025-09-15 DOI: 10.1016/j.ijfatigue.2025.109286

Le Xu , Ji Wang , Yu-Chen Wang , Run-Zi Wang , Takamoto Itoh , Xian-Cheng Zhang

{"title":"Cycle-dependent multiaxial stress relaxations under non-proportional creep-fatigue conditions","authors":"Le Xu , Ji Wang , Yu-Chen Wang , Run-Zi Wang , Takamoto Itoh , Xian-Cheng Zhang","doi":"10.1016/j.ijfatigue.2025.109286","DOIUrl":"10.1016/j.ijfatigue.2025.109286","url":null,"abstract":"<div><div>A series of non-proportional creep-fatigue tests under different strain paths were performed for type 304 stainless steel at 873 K. Among these strain paths, the holding period was applied at peak axial strain or peak shear strain to introduce creep damage under different multiaxial stress states. A unified visco-plastic model was developed for describing the cyclic deformation behaviors. More specifically, the Tanaka’s non-proportional parameter was introduced to consider the additional hardening effect, and stress triaxiality was used to modified the static recovery term for multiaxial stress relaxation behaviors. Furthermore, the cycle-dependent relaxed stress was described by a simple evolution equation, which constructed the relationship between hardening coefficient in static recovery term and equivalent plastic strain rate. The cycle-dependent hardening and stress relaxation behaviors were correlated with the equivalent plastic strain rate through three evolution equations with a consistent form, avoiding the introduction of additional material parameters when considering new deformation behaviors, which was more conducive to engineering applications. After obtaining precise stress/strain response, an energy-based creep-fatigue damage evaluation method was used to predict the non-proportional creep-fatigue life, which showed good agreement with the experimental data within a factor of 1.5.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"203 ","pages":"Article 109286"},"PeriodicalIF":6.8,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145093892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of pre-training on low-cycle fatigue of NiTi pseudoelastic shape memory alloy wires 预训练对NiTi假弹性形状记忆合金丝低周疲劳的影响

IF 6.8 2区材料科学

International Journal of Fatigue Pub Date : 2025-09-15 DOI: 10.1016/j.ijfatigue.2025.109273

Zihong Liu , Yahui Zhang , Jun Wang , Xiaojun Gu , Jihong Zhu , Weihong Zhang

{"title":"Effect of pre-training on low-cycle fatigue of NiTi pseudoelastic shape memory alloy wires","authors":"Zihong Liu , Yahui Zhang , Jun Wang , Xiaojun Gu , Jihong Zhu , Weihong Zhang","doi":"10.1016/j.ijfatigue.2025.109273","DOIUrl":"10.1016/j.ijfatigue.2025.109273","url":null,"abstract":"<div><div>This paper investigates the impact of mechanical pre-training on the structural fatigue of NiTi pseudoelastic shape memory alloy (SMA) wires. Pseudoelastic NiTi wires were subjected to various training processes, incorporating different stress amplitudes, frequencies, and numbers of cycles. Subsequently, stress- and strain-controlled fatigue tests were conducted. A theoretical model was then proposed to elucidate the mechanism of the training effect, based on the energy stored in transformation-induced plasticity (TRIP). The local plasticity density was evaluated using an electrical resistivity-based approach. The results reveal several key findings: (i) the stored energy of TRIP from over-stressed training improves fatigue resistance by mitigating concentrated local stress; (ii) macroscopic plastic strain exhibits independence from local plasticity, suggesting its limited relevance to the training effect; (iii) the local plasticity density, measured by electrical resistivity, serves as an indicator of low-cycle fatigue life in trained NiTi SMAs. Based on these insights, a fatigue prediction model for trained NiTi SMAs was established and experimentally validated. Through an appropriate training process, the structural fatigue lifetime of NiTi SMAs can be extended up to tenfold.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"203 ","pages":"Article 109273"},"PeriodicalIF":6.8,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145093893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced low-cycle fatigue model for additively manufactured titanium alloys containing internal volumetric defects 增材制造含内体积缺陷钛合金的增强低周疲劳模型

IF 6.8 2区材料科学

International Journal of Fatigue Pub Date : 2025-09-15 DOI: 10.1016/j.ijfatigue.2025.109288

Yun Hu , Zhihui Chen , Jiangjing Xi , Hui Zhang , Chongxin Gan , Kamran Nikbin , Gang Xiao

{"title":"Enhanced low-cycle fatigue model for additively manufactured titanium alloys containing internal volumetric defects","authors":"Yun Hu , Zhihui Chen , Jiangjing Xi , Hui Zhang , Chongxin Gan , Kamran Nikbin , Gang Xiao","doi":"10.1016/j.ijfatigue.2025.109288","DOIUrl":"10.1016/j.ijfatigue.2025.109288","url":null,"abstract":"<div><div>This study examines the influence of void growth and volumetric defects on the variability of fatigue life in the low-cycle fatigue failure behavior of additively manufactured (AM) Ti-6Al-4 V alloy. To address this, a novel predictive model for low-cycle fatigue failure (PFW-CVGM) is introduced, integrating the geometric characteristic parameters of volumetric defects with the Cyclic Void Growth Theory (CVGM). A comprehensive calibration of PFW-CVGM parameters—including the Void Growth Model (VGM), Cyclic Void Growth Model (CVGM), and Fracture-Mode Weighted CVGM (FW-CVGM)—is conducted through uniaxial tensile and low-cycle fatigue experiments on both smooth and notched specimens of AM Ti-6Al-4 V alloy. The proposed model’s accuracy is subsequently validated via experiments and simulations. All fatigue life predictions of the proposed PFW-CVGM fall within a 1.5x error band, significantly improving the accuracy compared to the conventional models (CVGM and FW-CVGM model). This research offers theoretical improvements for assessing the fatigue life of additively manufactured components containing volumetric defects.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"203 ","pages":"Article 109288"},"PeriodicalIF":6.8,"publicationDate":"2025-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145118911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fatigue crack growth mechanisms in similar and dissimilar aluminum friction stir welds: Residual stress, microstructure, and microhardness effects 相似和不同铝搅拌摩擦焊缝的疲劳裂纹扩展机制：残余应力、显微组织和显微硬度效应

IF 6.8 2区材料科学

International Journal of Fatigue Pub Date : 2025-09-14 DOI: 10.1016/j.ijfatigue.2025.109287

Xiangbin Wang , Anthony G. Spangenberger , Adrian DeWald , Diana A. Lados

{"title":"Fatigue crack growth mechanisms in similar and dissimilar aluminum friction stir welds: Residual stress, microstructure, and microhardness effects","authors":"Xiangbin Wang , Anthony G. Spangenberger , Adrian DeWald , Diana A. Lados","doi":"10.1016/j.ijfatigue.2025.109287","DOIUrl":"10.1016/j.ijfatigue.2025.109287","url":null,"abstract":"<div><div>Spatially varying microstructure, microhardness, and residual stress in friction stir welds cause crack growth rates to fluctuate near weld nuggets and complicate fatigue life predictions. Similar and dissimilar friction stir butt welds of 6061-T651 and 7075-T735 aluminum alloys were characterized by optical microscopy and microhardness traversals, and residual stress mapping by the contour method and fatigue crack growth testing were conducted across and within weld nuggets. Crack growth data were analyzed by the crack-compliance method to calculate residual stresses and consequent stress intensity factors (K<sub>res</sub>), and contrasted with the contour method. Constant ΔK crack growth testing across the welds revealed suppression of growth rates relative to the base materials, being lowest in the thermo-mechanically affected zones. Crack growth within the weld nuggets was conducted at decreasing ΔK and resulted in uneven through-thickness crack growth. A method for crack propagation analysis of materials containing heterogeneous residual stresses is proposed using contour method data to calculate K<sub>res</sub> profiles, indicating that crack growth rates increased in regions of greater K<sub>res</sub> and microhardness in both crack-weld orientations. The results from these studies can be used to design weld configurations with beneficial residual stresses and enhanced fatigue crack growth resistance for structural applications.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"203 ","pages":"Article 109287"},"PeriodicalIF":6.8,"publicationDate":"2025-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145118912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A new damage model for real-time lifetime prediction of composite laminates based on acoustic emission monitoring 基于声发射监测的复合材料层合板损伤实时寿命预测新模型

IF 6.8 2区材料科学

International Journal of Fatigue Pub Date : 2025-09-13 DOI: 10.1016/j.ijfatigue.2025.109284

Fan Dong , Yazhi Li , Biao Li

{"title":"A new damage model for real-time lifetime prediction of composite laminates based on acoustic emission monitoring","authors":"Fan Dong , Yazhi Li , Biao Li","doi":"10.1016/j.ijfatigue.2025.109284","DOIUrl":"10.1016/j.ijfatigue.2025.109284","url":null,"abstract":"<div><div>Real-time damage estimation and remaining life prediction of composite structures are critical challenges in engineering. This study presents an innovative method based on acoustic emission (AE) signals for real-time monitoring of fatigue damage and life prediction in composite laminates. Cumulative AE energy is used as a damage metric, and a double-logistic (DL) model is introduced to describe nonlinear damage growth and serve as a physical constraint to ensure the consistency of damage evolution with underlying physical mechanisms. The DL parameters are determined by using AE signals, and the method of which is as follows: (1) Generative adversarial networks are used to expand the parameter space of the DL model; (2) A long short-term memory-Transformer (LT) model establishes a mapping between AE signals and DL parameters; (3) Extended Kalman Filter is used to dynamically update the parameters. The validation fatigue experiments were made for glass fiber and carbon fiber reinforced polymer matrix laminates with AE monitoring, which shows that the established DL damage model can effectively predict the fatigue life of composite laminates with satisfactory accuracy.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"203 ","pages":"Article 109284"},"PeriodicalIF":6.8,"publicationDate":"2025-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145093894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anisotropic fatigue behavior of bainitic/martensitic rail steels: The effect of stringer-shaped inclusion orientation 贝氏体/马氏体钢轨钢的各向异性疲劳行为：弦状夹杂物取向的影响

IF 6.8 2区材料科学

International Journal of Fatigue Pub Date : 2025-09-12 DOI: 10.1016/j.ijfatigue.2025.109283

Yusong Fan , Guhui Gao , Miao Liu , Xiang Xu , Zhanzhong Wang , Guanghui Liu , Xiaolu Gui

{"title":"Anisotropic fatigue behavior of bainitic/martensitic rail steels: The effect of stringer-shaped inclusion orientation","authors":"Yusong Fan , Guhui Gao , Miao Liu , Xiang Xu , Zhanzhong Wang , Guanghui Liu , Xiaolu Gui","doi":"10.1016/j.ijfatigue.2025.109283","DOIUrl":"10.1016/j.ijfatigue.2025.109283","url":null,"abstract":"<div><div>In this study, the effect of stringer-shaped inclusion orientation on anisotropic fatigue behavior in bainitic/martensitic rail steel was discussed. Results showed that an 18 % enhancement in fatigue strength is achieved for the longitudinal samples (inclusion stringers parallel to loading direction, σ<sub>w8</sub> = 626 MPa) compared to the transverse counterparts (inclusion stringers perpendicular to loading direction, σ<sub>w8</sub> = 532 MPa). The significant fatigue anisotropy was attributed to the differences in size of stringer-shaped inclusions quantified through Murakami’s √area parameter. Critical analysis on the distribution of granular bright facet (GBF) area indicates that the central part of the stringer-shaped inclusions can be defined as effective inclusion for transverse samples while the inclusion aspect ratio is larger than 5. Based on √area model, inclusions sensitivity parameter α was introduced to evaluate the tolerance of matrix to inclusions. Fatigue life prediction model employing effective inclusion sizes rather than the entire stringer-shaped inclusions dimensions improved prediction accuracy. This study further validated the <em>F</em>-parameter model’s predictive consistency across orientations.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"203 ","pages":"Article 109283"},"PeriodicalIF":6.8,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145093911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Buffeting-induced fatigue in suspension bridges: time-domain analysis with AI techniques 悬索桥抖振疲劳：基于AI技术的时域分析

IF 6.8 2区材料科学

International Journal of Fatigue Pub Date : 2025-09-12 DOI: 10.1016/j.ijfatigue.2025.109280

Hanieh Soltani, Gholamreza Nouri, Seyed Hossein Hosseini Lavassani

{"title":"Buffeting-induced fatigue in suspension bridges: time-domain analysis with AI techniques","authors":"Hanieh Soltani, Gholamreza Nouri, Seyed Hossein Hosseini Lavassani","doi":"10.1016/j.ijfatigue.2025.109280","DOIUrl":"10.1016/j.ijfatigue.2025.109280","url":null,"abstract":"<div><div>Structural stress responses in bridges, induced by traffic, wind, wave, and temperature, are key for evaluating safety and serviceability. The stochastic nature of environmental cyclic loads makes fatigue assessment over a bridge’s life cycle challenging. Cable-supported bridges, particularly suspenders as critical load-bearing members, are prone to fatigue under frequent, large wind-induced buffeting. Therefore, the influence of mean wind speeds and mechanical properties on suspender fatigue is considered in the wind–bridge system. Long-term in-situ wind data from the structural health monitoring (SHM) system of the Hardanger Bridge are used to estimate lifetime fatigue reliability. Time histories of horizontal and vertical buffeting wind components are simulated and applied at multiple deck locations to represent fluctuating aerodynamic loads. Nonlinear finite element analyses (FEA) in OpenSees provide stress responses at critical suspenders. Fatigue damage indices (D) are calculated via rain-flow counting and Miner’s rule. To reduce computational costs, machine learning (ML) and deep learning (DL) models including support vector regression (SVR), random forest (RF), Gaussian process regression (GPR), long short-term memory (LSTM), and gated recurrent unit (GRU) predict fatigue damage across varied wind scenarios and structural parameters. Fatigue life or replacement intervals are defined by the decrease of reliability indices (β) below a threshold. Results indicate that short suspenders at midspan are more vulnerable. Among the algorithms, LSTM is most effective for predicting cumulative fatigue damage, achieving up to 10–25% higher R<sup>2</sup> on testing datasets compared to other models, demonstrating superior capability for accurate fatigue estimation and robust reliability prediction.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"203 ","pages":"Article 109280"},"PeriodicalIF":6.8,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145093896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0