International Journal of Fatigue最新文献

{"title":"An adaptive phase field model for high cycle fatigue analysis across specimen geometries","authors":"Guangxu Chen ,&nbsp;Can Erdogan ,&nbsp;Tuncay Yalçinkaya ,&nbsp;Xianqiao Wang ,&nbsp;Keke Tang","doi":"10.1016/j.ijfatigue.2025.109163","DOIUrl":"10.1016/j.ijfatigue.2025.109163","url":null,"abstract":"<div><div>High cycle fatigue behavior of components with notches and cracks, which are common in engineering applications, is significantly influenced by geometrical size effect and complicates accurate fatigue life prediction. Traditional methods for addressing this issue often limited to specific types of components and rely heavily on empirical correlations. To overcome these limitations, an adaptive phase-field model was proposed in this work, which integrates a stress triaxiality-dependent fatigue degradation function, a cycle-time transfer scheme, and a thermal analogy solution strategy. This model allows consistent quantification of geometrical size effect across various specimen geometries and notch configurations. The model’s effectiveness was validated using a wide range of experimental datasets, demonstrating its ability to accurately capture the fatigue behavior of both notched and cracked specimens. Notably, the model achieves good computational efficiency, completing one million cycles within 16 h, and requires minimal calibration with only a few experimental data pairs. Additionally, the fatigue damage in the model is designed to depend solely on stress triaxiality and strain energy at a material point, making its application independent of the presence of notches or cracks. These features suggest that the proposed model can serve as a promising numerical tool for fatigue life management and structural design of components.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"201 ","pages":"Article 109163"},"PeriodicalIF":5.7,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144597400","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}

{"title":"A novel multistage time sweep testing approach for fatigue evaluation of asphalt binders","authors":"Faqi Gong ,&nbsp;Yonglin Hu ,&nbsp;Hui Li ,&nbsp;Yuqing Zhang","doi":"10.1016/j.ijfatigue.2025.109162","DOIUrl":"10.1016/j.ijfatigue.2025.109162","url":null,"abstract":"<div><div>Accurate evaluation of asphalt binder’s fatigue performance is crucial for material selection in asphalt pavements. Current fatigue evaluation methods include the Time Sweep (TS) testing approach, known for its high accuracy but time-consuming, and the Linear Amplitude Sweep (LAS) testing approach, which is efficient but sometimes yields results that deviate from those of the TS testing approach. To balance accuracy and efficiency, this study develops a novel Multistage Time Sweep (MSTS) testing approach for fatigue evaluation of asphalt binders. The methodology integrates LAS testing for strain threshold (<em>ε_f</em>) determination and multi-stage strain-controlled testing for systematic fatigue performance assessment. The multi-stage strain testing protocol consists of two distinct phases: a 900-cycle viscoelastic characterization phase with progressively increasing strain amplitudes (0.1%, 0.2%, 0.3%), followed by a 24,000-cycle fatigue evaluation phase with four incremental strain levels (20%, 40%, 60%, 80% of <em>ε_f</em>). This study systematically compares the rheological behavior and fatigue-induced crack morphology of various asphalt binders in LAS, TS, and MSTS tests across multiple temperature-frequency combinations. Subsequently, the fatigue performance of asphalt binders in MSTS tests was quantitatively assessed through crack length and Paris’ law analysis. Results indicate that crack patterns of asphalt binders from LAS tests produce highly variable due to the combined effects of plastic deformation, fatigue damage and edge flow. In contrast, asphalt binders yield consistent crack patterns with a central undamaged zone surrounded by uniformly distributed radial cracks from both TS and MSTS tests. A defined radial crack length can quantitatively characterize fatigue performance of asphalt binders, and Paris’ law can be used to model the crack growth stage of asphalt binders. Paris’ law coefficients can directly correlate with the fatigue performance of asphalt binders and remains unaffected by test frequency or amplitude. The proposed MSTS testing approach addresses key limitations of LAS (coupled strength-fatigue damage) and TS (fixed strain/prolonged duration), providing reliable support for asphalt binder fatigue evaluation and materials selection in pavement engineering.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"201 ","pages":"Article 109162"},"PeriodicalIF":5.7,"publicationDate":"2025-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144597399","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}

{"title":"Influence of vanadium carbides and stacking fault energy on the low-cycle fatigue behavior of a face-centered cubic multi-principal element alloy","authors":"Felix Oppermann ,&nbsp;Christian Hinte ,&nbsp;Steffen Wackenrohr ,&nbsp;Ulrich Krupp ,&nbsp;Hans Jürgen Maier ,&nbsp;Christian Haase","doi":"10.1016/j.ijfatigue.2025.109158","DOIUrl":"10.1016/j.ijfatigue.2025.109158","url":null,"abstract":"<div><div>Multi-principal element alloys (MPEA) have gathered significant attention in the scientific community due to their versatility and design concepts. The Fe30Mn10Co10Cr (at.-%) MPEA system revealed outstanding mechanical properties, owing to the activation of multiple strengthening mechanisms. In this MPEA system, the formation of vanadium carbides was found to be efficient to enhance the strength and to provide further design flexibility. However, the low-cycle fatigue behavior has not yet been investigated.</div><div>To address this, a fully recrystallized, single-phase face-centered cubic (fcc) structure and a recrystallized and aged state that was strengthened by a uniform distribution of 6.5 % nanosized vanadium carbides were evaluated. It was revealed that the aged samples exhibited a notable improvement in cyclic fatigue performance. The precipitation of vanadium carbides led to a reduction in solute carbon content in the fcc matrix, which in turn resulted in the transformation-induced plasticity effect becoming the dominant deformation mechanism in the aged samples. This was coupled with a decrease in plastic strain amplitude and an increase in slip reversibility. As a result, the number of cycles to failure in the low-cycle fatigue regime increased by 40.8 % to 62.1 %, facilitating the concurrent optimization of both tensile and fatigue properties.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"201 ","pages":"Article 109158"},"PeriodicalIF":5.7,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144604404","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}

{"title":"Effect of Laser Shock Peening on fatigue properties of additively manufactured AlSi10Mg","authors":"Martin Matušů ,&nbsp;Ondřej Stránský ,&nbsp;Michal Slaný ,&nbsp;Jan Šimota ,&nbsp;Ludmila Džuberová ,&nbsp;Jakub Rosenthal ,&nbsp;Jan Papuga","doi":"10.1016/j.ijfatigue.2025.109149","DOIUrl":"10.1016/j.ijfatigue.2025.109149","url":null,"abstract":"<div><div>This study investigates the fatigue strength characteristics of AlSi10Mg specimens produced by Laser Powder Bed Fusion (L-PBF) and heat-treated at 200 °C for 2 h. A particular focus of this paper is on evaluating the potential of Laser Shock Peening (LSP) to enhance their fatigue performance. The hourglass specimens were printed in a single batch, resulting in six distinct groups for testing. While three series remained in the as-built state, the other three underwent machining to achieve specific dimensions and surface roughness. Additionally, two variants of the Laser Shock Peening process were applied to two groups of as-built specimens and to two groups of machined specimens. Fatigue testing was performed using a resonant pulsator at the load ratio of <em>R</em> = 0.1. The surface roughness and depth profiles of residual stress were analyzed. A specific focus was set to identify the pore closure due to applied LSP showing that the chosen LSP configurations significantly modify the porosity of additively manufactured AlSi10Mg samples. The results show that the more energy-intensive LSP process improves the fatigue behavior to a point where the difference in fatigue life between machined and as-built specimens becomes minor.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"201 ","pages":"Article 109149"},"PeriodicalIF":5.7,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144579844","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}

{"title":"Prevailing effect of residual stresses and defects on the fatigue strength of net-shape parts produced with Laser Powder Bed Fusion (L-PBF) 316L stainless steel","authors":"Marion Auffray ,&nbsp;Franck Morel ,&nbsp;Linamaria Gallegos Mayorga ,&nbsp;Etienne Pessard ,&nbsp;Thierry Baffie ,&nbsp;Pierre Merot ,&nbsp;Paul Buttin","doi":"10.1016/j.ijfatigue.2025.109107","DOIUrl":"10.1016/j.ijfatigue.2025.109107","url":null,"abstract":"<div><div>Laser Powder Bed Fusion (L-PBF) additive manufacturing enables the production of complex-shaped parts with high mechanical resistance. Such components exhibit a multi-scale microstructure, internal, sub-surface, and surface defects, a rough surface finish and a residual stress gradient in the as-built net-shape condition. All of these factors can alter the fatigue behaviour. This study aims to improve the understanding of the combined effect of various surface parameters on the fatigue behaviour of L-PBF 316L stainless steel by conducting an extensive experimental campaign. Uni-axial fatigue tests were carried out on six batches having an as-built or heat-treated microstructure and a net-shape, pre-corroded net-shape, single-defect net-shape or polished surface condition. Results were compared with data from the literature: as-built polished, pre-corroded polished, or single-defect polished specimens. Studied defects were process-induced (e.g. lack of fusion, spatter, gas pore) and artificial (i.e. corrosion pit, electric discharge machined defect). Their sizes ranged from 10 to <span><math><mrow><mn>700</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span>. The residual stresses gradients were characterized by X-ray diffraction. A Kitagawa–Takahashi diagram was used to illustrate the effects of the various parameters on the fatigue behaviour. Residual stresses and defects were the most influential factors on the fatigue strength of net-shape specimens over surface condition and sub-surface microstructure.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"201 ","pages":"Article 109107"},"PeriodicalIF":5.7,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144580427","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}

{"title":"Fatigue lifetime assessment of tube-to-flange arc-welded steel joints with reinforcement ribs under constant and variable amplitude multiaxial fatigue loadings according to the Peak Stress Method","authors":"Alberto Visentin ,&nbsp;Alberto Campagnolo ,&nbsp;Vittorio Babini ,&nbsp;Giovanni Meneghetti","doi":"10.1016/j.ijfatigue.2025.109146","DOIUrl":"10.1016/j.ijfatigue.2025.109146","url":null,"abstract":"<div><div>Welded reinforcements are a widespread solution when increasing the stiffness and load bearing capacity of engineering structures is of primary interest, particularly under in-service cyclic loadings which require a fatigue durability assessment. However, experimental fatigue data available in the literature and the number of classified details reported in Standards and Recommendations are limited. On top of that, the fatigue strength assessment of large-scale reinforced welded structures generally involves complex geometries and variable amplitude multiaxial loadings. In this framework, local approaches for the fatigue assessment of reinforced welded structures are applicable without limitations in the complexity of geometries or loading conditions. In this investigation, the fatigue strength of complex Square Hollow Section (SHS) tube-to-flange arc-welded joints with reinforcement ribs of S355 structural steel has been experimentally investigated under constant and variable amplitude pure bending, pure torsion and in-phase as well as out-of-phase combined bending and torsion loadings. The number of cycles to break-through has been adopted as a failure criterion and the cracking behaviour of the tested specimens has been also investigated. Afterwards, the Peak Stress Method (PSM) has been successfully adopted to assess the fatigue strength of the welded reinforcement ribs joining the tube and flange.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"201 ","pages":"Article 109146"},"PeriodicalIF":5.7,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144613232","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}

{"title":"A unified probabilistic fatigue life prediction method for corroded welded joints of uncoated weathering steel considering the effect of multiple cracks","authors":"Yan Ma ,&nbsp;Qing hua Zhang ,&nbsp;Chuang Cui ,&nbsp;Yong Xia ,&nbsp;Kun Tang","doi":"10.1016/j.ijfatigue.2025.109159","DOIUrl":"10.1016/j.ijfatigue.2025.109159","url":null,"abstract":"<div><div>Understanding the fatigue behavior of corroded welded joints is crucial for ensuring the long-term structural integrity of uncoated weathering steel infrastructure in harsh environments. Traditional deterministic fatigue life prediction methods fail to capture the multiple uncertainties of corroded welded joints arising from the stochastic nature of corrosion morphology, including pit characteristics, crack initiation variability, and weld toe geometry evolution. Existing probabilistic approaches consider these uncertainties individually. This study proposes a unified probabilistic framework for fatigue life prediction under multi-source uncertainty by integrating experimental data, a crack growth model, and a Monte Carlo procedure. The crack driving force response under corrosion-induced weld toe geometric perturbations is quantitatively modelled via 3D surface reconstructions of actual corrosion morphology. An analytical approach is proposed to quantify the stress intensity factor considering corrosion-induced surface degradation. A corrosion fatigue crack growth model is developed. This model accurately determines the stress intensity factor by incorporating the effects of corrosion, crack closure, and multi-crack interactions, which is validated through fatigue tests on two types of corroded weathering steel welded joints. Finally, Monte Carlo sampling considering the multiple sources of uncertainty is applied for damage tolerance assessment and estimation of the conditional reliability fatigue life of corroded welded joints. The results show that corrosion significantly reduces the fatigue strength of the welded joints, alters crack propagation modes, and increases crack density. The predicted fatigue life approximately follows a lognormal distribution. This approach provides a more reliable foundation for assessing the structural safety margin, thus facilitating the design and maintenance of weathering steel structures in corrosive environments.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"201 ","pages":"Article 109159"},"PeriodicalIF":5.7,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144589234","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}

{"title":"Defect sensitivity of high-strength steel 42CrMo4: The role of crack initiation and non-propagation defining the fatigue limit","authors":"Suraj S. More ,&nbsp;Joona Vaara ,&nbsp;Kimmo Kärkkäinen ,&nbsp;Miikka Väntänen ,&nbsp;Tero Frondelius ,&nbsp;Herwig Mayer ,&nbsp;Bernd M. Schönbauer","doi":"10.1016/j.ijfatigue.2025.109147","DOIUrl":"10.1016/j.ijfatigue.2025.109147","url":null,"abstract":"<div><div>In the defect-based fatigue framework, there are still open questions regarding the role of crack initiation. The fatigue limit of small defects is commonly explained through crack non-propagation, although direct evidence is not always given to support this. In the present study, the defect sensitivity of quenched and tempered 42CrMo4 steel was systematically investigated using specimens containing artificially introduced defects of various sizes and shapes. The fatigue limit is defined by crack non-propagation for defects with a notch-root radius below a critical value of <em>ρ</em>_c ≈ 80 µm. On the other hand, crack initiation determines the fatigue limit of blunter, notch-like defects. It is shown that classical notch-fatigue concepts can be applied to predict crack initiation at small defects. For the sake of transferability of experimental results and the development of physics-based fatigue models, distinguishing between the two fatigue limit mechanisms is critical for the safe operation of machine components.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"201 ","pages":"Article 109147"},"PeriodicalIF":5.7,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144589210","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}

{"title":"Evaluating methods to reduce duration of near-threshold fatigue crack growth rate measurements for low-alloy steels in hydrogen gas","authors":"Kevin A. Nibur ,&nbsp;Brian P. Somerday","doi":"10.1016/j.ijfatigue.2025.109150","DOIUrl":"10.1016/j.ijfatigue.2025.109150","url":null,"abstract":"<div><div>Measurement of the near-threshold fatigue crack growth rate (da/dN) vs. stress-intensity factor range (ΔK) relationship in hydrogen gas is essential for maximizing the calculated design fatigue life of high-pressure hydrogen storage vessels. However, such measurements are rarely performed, since the low cyclic loading frequencies applied in standard practice lead to prohibitively protracted test durations. The objective of this study was to demonstrate two means for reducing test durations when measuring near-threshold da/dN vs. ΔK relationships under decreasing ΔK for low-alloy pressure vessel steels in hydrogen gas: 1) imposing steeper K-gradients relative to the recommended limits in standards such as ASTM E647, and 2) increasing cyclic loading frequency relative to typical values applied during fatigue crack growth testing of low-alloy steels in hydrogen gas. Recognizing that steeper K-gradients could amplify loading-history effects, test methods employing this approach were designed to mitigate such effects by either maintaining constant K_max or gradually increasing the K-gradient as the threshold was approached. Although the varying K-gradient method was vulnerable to loading-history effects in the form of plasticity-induced crack closure, particularly at lower stress ratio (R) and higher starting K_max values, these effects could be compensated by applying the adjusted compliance ratio (ACR) method. It was demonstrated that steeper K-gradients in concert with increased cyclic loading frequency reduced the duration of near-threshold fatigue crack growth tests in hydrogen gas by more than 99% relative to standard practices.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"201 ","pages":"Article 109150"},"PeriodicalIF":5.7,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144579843","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}

{"title":"Effect of mean stress on high cycle fatigue strength of a directionally solidified nickel-based superalloy CM247LC at 650 ℃","authors":"Arpit Gupta ,&nbsp;Sarita Bharti ,&nbsp;Vakil Singh ,&nbsp;SR Singh ,&nbsp;Neeta Paulose ,&nbsp;Girija Shankar Mahobia","doi":"10.1016/j.ijfatigue.2025.109137","DOIUrl":"10.1016/j.ijfatigue.2025.109137","url":null,"abstract":"<div><div>In this investigation, high cycle fatigue (HCF) behaviour of the directionally solidified nickel based superalloy CM247LC has been characterised, at the test temperature of 650 ℃, in air, under uniaxial stress-control mode, at different stress ratios (R) of −1, 0.4, 0.5 and 0.7. The fatigue strength at 10⁷ cycles and the level of the S-N curves are observed to decrease with a rise in R value from −1 to 0.7. Microstructure of this alloy in the heat-treated condition consists of cuboidal γʹ particles embedded in γ matrix, γ/γʹ eutectic and MC carbides of varying sizes and distribution. The deformation behaviour of the alloy under cyclic loading is characterized by transmission electron microscopy (TEM). Cyclic deformation at low R values remains confined in the γ phase, and dislocation density in γ channels increases progressively with the rise in the stress ratio. However, at the highest stress ratio of 0.7, deformation extends into the γʹ particles. Fatigue crack initiation occurs mostly from the interior, and fracture, in general, is faceted in nature. There is a large variation in fatigue life of the specimens tested under identical test conditions due to microstructural inhomogeneities like segregates of fine carbides in interdendritic regions, oxides and shrinkage pores.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"201 ","pages":"Article 109137"},"PeriodicalIF":5.7,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144572134","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}