Fatigue & Fracture of Engineering Materials & Structures最新文献

{"title":"Quantifying Fiber Bridging in Mode I Fatigue Delamination of CFRP/GFRP Hybrid Laminates Using a Superposed Traction–Separation Model","authors":"Francisco Maciel Monticeli","doi":"10.1111/ffe.70339","DOIUrl":"https://doi.org/10.1111/ffe.70339","url":null,"abstract":"<p>Hybrid CFRP/GFRP laminates offer an attractive balance between mechanical performance, damage tolerance, and cost efficiency. However, fiber bridging during mode I delamination increases crack-growth resistance while masking the intrinsic fatigue behavior of the material. This study applies a traction–separation-based superposition approach to quantify and isolate the contribution of fiber bridging in unidirectional hybrid laminates under mode I fatigue delamination. The methodology separates monotonic (during pre-cracking) and cyclic bridging contributions using bridging traction curves and fatigue crack-growth data, enabling reconstruction of the zero-bridging Paris curve. Hybrid laminates exhibited enhanced fracture toughness and fatigue resistance, while maintaining intermediate bridging traction behavior compared to nonhybrid systems. After removing bridging effects, hybrid laminates still showed superior intrinsic fatigue performance, indicating that hybridization contributes through mechanisms beyond extrinsic toughening alone. The proposed methodology provides an experimentally efficient framework for fatigue characterization of advanced composite laminates affected by fiber bridging.</p>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"49 9","pages":"3605-3615"},"PeriodicalIF":3.2,"publicationDate":"2026-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ffe.70339","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148710516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fatigue Life Estimation of Steel Welded Joints Under Multiaxial Constant and Variable Amplitude Loadings Including Partial Weld Penetration and Start/Stops","authors":"Ahmad Razi,&nbsp;Ali Fatemi","doi":"10.1111/ffe.70350","DOIUrl":"https://doi.org/10.1111/ffe.70350","url":null,"abstract":"<div>\u0000 \u0000 <p>In many weldment applications, fatigue failures occur under multiaxial cyclic loadings. The current literature on multiaxial fatigue life prediction of welded joints is largely centered on weld toe failures considering simplified weld geometry and under constant amplitude loading conditions. The focus of this work is on application of crack initiation-based fatigue life estimation approaches to steel welded joints with partial weld penetration and preserved start/stop regions as realistic conditions in practice yet rarely studied. The experimental dataset used for validation includes single- and multi-channel axial and torsional load types with and without mean stress and phase shift effects under constant and variable amplitude conditions. Fatigue life estimation methods used include nominal stress, local strain, and critical plane approaches. To account for the notch stress concentration and gradient effects of the welded joint hotspot, the theory of critical distance was employed. The critical plane approach resulted in the highest accuracy, robustness, and conservatism of life predictions for the loading conditions considered with reasonable estimations of micro-crack plane orientations in the welded joints.</p>\u0000 </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"49 9","pages":"3807-3830"},"PeriodicalIF":3.2,"publicationDate":"2026-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148710416","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 Approach to Improve the Fretting Fatigue Resistance of Coating-Substrate Systems by Laser Surface Texturing","authors":"Qiang Wang,&nbsp;Xuejun Chen","doi":"10.1111/ffe.70351","DOIUrl":"https://doi.org/10.1111/ffe.70351","url":null,"abstract":"<div>\u0000 \u0000 <p>Laser surface texturing (LST) is a promising approach for enhancing the interfacial strength and durability of coating-substrate systems. In this study, laser-textured dimples are introduced into the coating-substrate system to investigate the influence of geometric parameters on interfacial strength and fatigue damage under fretting conditions. Three dimensionless parameters (<i>λ</i>, <i>η</i>, and <i>ξ</i>) representing the texture dimple depth, density and distance from the contact center to the nearest dimple on the surface, respectively, are defined to determine the optimal texture. Simultaneously, the Smith-Watson-Topper (SWT) parameter and the stress sharp change value (SCV) are employed to quantify fatigue damage and interfacial strength, respectively. Through a combination of theoretical analysis and finite element method, an optimal dimple geometric configuration (<i>λ</i> = 0.5 and <i>η</i> = 1) is identified, which mitigates fretting contact damage without inducing severe local stress concentrations within the texture itself. Furthermore, a width-dependent optimal distance range (1.0 ≤ <i>ξ</i> ≤ 1.3) is determined to achieve a “damage equilibrium” state, where the maximum fatigue damage is reduced by 11.2%. Finally, the optimal texture reduces the SCV of von Mises stress by 20.6%, significantly improving the interfacial strength. These findings offer an important theoretical basis for the practical application of LST in anti-fretting fatigue design of coating-substrate systems.</p>\u0000 </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"49 9","pages":"3751-3764"},"PeriodicalIF":3.2,"publicationDate":"2026-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148710417","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 Life Prediction of High-Strength Bolts Under Eccentric Assembly Conditions","authors":"Shicheng Gao,&nbsp;Weicheng Li,&nbsp;Jingsong Xie","doi":"10.1111/ffe.70356","DOIUrl":"https://doi.org/10.1111/ffe.70356","url":null,"abstract":"<div>\u0000 \u0000 <p>Eccentric assembly introduces bending into bolted joints and can markedly shorten fatigue life, but its effect is not captured by conventional axial-load fatigue models. This study develops a load-transfer framework for 10.9-grade M16 high-strength bolts that links external load, shank axial force and bending moment, and thread-root stress. A statically indeterminate beam model and a thread contact stress formulation were combined with a three-dimensional finite element model to identify thread-root stress concentration. Calibration and fatigue tests were performed at eccentric assembly angles of 0°, 1°, and 2° under a 120 kN preload and cyclic tensile loading. The simulated bending moments agreed with strain-gauge measurements, and the theoretical thread-root stresses differed from finite element results by no more than 6%. Fatigue life decreased from 72,023 cycles at 0° to 52,010 cycles at 1° and 30,742 cycles at 2°, confirming the detrimental role of eccentricity.</p>\u0000 </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"49 9","pages":"3874-3887"},"PeriodicalIF":3.2,"publicationDate":"2026-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148710460","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":"Predicting Fatigue Life of Additively Manufactured Metals Using Data-Driven and Defect-Based Models: a Comprehensive Review","authors":"Ayitha Sreenivasulu,&nbsp;D. Mallikarjuna Reddy,&nbsp;Rajasekhara Reddy Mutra","doi":"10.1111/ffe.70334","DOIUrl":"https://doi.org/10.1111/ffe.70334","url":null,"abstract":"<div>\u0000 \u0000 <p>Additive manufacturing (AM) is a new trend in the production of lightweight, complex metallic components. Although AM metals often match or surpass the static mechanical properties of conventionally manufactured metals, their fatigue performance remains a significant challenge. Reduced fatigue resistance under cyclic loading limits their use in safety-critical applications. Despite extensive research, a comprehensive synthesis of fatigue data and mechanisms is still lacking. This review addresses this need by consolidating and critically evaluating the literature on the fatigue behavior of AM metals, with a focus on S–N responses and fatigue crack growth characteristics. The review covers major alloy systems produced by various AM techniques and examines how processing variables such as build orientation, processing parameters, and post-processing treatments affect fatigue performance. Comparative data are presented to highlight trends across alloys and manufacturing methods. The paper also analyses fatigue mechanisms and performance-limiting factors, offering insights for improving fatigue reliability in AM components. Finally, it reviews data-driven and physics-based modelling approaches for fatigue life prediction and discusses future challenges and directions for development in this field.</p>\u0000 </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"49 9","pages":"3575-3604"},"PeriodicalIF":3.2,"publicationDate":"2026-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148710397","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 Crack Growth Behavior of an Ultrahigh-Strength Low-Alloy Steel Fabricated Using Laser Powder Bed Fusion to Contain Layered Quenched/Tempered Martensite Microstructures","authors":"Nemanja Kljestan,&nbsp;Alex M. Butler,&nbsp;Brandon A. McWilliams,&nbsp;Marko Knezevic","doi":"10.1111/ffe.70347","DOIUrl":"https://doi.org/10.1111/ffe.70347","url":null,"abstract":"<div>\u0000 \u0000 <p>This study investigates the influence of a characteristic microstructure in a high-strength low-alloy (HSLA) steel created using laser powder bed fusion (LPBF) additive manufacturing (AM) on fatigue crack growth behavior at room temperature. The characteristic microstructure consists of successive layers of quenched/untempered and tempered martensite formed owing to the cyclic heating and rapid cooling temperature gradients intrinsic to the layer-by-layer deposition. As the laser beam selectively melts a layer of metal powder, it tempers a layer of the material underneath the melt pool, creating the characteristic dual-variant martensite microstructure. Specimens in as-printed, quenched, and tempered conditions of the steel were tested to evaluate the extent to which these microstructural characteristics influence the fatigue crack growth behavior, including the crack propagation paths and rates. The results showed that the tempered layers enhance toughness and resistance to crack propagation, while the quenched layers exhibit higher brittleness and crack growth rates influenced by secondary cracks. The findings suggest that the control of AM processing parameters can optimize microstructure and mechanical properties of the steel, marking an advancement in the design of materials for demanding applications requiring enhanced fatigue resistance and toughness. The Paris law parameters were estimated using the measured data per specimen condition. A crack growth rate exponent of 2.24 and a crack growth rate coefficient of 1.12 × 10⁻⁷ were established for the as-printed material governing an intermediate crack growth behavior compared to the other material conditions. The as-quenched martensite condition exhibited the highest fatigue crack growth rate, while the fully tempered martensite condition showed the lowest crack growth rate. The quality of fits and established parameters for the rate of fatigue crack growth are presented and discussed.</p>\u0000 </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"49 9","pages":"3720-3737"},"PeriodicalIF":3.2,"publicationDate":"2026-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148710475","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 Microstructural Heterogeneities on High-Cycle Fatigue and Subsurface Crack Initiation in Industrially Processed Nb-Microalloyed SAE 4320 Steel","authors":"Leonardo Contri Campanelli,&nbsp;Camila de Brito Ferreira,&nbsp;Anibal de Andrade Mendes Filho,&nbsp;Danieli Aparecida Pereira Reis","doi":"10.1111/ffe.70358","DOIUrl":"https://doi.org/10.1111/ffe.70358","url":null,"abstract":"<div>\u0000 \u0000 <p>This study investigates the effect of microstructural heterogeneities on the high-cycle fatigue (HCF) performance of conventional and Nb-microalloyed SAE 4320 steels processed industrially. Fully reversed fatigue tests (<i>R</i> = −1) using the staircase method were conducted. Although Nb microalloying increased tensile strength, it did not significantly improve the fatigue limit (681 MPa) compared to the conventional steel (718 MPa). Notably, the Nb-microalloyed steel exhibited markedly higher scatter (79 MPa vs. 24 MPa). Fractographic analysis revealed subsurface crack initiation in both alloys, indicating that internal features govern failure. TEM characterization identified fine TiN precipitates (~20 nm) in the conventional steel, whereas the Nb-variant contained coarser NbC precipitates (125–175 nm). These larger particles increased local stress concentrations and statistical dispersion in fatigue life. The findings demonstrate a decoupling between static strength and HCF resistance, emphasizing that microstructural uniformity and precipitate size are critical for fatigue reliability in automotive components.</p>\u0000 </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"49 9","pages":"3888-3895"},"PeriodicalIF":3.2,"publicationDate":"2026-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148710453","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 Properties and Degradation Models for Steel Reinforced Concrete Structures: A Review","authors":"Jiefu Jing,&nbsp;Tong Guo,&nbsp;Chao Wang,&nbsp;Yongming Tu,&nbsp;Jaime Gonzalez-Libreros,&nbsp;Lennart Elfgren,&nbsp;Gabriel Sas","doi":"10.1111/ffe.70301","DOIUrl":"https://doi.org/10.1111/ffe.70301","url":null,"abstract":"<div>\u0000 \u0000 <p>Reinforced concrete structures, over the long term, gradually exhibit fatigue damage as a result of various external factors such as moving loads, temperature variations, and natural disasters. Fatigue refers to the initiation and propagation of cracks, deformation, and cumulative damage under cyclic loading. It is characterized by its hidden, cumulative, and irreversible nature, posing significant threats to structural integrity. We undertook a comprehensive review of fatigue degradation models for reinforced concrete, including a summary of existing fatigue detection methods for concrete, an overview of the fatigue performance of individual material components in reinforced concrete structures, a summary and evaluation of existing fatigue degradation models, a summary of fatigue life prediction methods, and an investigation into the effects of fatigue loading on bond-slip behavior between steel reinforcement and concrete. This review aims to provide a reference for future research on fatigue in reinforced concrete structures.</p>\u0000 </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"49 8","pages":"3131-3164"},"PeriodicalIF":3.2,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148373619","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":"Uncertainty Quantification in Rolling Contact Fatigue Reliability of M50 Steel via Microstructure-Informed Modeling","authors":"Heng Tian,&nbsp;Wenhu Zhang,&nbsp;He Liu,&nbsp;Panlong Wu,&nbsp;Jinbao Huang,&nbsp;Xiaojian Yin,&nbsp;Shuangli He,&nbsp;Jinchao Du,&nbsp;Wanjia Li","doi":"10.1111/ffe.70311","DOIUrl":"https://doi.org/10.1111/ffe.70311","url":null,"abstract":"<div>\u0000 \u0000 <p>Rolling contact fatigue (RCF) failure in M50 bearing steel exhibits pronounced life scatter, arising from both microstructural variability and surface-condition randomness. However, conventional life prediction approaches primarily rely on empirical statistics and cannot quantitatively attribute reliability dispersion to its physical origins. This study develops a microstructure-informed UQ framework to predict M50 bearing steel's RCF reliability and identify life variability sources. Using crystal plasticity–continuum damage models and Voronoi-generated microstructures with randomized grains, combined with stochastic friction coefficients for surface uncertainty, Monte Carlo sampling generates diverse microstructure–friction ensembles. Results reveal load-dependent reliability mechanisms: At low contact pressures, microstructural randomness governs life dispersion via grain-scale stress localization; at higher loads, surface friction uncertainty becomes dominant. This transition correlates with increasing Weibull shape parameters, indicating reduced life scatter under heavier loads. The framework physically identifies reliability-controlling factors, providing a basis for microstructure-driven bearing design and batch consistency evaluation in aerospace components.</p>\u0000 </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"49 8","pages":"3218-3235"},"PeriodicalIF":3.2,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148373031","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":"Study on Fatigue Damage Accumulation and Fatigue Life of Asphalt Binder Under Different Load Levels and Temperatures","authors":"Kang Zhao,&nbsp;Yidong Chai,&nbsp;Duo Meng","doi":"10.1111/ffe.70316","DOIUrl":"https://doi.org/10.1111/ffe.70316","url":null,"abstract":"<div>\u0000 \u0000 <p>Asphalt binder is a critical component of asphalt pavement, and fatigue damage is a primary failure mode. Characterizing its fatigue performance is important for evaluating asphalt pavement performance and design. This study investigates fatigue damage accumulation of 70# asphalt binder under different strain levels and temperatures using time sweep tests. At 20 °C, increasing strain from 1.5% to 3.5% reduces fatigue life from 17,380 to 2020 cycles, an 88.4% reduction. Asphalt undergoes a hardening stage under the action of LVE load. When asphalt is subjected to NLVE fatigue load, plastic flow changes its viscoelastic properties without a hardening stage. Fatigue damage accelerates, and fatigue life decreases with increasing load level and decreasing temperature. A damage accumulation model considering dissipated energy history and a temperature-dependent fatigue life prediction model (\u0000<span></span><math>\u0000 <msub>\u0000 <mi>N</mi>\u0000 <mi>f</mi>\u0000 </msub>\u0000 <mo>=</mo>\u0000 <mn>2.67</mn>\u0000 <mo>×</mo>\u0000 <msup>\u0000 <mn>10</mn>\u0000 <mn>12</mn>\u0000 </msup>\u0000 <mo>×</mo>\u0000 <msup>\u0000 <mfenced>\u0000 <mfrac>\u0000 <mn>1</mn>\u0000 <mrow>\u0000 <mi>ε</mi>\u0000 <msub>\u0000 <mi>G</mi>\u0000 <mn>0</mn>\u0000 </msub>\u0000 </mrow>\u0000 </mfrac>\u0000 </mfenced>\u0000 <mn>1.61</mn>\u0000 </msup></math>) are established based on fatigue test data. Among them, c increasing from 3.72 × 10¹¹ at 10 °C to 2.67 × 10¹² at 20 °C.</p>\u0000 </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"49 8","pages":"3263-3275"},"PeriodicalIF":3.2,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148373325","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}