{"title":"Damage Analyses and Crack Propagation of Wire Drawing With Central Inclusion Under Different Compression Ratios","authors":"Ao Ma, Feng Fang, Zhaoxia Li","doi":"10.1111/ffe.14637","DOIUrl":"https://doi.org/10.1111/ffe.14637","url":null,"abstract":"<div>\u0000 \u0000 <p>The problem of wire breaking in the production of steel cord has always attracted much attention. The research on the mechanism of crack propagation caused by drawing damage is still to be urgently solved in engineering. Therefore, the fracture morphology of cord steel during drawing and the internal micro-defects of steel wire are analyzed by SEM. On this basis, a continuous multi-pass drawing model of steel wire with central inclusions under different compression ratios is established by FEM. The process of crack propagation caused by damage is realized in the simulation. The results show that the larger the size of the inclusion is, the easier it is to form a V-shaped crack propagation path at the front of the inclusion. With the decrease of the compression ratio under the total drawing strain, the internal damage increment of the steel wire increases gradually after multi-pass drawing, which will increase the failure probability of the steel wire as a whole. In particular, the damage of the intact steel wire increases linearly when the compression ratio <i>R</i> = 12%. After seven-pass drawing, the maximum damage value reaches 0.117, which increases by 0.049 and 0.032 compared with the compression ratio <i>R</i> = 20% and <i>R</i> = 16%, respectively.</p>\u0000 </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"48 6","pages":"2743-2758"},"PeriodicalIF":3.1,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143909337","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}
Matteo Montanari, Roberto Brighenti, Silvia Monchetti, Andrea Spagnoli
{"title":"Indentation and Puncturing of Pristine and Flawed Soft Membranes","authors":"Matteo Montanari, Roberto Brighenti, Silvia Monchetti, Andrea Spagnoli","doi":"10.1111/ffe.14640","DOIUrl":"https://doi.org/10.1111/ffe.14640","url":null,"abstract":"<p>This paper investigates the mechanical behavior of soft elastomeric membranes under indentation by a rigid spherical object, with a particular focus on the failure mechanisms leading to puncture. The study examines both pristine membranes and those with pre-existing flaws, such as cracks, to explore how these imperfections affect the mechanical response and failure characteristics. An analytical axisymmetric model, based on a nonlinear solution for a hyperelastic, incompressible membrane, is presented. The prediction of the model are validated with experimental data obtained from indentation tests on silicone membranes. The study considers both stretch-based and energy-based criteria for fracture, providing insight into the conditions necessary for membrane failure and crack propagation.</p>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"48 6","pages":"2787-2800"},"PeriodicalIF":3.1,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ffe.14640","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143909338","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}
Xiao-Long Li, Yu-Ke Liu, Zi-Wei Wang, Rong Chen, Ming-Liang Zhu
{"title":"In Situ Observation of Small Crack Growth and Fatigue Life Modeling for In713C Ni-Based Superalloy","authors":"Xiao-Long Li, Yu-Ke Liu, Zi-Wei Wang, Rong Chen, Ming-Liang Zhu","doi":"10.1111/ffe.14635","DOIUrl":"https://doi.org/10.1111/ffe.14635","url":null,"abstract":"<div>\u0000 \u0000 <p>Fatigue failure has a considerable impact on the safety of equipment in service. The fatigue crack growth behavior of a Ni-based superalloy was investigated by in situ fatigue testing. The results showed that microstructurally small crack growth speed followed a “V-shaped” pattern. Notch effect activated multiple slip systems, and small cracks within grains tended to grow along slip bands parallel with {111} planes. Moreover, due to obstructive effects of cross-slip, grain boundaries, and carbides, the growth path was deflected. During this process, plastic deformation at the crack tip caused grains to rotate, with angular changes ranging from 6° to 10°. Finally, based on the fatigue crack growth mechanism, models for microstructurally small and long crack growth rates to predict the high-cycle/very-high-cycle fatigue life were established. The predicted results were within factors of three for surface failure and two for interior failure.</p>\u0000 </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"48 6","pages":"2774-2786"},"PeriodicalIF":3.1,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908895","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":"Dynamic Fracture Characteristics of Layered Rock Mass With Two Beddings Under Explosive Loads of Slotted Charges","authors":"Xu Wang, Zhongwen Yue, Kejun Xue, Huang Wang, Meng Ren, Zifan Cheng, Linzhi Peng","doi":"10.1111/ffe.14634","DOIUrl":"https://doi.org/10.1111/ffe.14634","url":null,"abstract":"<div>\u0000 \u0000 <p>A large number of beddings inside layered rock masses can significantly affect the dynamic fracture characteristics of the rock mass. In this study, the propagation process of explosive cracks in layered rock masses was visualized using digital image correlation combined with high-speed photography technology, focusing on the dynamic fracture mechanical behavior of layered rock masses with two beddings under an explosive load of slotted charges. The results indicate that, in the fracture process of layered rock masses, a large number of microscopic cracks in the front area of the crack tip are continuously activated, developed, and fused, ultimately converging into macroscopic main cracks that can cause fracture failure. During the dynamic fracture process of the layered rock masses, the displacement field of the specimen exhibited a clear gradient, with obvious displacement contour lines appearing and no discontinuity in the contour lines at the beddings. Under the premise of an appropriate spacing between the two beddings, the continuous reflection and superposition of stress waves between the two beddings causes the rock mass to crack again, resulting in secondary cracks. Vertical bedding has an inhibitory effect on the propagation behavior of the main explosive crack.</p>\u0000 </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"48 6","pages":"2725-2742"},"PeriodicalIF":3.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908984","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}
Rong Chen, Jing-Bo Zhao, De-Jiang Li, Ming-Liang Zhu, Fu-Zhen Xuan
{"title":"The Dual Role of Twinning Deformation in a Magnesium Alloy up to Very High Cycle Fatigue Regime","authors":"Rong Chen, Jing-Bo Zhao, De-Jiang Li, Ming-Liang Zhu, Fu-Zhen Xuan","doi":"10.1111/ffe.14643","DOIUrl":"https://doi.org/10.1111/ffe.14643","url":null,"abstract":"<div>\u0000 \u0000 <p>In this work, push–pull cyclic loading tests were conducted on a LA42 alloy up to the very high cycle regime to understand the effects of internal defects and microstructural damage on the fatigue mechanisms. The <i>S</i>–<i>N</i> curve shows a bilinear pattern with fatigue crack initiation characterized by multiple internal crack initiation sites, interior shrinkage connection, and microstructural damage induced facet formation. It is found that apart from the basal slip, the twinning deformation played dual roles in microstructural damage and fatigue crack initiation. Under larger plastic deformations, twinning improved the strain compatibility between adjacent grains relaxing matrix damage, and most of the crack initiation occurred at interior shrinkages. In contrast, twinning proliferated with long life under low strains, which enhanced the interaction between dislocation slip and twinning, promoting the formation of interior facets under shear stress. The varied roles of twinning deformation in the magnesium alloy suggest that the traditional fatigue limit does not exist during long-term cyclic loading.</p>\u0000 </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"48 6","pages":"2759-2773"},"PeriodicalIF":3.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143908985","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}
Yahia Halabi, Hu Xu, Zhixiang Yu, Wael Alhaddad, Yang Cheng, Changgen Wu
{"title":"Predictive Modeling of Tensile Fracture in Synthetic Fiber Ropes Using Generalized Additive Models","authors":"Yahia Halabi, Hu Xu, Zhixiang Yu, Wael Alhaddad, Yang Cheng, Changgen Wu","doi":"10.1111/ffe.14631","DOIUrl":"https://doi.org/10.1111/ffe.14631","url":null,"abstract":"<div>\u0000 \u0000 <p>This study investigates the tensile failure behavior of synthetic fiber ropes composed of nylon (6-PA), polypropylene (i-PP), and polyester (PET) fibers. A comprehensive experimental program was conducted using 202 rope specimens, with nominal diameters ranging from 4 to 20 mm, subjected to monotonic and cyclic loading conditions. The resulting load–strain data were systematically compiled for advanced statistical analysis. Generalized additive models (GAMs) were developed using R programming to predict failure forces and strains, incorporating a Weibull distribution framework for failure responses. The GAM approach demonstrated superior predictive capability, revealing a linear correlation between rope diameter and failure strain across all materials, as well as a nonlinear relationship between diameter and failure force. Notably, GAM models utilizing natural-spline representations exhibited enhanced performance over conventional Weibull models. These findings contribute to a deeper understanding of the tensile properties of synthetic ropes, offering a data-driven approach to optimize testing efforts and improve the reliability of these materials for engineering applications.</p>\u0000 </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"48 6","pages":"2686-2707"},"PeriodicalIF":3.1,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143909500","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}
Bing Yang, Zhe Zhang, Hai Deng, Mingyang Ma, Jinbang Liu, Wenyang Shao, Chao Wang, Shoune Xiao, Guangwu Yang, Tao Zhu
{"title":"Fatigue Strength Prediction and Degradation Behavior Analysis of 6005A-T6 Aluminum Alloy Considering Fatigue Aging Effects","authors":"Bing Yang, Zhe Zhang, Hai Deng, Mingyang Ma, Jinbang Liu, Wenyang Shao, Chao Wang, Shoune Xiao, Guangwu Yang, Tao Zhu","doi":"10.1111/ffe.14632","DOIUrl":"https://doi.org/10.1111/ffe.14632","url":null,"abstract":"<div>\u0000 \u0000 <p>This study conducts an in-depth analysis of the mechanical property changes of 6005A-T6 aluminum alloy under different fatigue aging states (the process in which the material's performance gradually deteriorates over time under cyclic loading). First, the evolution of surface displacement fields was analyzed using digital image correlation combined with various levels of fatigue aging pretreatment. Through single-cycle tests and tensile tests, the displacement field responses of the material in different degradation states were examined, and changes in ultimate strength, yield strength, elongation, and section shrinkage were further analyzed. Based on the existing yield strength-tensile strength-fatigue strength (Y-T-F) model, an improved approach, the Y-T-F-II model, was proposed to account for fatigue aging effects and validated for fatigue strength prediction, achieving a maximum error of only 0.17%. The results showed that fatigue aging significantly affects the fatigue strength, ductility, and toughness of 6005A-T6 aluminum alloy, and the improved model provides more accurate fatigue strength predictions under various degradation states.</p>\u0000 </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"48 6","pages":"2669-2685"},"PeriodicalIF":3.1,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143909499","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":"Fracture and Damage Analysis of Cement-Stabilized Fine and Coarse Grain Soils Under Static and Cyclic Loading Using Chevron-Notched SCB Specimen","authors":"Nazife Erarslan, M. R. M. Aliha","doi":"10.1111/ffe.14598","DOIUrl":"https://doi.org/10.1111/ffe.14598","url":null,"abstract":"<p>Fracture toughness and cohesive fracturing properties of two classes of sandy-clay soils, (A) with fine and (B) coarse grains and stabilized with low (2%) and high (10%) cement (as soil stabilizer), were investigated using a chevron-notched semicircular bend (CN-SCB) sample under static and cyclic loads. The samples with coarser grains and higher amounts of cement stabilizer showed higher <i>K</i><sub>Ic</sub> compared to the soils containing low cement and fine grains. A noticeable reduction in <i>K</i><sub>Ic</sub> was also observed under cyclic loading compared to the monotonic loading. Load-crack opening displacement (COD) graphs obtained during cyclic loading showed high plastic deformation accumulation before the final fracture. The cycles required for the fatigue crack growth of the Class “A” soil were noticeably (three to six times) higher than the Class “B.” The FRANC2D nonlinear simulations, cohesive fracture analyses, and maximum stress theory were utilized for estimating the critical crack length and the onset of cohesive unstable crack propagation.</p>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"48 6","pages":"2708-2724"},"PeriodicalIF":3.1,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ffe.14598","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143909501","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}
Alireza Daneshyar, Dorina Siebert, Christina Radlbeck, Stefan Kollmannsberger
{"title":"A Plastic Damage Model With Mixed Isotropic–Kinematic Hardening for Low-Cycle Fatigue in 7020 Aluminum","authors":"Alireza Daneshyar, Dorina Siebert, Christina Radlbeck, Stefan Kollmannsberger","doi":"10.1111/ffe.14623","DOIUrl":"https://doi.org/10.1111/ffe.14623","url":null,"abstract":"<p>The paper at hand presents a new numerical model based on experimental investigations of the low-cycle fatigue behavior of the high-strength aluminum alloy EN AW-7020 T6. The developed plastic damage model is based on J2 plasticity with Charboche-type mixed kinematic hardening blended with a suitable isotropic hardening. However, a detailed investigation reveals that for EN AW-7020 T6, the model must be augmented with a damage growth model to accurately describe cyclic fatigue including large plastic strains. Different stress splits are tested, whereby the deviatoric/volumetric split is successful in reproducing the desired degradation in peak stress and stiffness. The model includes a nonlinear activation function to ensure smooth transitions between tension and compression and a damage index for the deviatoric part and for the volumetric part. The plasticity model is calibrated using finite element simulations of a dog-bone specimen and applied to the cyclic loading of a compact tension specimen.</p>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"48 6","pages":"2649-2668"},"PeriodicalIF":3.1,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/ffe.14623","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143909606","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}
Yachuan Kuang, Guangwei Wang, Runan Tian, Chang He, Fan Fan, Weikang Li, Wei Pang
{"title":"A Fatigue Life Prediction Model of Stud Based on Damage Mechanics","authors":"Yachuan Kuang, Guangwei Wang, Runan Tian, Chang He, Fan Fan, Weikang Li, Wei Pang","doi":"10.1111/ffe.14629","DOIUrl":"https://doi.org/10.1111/ffe.14629","url":null,"abstract":"<div>\u0000 \u0000 <p>This study investigates the fatigue life of studs in steel-concrete composite beams through an analysis of their fatigue damage mechanism based on damage mechanics theory. A fatigue life prediction model based on damage mechanics is derived, incorporating the service conditions of studs and the influence of fatigue stress ratio. Seventy-two sets of stud fatigue test data from domestic and international sources were collected. MATLAB software was utilized to fit the relevant parameters of the fatigue life prediction model. The proposed prediction model was verified using another 20 sets of fatigue test data and compared with the typical models. The results indicate that the proposed damage mechanics-based model exhibits high accuracy and stable predictions across varying fatigue stress amplitudes. Furthermore, the fatigue stress ratio significantly affects the fatigue life of studs. An increase in the fatigue stress ratio from 0.3 to 0.7 reduces the fatigue life of studs by approximately 50%.</p>\u0000 </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"48 6","pages":"2618-2632"},"PeriodicalIF":3.1,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143909607","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}