Fatigue & Fracture of Engineering Materials & Structures最新文献

An Analytical Approach for the Near-Tip Field Around V-Notch in Orthotropic Materials

IF 3.1 2区材料科学

Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2024-11-05 DOI: 10.1111/ffe.14475

Adel Esmaeili, Amin Kuhzadmohammadi, Majid Safarabadi

{"title":"An Analytical Approach for the Near-Tip Field Around V-Notch in Orthotropic Materials","authors":"Adel Esmaeili, Amin Kuhzadmohammadi, Majid Safarabadi","doi":"10.1111/ffe.14475","DOIUrl":"https://doi.org/10.1111/ffe.14475","url":null,"abstract":"<div>\u0000 \u0000 This study introduces a novel theoretical framework for determining the notch stress intensity factors (NSIFs) in composite materials. The approach involves utilizing Irwin's complex stress functions for Mode I and Mode II loading conditions. By investigating displacement and singular stress components around V-notch tips, the research aims to provide a comprehensive understanding of NSIFs in composite materials. Three different composite materials were considered in the study to explore the relationship between stress and material properties. The stress singularity order, denoted as \u0000<math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>λ</mi>\u0000 </mrow>\u0000 <annotation>$$ lambda $$</annotation>\u0000 </semantics></math>, is determined through eigenequations. Moreover, explicit solutions for displacement and singular stress fields are derived for a more thorough understanding of the behavior around notches in composite materials. To validate the proposed theoretical framework, a rigorous numerical study is conducted using FEM on finite-size notches. The results obtained from the numerical simulations are compared with theoretical predictions to assess the accuracy and reliability of the developed approach.\u0000 </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"48 1","pages":"487-501"},"PeriodicalIF":3.1,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142868108","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

Feature Transfer Learning for Fatigue Life Prediction of Additive Manufactured Metals With Small Samples

IF 3.1 2区材料科学

Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2024-11-04 DOI: 10.1111/ffe.14497

Hao Wu, Zhi-Ming Fan, Lei Gan

引用次数: 0

Effect of Cyclic Load Frequency on the Fatigue Crack Nucleation and Growth of Annealed and Prestrained Austenitic SS 304

IF 3.1 2区材料科学

Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2024-11-03 DOI: 10.1111/ffe.14484

Brenno L. Nascimento, Iris S. Santos, Luiara L. Santos, Matheus M. S. Reis, Ihana G. C. de Jesus, Sandro Griza

{"title":"Effect of Cyclic Load Frequency on the Fatigue Crack Nucleation and Growth of Annealed and Prestrained Austenitic SS 304","authors":"Brenno L. Nascimento, Iris S. Santos, Luiara L. Santos, Matheus M. S. Reis, Ihana G. C. de Jesus, Sandro Griza","doi":"10.1111/ffe.14484","DOIUrl":"https://doi.org/10.1111/ffe.14484","url":null,"abstract":"<div>\u0000 \u0000 The austenitic stainless steels are widely used in several engineering fields due to their high ductility, corrosion and high temperature performance. Despite its noble properties, components manufactured in austenitic stainless steel are subject to fatigue failure. Studies indicate that loading frequency can impact the austenitic stainless steel fatigue performance. In this scenario, the present study aims to evaluate the effect of frequencies of 3 and 30 Hz on the fatigue behavior of SS 304 alloy under load control in order to identify in which fatigue stage the effect is outstanding. Therefore, fatigue and fracture mechanics tests were evaluated on the alloy annealed at 1000°C. Furthermore, fatigue tests were also applied to the alloy after previous tensile plastic strain of 0.5. The analyses denoted a significant reduction in fatigue strength with increasing frequency, especially for the strained alloy. Fatigue crack nucleation is encouraged with greater load frequency. This behavior may be attributed to strain-induced martensite and other strain mechanisms such as twinning and slip bands that are encouraged by lower strain rates but are relieved by auto-heating achieved in higher frequencies, as mentioned in the literature, which decrease the strength to fatigue nucleation.\u0000 </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"48 1","pages":"441-453"},"PeriodicalIF":3.1,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142869265","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

Relation Between Striations Spacing and Fatigue Crack Growth Rates for Additive Manufactured Inconel 625

IF 3.1 2区材料科学

Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2024-11-03 DOI: 10.1111/ffe.14493

Felipe Klein Fiorentin, Rita Dantas, Roya Darabi, Grzegorz Lesiuk, Miguel Figueiredo, Paulo Tavares de Castro, Abílio de Jesus

{"title":"Relation Between Striations Spacing and Fatigue Crack Growth Rates for Additive Manufactured Inconel 625","authors":"Felipe Klein Fiorentin, Rita Dantas, Roya Darabi, Grzegorz Lesiuk, Miguel Figueiredo, Paulo Tavares de Castro, Abílio de Jesus","doi":"10.1111/ffe.14493","DOIUrl":"https://doi.org/10.1111/ffe.14493","url":null,"abstract":"<div>\u0000 \u0000 The principles of the mechanisms for fatigue crack propagation in metals have been established several decades ago. By definition, fatigue might be summarized as a damage process imparted to a material under the action of cyclic loads. The relation between fatigue crack growth rates (FCGRs) and formation of striation marks has been a controversial topic. Some authors stated that, in certain fatigue regimes, several fatigue cycles are required to form a single striation. The disagreement found was the motivation for the present work. This study's main goal is to provide a comparison between the striation spacing and the respective FCGR. These analyses will be performed in a Nickel superalloy, Inconel 625, obtained via directed energy deposition. Investigation of the striations spacing are compared with data obtained from FCGR tests. A good agreement between striation spacing and FCGRs was found to intermediate and large values of stress intensity factor.\u0000 </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"48 1","pages":"454-466"},"PeriodicalIF":3.1,"publicationDate":"2024-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142869262","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 Two-Scale Model of Fretting Fatigue Crack Initiation Life Based on Long Short-Term Memory Networks Improved by Genetic Algorithm

IF 3.1 2区材料科学

Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2024-11-03 DOI: 10.1111/ffe.14487

Yazhou Xu, Yue Wu, Fang Yuan, Yangmin Feng, Bin Hao

引用次数: 0

Impact of SCB Specimen Size, Temperature, Loading Rate, and Loading Mode on Fracture Behavior of Asphalt Mixture Using Response Surface Method

IF 3.1 2区材料科学

Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2024-10-31 DOI: 10.1111/ffe.14474

Zahra Vaseghi, Sadjad Pirmohammad, Ramin Momeni

{"title":"Impact of SCB Specimen Size, Temperature, Loading Rate, and Loading Mode on Fracture Behavior of Asphalt Mixture Using Response Surface Method","authors":"Zahra Vaseghi, Sadjad Pirmohammad, Ramin Momeni","doi":"10.1111/ffe.14474","DOIUrl":"https://doi.org/10.1111/ffe.14474","url":null,"abstract":"<div>\u0000 \u0000 This study aimed to investigate the influence of semicircular bend (SCB) specimen size (R), loading mode (Me), and loading rate (Lr) on fracture resistance indicators, namely, fracture work (Wf), fracture energy (Gf), and fracture strength (Kf), of asphalt concrete at three different temperatures (−30°C, −20°C, and 10°C). Using Minitab software, response surface methodology (RSM) under central composite design (CCD) was employed to design experiments and develop predictive models for Wf, Gf, and Kf in terms of R, Me, and Lr at each temperature. The results demonstrated that the RSM models accurately predicted the fracture test data for all temperatures. The analysis of variance (ANOVA) revealed that R, Me, and Lr significantly influenced Wf, Gf, and Kf at each temperature, whereas the square terms R2, Me2, and Lr2 were not significant. The significance of two-way interaction terms varied across different responses and temperatures. Overall, the experiments conducted at −30°C, −20°C, and 10°C indicated that varying R, Lr, and Me had notable effects on Wf, Gf, and Kf. Increasing R and Me while decreasing Lr resulted in an increase in Wf and Gf. Furthermore, Kf exhibited a direct relationship with R and Lr but an inverse relationship with Me.\u0000 </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"48 1","pages":"382-403"},"PeriodicalIF":3.1,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142869227","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

Research on the P-S-N Curve Fitting Method of Notched Specimens Considering Small Sample Properties

IF 3.1 2区材料科学

Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2024-10-31 DOI: 10.1111/ffe.14490

Ziyang Zhang, Jianhui Liu, Juntai Hu, Qingjun Wu, Shenglei Wu

{"title":"Research on the P-S-N Curve Fitting Method of Notched Specimens Considering Small Sample Properties","authors":"Ziyang Zhang, Jianhui Liu, Juntai Hu, Qingjun Wu, Shenglei Wu","doi":"10.1111/ffe.14490","DOIUrl":"https://doi.org/10.1111/ffe.14490","url":null,"abstract":"<div>\u0000 \u0000 Aiming at the issue of fatigue test data for large-scale mechanical components of building steel are very limited, a method for fitting P-S-N curves under small sample data of notched specimens is proposed to predict fatigue life. First, a fatigue life subsample augmented and its reliability assessment method are established, based on Bayesian hierarchical modeling and modified Monte Carlo method. Second, a clustering combination weighting method is proposed, to define weights of hidden variables of the binomial mixture Weibull distribution, and the expectation–maximization algorithm is used to determine probability density function of the distribution. Finally, the P-S-N curves under various failure probabilities are fitted with Weibull distributed life models, and the convergence and prediction accuracy of the different models are compared. The results show that the fatigue data of small samples can be predicted better by using mixed Weibull distribution, and the fitting P-S-N curve is more reliable and accurate.\u0000 </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"48 1","pages":"404-422"},"PeriodicalIF":3.1,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142869228","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

Statistical Lifetime of Composites Subjected to Random and Ordered Block Loadings

IF 3.1 2区材料科学

Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2024-10-30 DOI: 10.1111/ffe.14488

Alberto D'Amore, Luigi Grassia

{"title":"Statistical Lifetime of Composites Subjected to Random and Ordered Block Loadings","authors":"Alberto D'Amore, Luigi Grassia","doi":"10.1111/ffe.14488","DOIUrl":"https://doi.org/10.1111/ffe.14488","url":null,"abstract":"<div>\u0000 \u0000 This study presents a procedure based on constant amplitude (CA) fatigue data to predict the statistical fatigue lifetime of glass/orthopolyester composites subjected to repeated ordered and random two, three, and six sequences of block loadings. A numerical routine was developed to detect cycle-by-cycle the statistical strength degradation progression until failure, assuming that the strength at the end of a block cycle equals the strength at the start of the successive one and that the individual samples' static strength, the amount of degraded strength, and fatigue life share the same rank in their respective cumulative distribution function. Predictions conform to the statistically undetectable loading sequence effects and lightly overestimate the lifetimes of random and ordered high-to-low (1/100 cycles) repeated two-block loadings. The vanishing effect of the loading sequence when the block extents remain fixed, the block extent effects for a given three-block sequence, and the lifetimes of three-block loadings were fully predicted. The six-block sequence's experimental lifetimes with different block loading orders and block extent fell within the predicted lifetimes' cumulative distribution function. A reliable damage rule based on residual strength was proposed and compared to the Miner's rule.\u0000 </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"48 1","pages":"359-370"},"PeriodicalIF":3.1,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142869225","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 Surface Roughness and Compressive Residual Stress on the Fatigue Performance of TC4 Titanium Alloy Subjected to Laser Shock Wave Planishing

IF 3.1 2区材料科学

Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2024-10-30 DOI: 10.1111/ffe.14472

Lei Wu, FengZe Dai, XiZhang Chen

引用次数: 0

Prediction of Rubber Fatigue Life Using an Assimilation-based Learning Approach and Incremental Crack Propagation Model

IF 3.1 2区材料科学

Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2024-10-29 DOI: 10.1111/ffe.14495

Congzhuo Fang, Yanfu Chen, Zihao Yang, Yiyuan Zhang, Xindang He

{"title":"Prediction of Rubber Fatigue Life Using an Assimilation-based Learning Approach and Incremental Crack Propagation Model","authors":"Congzhuo Fang, Yanfu Chen, Zihao Yang, Yiyuan Zhang, Xindang He","doi":"10.1111/ffe.14495","DOIUrl":"https://doi.org/10.1111/ffe.14495","url":null,"abstract":"<div>\u0000 \u0000 Accurately and efficiently predicting the fatigue life of rubber materials has been a long-standing challenge due to limited understanding of the fatigue mechanism. In this study, a variational assimilation-based machine learning method assisted with incremental crack propagation model is proposed to predict the fatigue life of rubber materials. Firstly, according to the fracture mechanics theory, a new rubber fatigue life prediction model based on incremental crack propagation and sparse experimental data is established, which owns higher accuracy than the classical crack energy density model. Further, a rubber fatigue life solver coupled incremental crack propagation model and nonlinear finite element method is introduced to generate a dense fatigue life dataset of rubber materials with high accuracy. Finally, the artificial neural network model is trained, cross-validated, and tested using the dense dataset, and the three-dimensional variational assimilation model is employed to merge the predicted values of artificial neural network with experimental data. By comparing against the experimental data, the effectiveness of the proposed method was verified; thereby, we offer an accurate and efficient approach to predict the rubber fatigue life.\u0000 </div>","PeriodicalId":12298,"journal":{"name":"Fatigue & Fracture of Engineering Materials & Structures","volume":"48 1","pages":"312-323"},"PeriodicalIF":3.1,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142869211","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