International Journal of Fatigue最新文献_第5页

Comprehensive study of the structural integrity of a damaged turbine disk using FEM, DIC and phase field methods 利用有限元、DIC 和相场方法全面研究受损涡轮机盘的结构完整性

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2024-11-19 DOI: 10.1016/j.ijfatigue.2024.108720

R. Khamidullin, V. Shlyannikov, D. Kosov, A. Zakharov

{"title":"Comprehensive study of the structural integrity of a damaged turbine disk using FEM, DIC and phase field methods","authors":"R. Khamidullin, V. Shlyannikov, D. Kosov, A. Zakharov","doi":"10.1016/j.ijfatigue.2024.108720","DOIUrl":"10.1016/j.ijfatigue.2024.108720","url":null,"abstract":"<div><div>The aim of this study is the formation and numerical-experimental background of the approach to assessing of the structural integrity based on the principles of tolerance damage and simulation modeling. To this end, constitutive equations of the Lemaitre model and phase field fracture are employed, which include damage functions for the stages of defect appearance and crack growth. A general system of resolving equations of isotropic and kinematic hardening, viscous plasticity and damage is formed, and a method for determining the parameters of these equations is developed and implemented in the ANSIS. The proposed method is invariant to the specific form of the equations and depends only on the nature of the behavior of the continuum. A distinctive feature of the proposed approach is the validation and verification of the low-cycle fatigue and phase field models using a simulation model. Low-cycle fatigue tests with measurements by digital image correlation of the displacement and strain fields around the holes and crack tip in the simulation model were performed. The fatigue lifetime and crack growth predictions are evaluated and compared using simulation model and a damaged in service power steam turbine disc with a blade rivet attachment as a case study.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"192 ","pages":"Article 108720"},"PeriodicalIF":5.7,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142696681","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

Neighborhood and surface effects on polycrystal stress field extreme values: An analysis in linear elastic range by means of cellular automaton

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2024-11-19 DOI: 10.1016/j.ijfatigue.2024.108710

R. Bretin, P. Bocher

{"title":"Neighborhood and surface effects on polycrystal stress field extreme values: An analysis in linear elastic range by means of cellular automaton","authors":"R. Bretin, P. Bocher","doi":"10.1016/j.ijfatigue.2024.108710","DOIUrl":"10.1016/j.ijfatigue.2024.108710","url":null,"abstract":"<div><div>Within polycrystals, significant stress concentrations can arise due to their heterogeneous nature. These stress intensities strongly influence the onset of nonlinear behaviors, such as plasticity and fatigue damage. One often overlooked source of heterogeneity is the crystal anisotropy and its resulting neighborhood effect. Previous research introduced a data-driven analytical model based on a cellular automaton (CA) to account for the neighborhood effect on a grain’s stress level within an infinite aggregate under elastic conditions. It was demonstrated that, in some rare specific cases, grains could experience stress levels twice as high as the applied load. The current work extends the CA model by incorporating the effects of a free surface. Randomly oriented polycrystals under uniaxial loading were studied using a regular aggregate structure (Kelvin structure), where all grains are considered spherical and of identical size. Compared to full-field simulations, the extended CA model demonstrated an excellent capability to capture heterogeneities, even in cases where high stress concentrations are generated by the neighborhood. By leveraging the model’s speed, a distribution function for grain stress levels was optimized to accurately capture the probability of extreme values. This allows for the estimation of the most likely highest stress within randomly oriented aggregates composed of billions of grains, along with its most probable localization relative to a free surface and the specific crystallographic configurations leading to it.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"192 ","pages":"Article 108710"},"PeriodicalIF":5.7,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747484","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}

引用次数: 0

Fatigue strength of blast cleaned and stress relief annealed butt joints made of structural steel S355J2+N for offshore wind support structures

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2024-11-19 DOI: 10.1016/j.ijfatigue.2024.108711

Andreas Gericke , Thomas von Borstel , Göran Gabriel , Malin Strandberg , Knuth-Michael Henkel

{"title":"Fatigue strength of blast cleaned and stress relief annealed butt joints made of structural steel S355J2+N for offshore wind support structures","authors":"Andreas Gericke , Thomas von Borstel , Göran Gabriel , Malin Strandberg , Knuth-Michael Henkel","doi":"10.1016/j.ijfatigue.2024.108711","DOIUrl":"10.1016/j.ijfatigue.2024.108711","url":null,"abstract":"<div><div>The effects of blast cleaning (BC) and stress relief annealing (SRA) on butt joints were investigated. BC leads to a significant increase in fatigue strength due to insertion of compressive residual stresses and cold work hardening at the surface. Additional SRA leads to a decrease of fatigue strength down to the as-welded state. It is shown that the SRA not only leads to a decrease of compressive residual stresses but also to a decrease of cold work hardness at the surface. This shows that SRA is not an appropriate method to show the effect of the reduction of residual stresses in service of mechanical post weld treated weld seams since surface hardness is decreased as well. SRA of as-welded specimens did not lead to an increase in fatigue strength. It is shown that compressive residual stresses and surface hardness are stable under high tensile loads and high cycle numbers. Fatigue tests were accompanied by strain gauge measurements to identify the structural hot-spot stresses in correlation to axial and angular misalignments. A parametric FE model was used to calculate the stress concentration factors and compared to the measured stresses. Angular misalignment shows good correlation with stress increase compared to nominal stresses.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"192 ","pages":"Article 108711"},"PeriodicalIF":5.7,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142747488","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}

引用次数: 0

Effect of temperature on fatigue behavior and deformation mechanisms of nickel-based superalloy SU-263 温度对镍基超合金 SU-263 疲劳行为和变形机制的影响

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2024-11-19 DOI: 10.1016/j.ijfatigue.2024.108721

K. Dinesh , Barun Bharadwaj Dash , R. Kannan , Neeta Paulose , G.V. Prasad Reddy , Hariharan Krishnaswamy , S. Sankaran

{"title":"Effect of temperature on fatigue behavior and deformation mechanisms of nickel-based superalloy SU-263","authors":"K. Dinesh , Barun Bharadwaj Dash , R. Kannan , Neeta Paulose , G.V. Prasad Reddy , Hariharan Krishnaswamy , S. Sankaran","doi":"10.1016/j.ijfatigue.2024.108721","DOIUrl":"10.1016/j.ijfatigue.2024.108721","url":null,"abstract":"<div><div>The LCF behavior of SU-263 was investigated at various temperatures (1073, 1123, and 1173 K) and strain amplitudes of ± 0.4 to 0.8% at a constant strain rate of 3 × 10<sup>-3</sup> s<sup>−1</sup>. The alloy displayed initial hardening followed by extensive cyclic softening until failure. It is observed that the presence of dislocation networks absorbs mobile dislocation, and the shearing of γ′ precipitates were responsible for cyclic softening at 1073 and 1123 K, whereas dissolution of γ′ precipitate and dislocation annihilation were responsible for cyclic softening at 1173 K. At elevated temperatures, the LCF behavior is significantly influenced by time-dependent processes such as dynamic strain aging (DSA), and oxidation. The occurrence of DSA manifests in the form of serrated plastic flow in stress–strain hysteresis loops, reduced half-life plastic strain amplitude, and increased cyclic work hardening. The alloy exhibits linear behavior in the Coffin-Manson (C-M) plot at 1073 and 1173 K. However, the C-M plot shows bi-linear behavior at 1123 K with the corresponding shift in the deformation mechanism at ± 0.5% strain amplitude. This study focuses on understanding the effects of temperature on fatigue behavior and the associated deformation mechanisms by using characterization techniques, such as scanning and transmission electron microscopy.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"192 ","pages":"Article 108721"},"PeriodicalIF":5.7,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142696614","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

Factors determining the torsional fatigue strength in bainitic steels with banded microstructures 决定带状微结构贝氏体钢扭转疲劳强度的因素

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2024-11-17 DOI: 10.1016/j.ijfatigue.2024.108714

Soma Yoshimura , Kentaro Wada , Sungcheol Park , Hisao Matsunaga

{"title":"Factors determining the torsional fatigue strength in bainitic steels with banded microstructures","authors":"Soma Yoshimura , Kentaro Wada , Sungcheol Park , Hisao Matsunaga","doi":"10.1016/j.ijfatigue.2024.108714","DOIUrl":"10.1016/j.ijfatigue.2024.108714","url":null,"abstract":"<div><div>This study aimed to identify the microstructural factors governing the torsional fatigue strength of bainitic steels. Torsional fatigue tests were performed on two bainitic steels with banded microstructures comprised of soft and hard layers. The soft layers were coarse-grained with low Vickers hardness (<em>HV</em>), while the hard layers were fine-grained with high <em>HV</em>. Both materials possessed similar average <em>HV</em> values but differing band morphologies: a coarse band (CB) with <em>HV</em> = 329 and a fine band (FB) with <em>HV</em> = 314. Interestingly, the FB exhibited a 30 % higher fatigue strength than the CB. Through microscopic observations and finite element analysis, it was established that different fatigue strengths could be attributed to the particular width and array of the bands. The reticular band array in the FB steel raises crack initiation resistance due to the constraint of cyclic plastic deformation. In addition, the narrower spacing of hard layers can impede crack propagation when the extension mode transitions from shear mode to Mode I. In contrast, the columnar array and wider spacing of the bands in the CB steel are likely to provide weaker resistance to crack initiation and propagation, resulting in an inferior fatigue strength.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"192 ","pages":"Article 108714"},"PeriodicalIF":5.7,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142696608","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}

引用次数: 0

Rapid fatigue limit estimation of smart polymer-matrix composite under self-heating bending tests using an innovative automatic approach: Knee method 采用创新的自动方法，在自加热弯曲试验中快速估算智能聚合物基复合材料的疲劳极限：膝关节法

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2024-11-16 DOI: 10.1016/j.ijfatigue.2024.108684

L. Dolbachian, W. Harizi, I. Gnaba, Z. Aboura

引用次数: 0

Plasticity-induced crack closure identification during fatigue crack growth in AA2024-T3 by using high-resolution digital image correlation 利用高分辨率数字图像相关技术识别 AA2024-T3 疲劳裂纹生长过程中塑性诱发的裂纹闭合

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2024-11-16 DOI: 10.1016/j.ijfatigue.2024.108703

Florian Paysan, David Melching, Eric Breitbarth

{"title":"Plasticity-induced crack closure identification during fatigue crack growth in AA2024-T3 by using high-resolution digital image correlation","authors":"Florian Paysan, David Melching, Eric Breitbarth","doi":"10.1016/j.ijfatigue.2024.108703","DOIUrl":"10.1016/j.ijfatigue.2024.108703","url":null,"abstract":"<div><div>Fatigue crack growth in ductile materials is primarily driven by the interaction between damaging and shielding mechanisms. In the Paris regime, the predominant mechanism for retardation is plasticity-induced crack closure (PICC). However, some of the mechanisms behind this phenomenon are still unclear. Identifying and separating the three-dimensional aspect from other shielding aspects during experiments is extremely complex. In this paper, we analyze the crack opening kinematics based on local crack opening displacement measurements in both 2D high-resolution digital image correlation data and 3D finite element simulations. The results confirm that the crack opening stress intensity factor <span><math><msub><mrow><mi>K</mi></mrow><mrow><mi>op</mi></mrow></msub></math></span> differs along the crack path. we present a new method to determine <span><math><msub><mrow><mi>K</mi></mrow><mrow><mi>op</mi></mrow></msub></math></span> at the crack front allowing to identify PICC as the predominant shielding mechanism in fatigue crack growth experiments. Furthermore, this work contributes to the discussion on the damage-reducing effect of PICC, since we find that the influence on fatigue damage in the plastic zone remains negligible when the crack is closed and crack surface contact is directed towards the surface.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"192 ","pages":"Article 108703"},"PeriodicalIF":5.7,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142696609","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}

引用次数: 0

Corrosion fatigue behavior of cast iron in simulated combustion product solutions of ammonia and methanol fuels 铸铁在氨和甲醇燃料模拟燃烧产物溶液中的腐蚀疲劳行为

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2024-11-16 DOI: 10.1016/j.ijfatigue.2024.108715

Yong Cai , Ziming Wang , Yihu Tang , Congcong Xu , Yingwei Song , Kaihui Dong , En-Hou Han

引用次数: 0

A novel implementation of the cohesive zone model for the fatigue propagation of delamination in composites using a sequential static fatigue algorithm 使用顺序静态疲劳算法对复合材料分层疲劳传播的内聚区模型进行新的实施

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2024-11-15 DOI: 10.1016/j.ijfatigue.2024.108712

S. Safaei, A. Bernasconi, M. Carboni, L. Martulli

{"title":"A novel implementation of the cohesive zone model for the fatigue propagation of delamination in composites using a sequential static fatigue algorithm","authors":"S. Safaei, A. Bernasconi, M. Carboni, L. Martulli","doi":"10.1016/j.ijfatigue.2024.108712","DOIUrl":"10.1016/j.ijfatigue.2024.108712","url":null,"abstract":"<div><div>Composite materials are particularly exposed to delamination under fatigue loading conditions, which can significantly compromise their structural integrity. The ability to accurately and efficiently estimate the progression of delamination under fatigue is crucial for enhancing the safety and reliability of lightweight composite structures. The aim of this paper is to implement the cohesive elements formulation in a Sequential Static Fatigue (SSF) algorithm named C-SSF. The C-SSF algorithm simulates delamination propagation under fatigue loading by conducting a series of sequential static simulations. The accuracy of the C-SSF method is validated by comparing its results with experimental data from two published case studies. The results demonstrate that this approach can effectively simulate delamination growth under fatigue loading. Compared to a similar approach based on the Virtual Crack Closure Technique (VCCT), the C-SSF algorithm provided superior accuracy, especially when large and curved delamination fronts were involved. The C-SSF method proved its capability to simulate propagation of delamination in composite structures, making it a valuable tool for modelling the fatigue behaviour of other similar structures.</div></div>","PeriodicalId":14112,"journal":{"name":"International Journal of Fatigue","volume":"192 ","pages":"Article 108712"},"PeriodicalIF":5.7,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142702108","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

Experimental evaluation of multiaxial test-tailored specifications based on Fatigue Damage multi-Spectra 基于疲劳损伤多光谱的多轴测试定制规范的实验评估

IF 5.7 2区材料科学

International Journal of Fatigue Pub Date : 2024-11-15 DOI: 10.1016/j.ijfatigue.2024.108702

M. Aimé , A. Banvillet , L. Khalij , E. Pagnacco , E. Chatelet , R. Dufour

引用次数: 0