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Evaluating the damage tolerant behavior of cold spray repaired aluminum alloys Int. J. Fatigue (IF 5.7) Pub Date : 2024-09-12 Patrick E. Morrison, Krzysztof S. Stopka, John I. Ferguson, Michael D. Sangid
Cold spray presents a promising solution for repair of damaged material within high-value components. However, before employing cold spray for component repair, it is crucial to assess its damage tolerance and durability. This study focuses on evaluating the fatigue behavior of helium-sprayed AA6061 applied to an A356-T6 cast substrate compared to the same specimen geometry made entirely of the A356-T6
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Standard specimen geometries do not always lead to consistent fatigue results for epoxy adhesives Int. J. Fatigue (IF 5.7) Pub Date : 2024-09-12 Filippo Mannino, Dharun V. Srinivasan, Daniele Fanteria, Anastasios P. Vassilopoulos
This paper questions the recommendation regarding the use of standard specimen geometries, (Type I, Type II, and Type IV), for estimating the tensile quasi-static and fatigue properties of structural epoxy adhesives. The work presents results from an experimental program investigating the performance of structural epoxy adhesives indicating a significant effect of the specimen geometry, especially
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A stacking ensemble model for predicting the flexural fatigue life of fiber-reinforced concrete Int. J. Fatigue (IF 5.7) Pub Date : 2024-09-12 Wan-lin Min, Wei-liang Jin, Yen-yi Hoo, Hailong Wang, Xiaoyu He, Yongke Wei, Jin Xia
The incorporation of fibers into concrete enhances its fatigue resistance while also increasing the variability in flexural fatigue life, necessitating the development of advanced predictive models. To address this challenge, this study innovates by developing a stacking ensemble prediction model aimed at accurately predicting the flexural fatigue life of fiber-reinforced concrete (FRC). This model
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A phase field framework for corrosion fatigue of carbon steel Int. J. Fatigue (IF 5.7) Pub Date : 2024-09-10 Yuan-Zuo Wang, Jing-Zhou Zhang, Lu Yang, Xiu-Li Du
Corrosion fatigue damage occurs when metallic materials are subjected to cyclic loading in a corrosive medium. In this study, a phase field framework is proposed to predict the corrosion fatigue of carbon steels. The coupling effect of fatigue and corrosion is explicitly implemented in the proposed phase field framework by coupling the displacement field, electrochemical field and phase field. A degradation
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Fatigue performance of a fastener hole treated by a novel electromagnetic strengthening process Int. J. Fatigue (IF 5.7) Pub Date : 2024-09-10 Huihui Geng, Xiaofei Xu, Zhipeng Lai, Mengyuan Gong, Quanliang Cao, Shaowei Ouyang, Liang Li
In this study, a novel non-contacting electromagnetic cold expansion process was proposed to improve the fatigue performance of hole component using a single power supply and a single coil. The stress state and deformation of the 6063-T6 aluminum alloy hole component during the electromagnetic strengthening process were investigated through numerical simulation. The residual stress around the hole
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A modified cyclic elastoplastic constitutive model considering the variational dynamic recovery term of back stress for FGH95 under asymmetrical cyclic loading Int. J. Fatigue (IF 5.7) Pub Date : 2024-09-10 Mengsen Qin, Chuanyong Chen, Haijun Xuan, Yang Liu, Bin Huang
The asymmetric cyclic loading process occurs in aero-engine turbine discs. A constitutive model that accurately describes the cyclic elastoplastic behaviour of the material is important for structural design and low cycle fatigue life prediction of turbine discs. In this paper, the low cycle fatigue test of FGH95 was carried out at 620℃ under 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1.0% and 1.1% strain amplitude
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Prediction model of fatigue crack propagation life of corroded steel plate considering pit characteristics Int. J. Fatigue (IF 5.7) Pub Date : 2024-09-07 Jiebin Wu, Shanhua Xu, Anbang Li, Bin Wang, Youde Wang
Pitting corrosion notably increases stress concentration, thus accelerating fatigue crack initiation and propagation at the pit base. This research quantifies the relationship between pit dimensions and fatigue crack development by introducing crack extension ratios ( and ). Employing a series of finite element models, the influence of pit characteristics on the stress intensity factor () at the
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The fatigue mechanism and a new defect-based life prediction model for selective laser melted Al-Mg-Sc-Zr alloy Int. J. Fatigue (IF 5.7) Pub Date : 2024-09-06 Jun Zou, Xiaoyu Xia, Zhenyu Feng, Jizhen Wang, Yazhou Guo, Daiyang Gao
Additive manufacturing (AM) has broad application prospects in the field of aviation, whereas it remains a challenge to fully eliminate the manufacturing defects. As a result, the fatigue performance is poor and has a large scatter. The fatigue performance and life prediction method have become a major hindrance for the application of AM in aviation field. In this paper, the microstructure and defect
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Explainable machine learning-based fatigue assessment of 316L stainless steel fabricated by laser-powder bed fusion Int. J. Fatigue (IF 5.7) Pub Date : 2024-09-05 Xiru Wang, Moritz Braun
Additive manufacturing (AM) and in particular laser-powder bed fusion has become a popular manufacturing techniques in recent years due to its significant advantages; however, the mechanical behavior of AM components often varies from components fabricated using conventional processes. For example, the fatigue behavior of components made by AM processes is heavily influenced by process-related defects
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Prediction of low cycle fatigue life for neutron-irradiated and nonirradiated RAFM steels using their tensile properties Int. J. Fatigue (IF 5.7) Pub Date : 2024-09-04 Hussein Zahran, Aleksandr Zinovev, Dmitry Terentyev, Giacomo Aiello, Magd Abdel Wahab
Reduced Activation Ferritic-Martensitic (RAFM) steels are the candidate structural steels for In-Vessel Components of fusion reactors. Since the operation of a tokamak-type fusion reactor is cyclic by its nature, thermomechanical fatigue will be one of the limiting factors defining the life of the plasma-facing components exposed to neutron irradiation. The assessment of fatigue life requires considerable
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Development of a novel approach to correlate small punch fatigue with uniaxial ratcheting fatigue Int. J. Fatigue (IF 5.7) Pub Date : 2024-09-03 Aishwary Vardhan Pandey, K. Mariappan, V. Karthik, Vani Shankar, R. Divakar
The miniaturization of fatigue specimens has seen significant advancements, realized either by scaling down conventional specimens while preserving their geometry or by experimenting with novel specimen shapes and loading configurations. In this study, the small punch test (SPT) technique, which is well-established for estimating tensile, creep, and ductile-to-brittle transition temperature (DBTT)
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Thermo-mechanical coupling failure mechanisms of reusable SiCf/SiC composites with PyC interphase Int. J. Fatigue (IF 5.7) Pub Date : 2024-09-01 Peifei Xu, Hongyu Zhang, Enze Jin, Zhiyong Tan, Peiwei Zhang, Yanbin Li, Dahai Zhang, Qingguo Fei
The extreme and repeated aerothermal environments working on reusable launch vehicles bring challenges for the design of hot structure. Due to the outstanding high-temperature resistant, SiC/SiC composite is an excellent candidate material for hot structures in re-entry vehicles. In this paper, the thermo-mechanical coupling failure mechanisms of SiC/SiC composite are investigated comprehensively.
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Experimental investigation and computational modelling of 304LN stainless steel under constant and variable strain path multiaxial loading conditions Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-31 Surya P. Rao, S. Sivaprasad, H.N. Bar, Partha Pratim Dey
This study investigates the fatigue behavior of 304LN stainless steel under constant and variable strain path multiaxial loading conditions. Experimental methods and computational modelling were used to analyze the response of the material to different loading scenarios. Experimental investigations were conducted to gather empirical data, which were subsequently validated using a modified Ohno-Wang
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Fretting fatigue life of galvanized bridge support cable wire: Experimental study and strain-based fracture mechanics analysis Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-24 Eduardo Martins Fontes do Rêgo, Ali Chehrazi, Antonio Carlos Oliveira Miranda, Scott Walbridge, Tim Topper
The galvanized wires used in cable bridges can fail due to fretting fatigue. Experimental results have shown that defects resulting from the galvanization process are a possible source of initiation for fatigue cracks and make the life shorter than that of a wire without a galvanized layer. The investigation presented in this paper uses strain-based fracture mechanics to analyze the influence of these
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On the measurement of total entropy generation for determining fatigue fracture Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-24 Mohammad A. Amooie, Peyton J. Wilson, Ali Mahmoudi, Elaheh Azizian-Farsani, Michael M. Khonsari
A novel approach to measuring the rate of plastic work during fatigue using a thermodynamic modeling framework is presented. The temperature profile and temperature gradient are utilized to measure the total accumulated entropy throughout the fatigue degradation process. It is shown that for cases in which temperature does not reach a steady state condition, such as very low-cycle fatigue (VLCF), or
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Phase-field modeling of crack growth under coupled creep-fatigue Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-23 Fei Xue, Tian-Le Cheng, Yinkai Lei, You-Hai Wen
Crack growth under coupled creep-fatigue strongly influences service life of metallic components operating at high temperatures. However, there lack numerical models that enable direct simulations of crack growth and plasticity development under coupled creep-fatigue. In this study, a unified phase-field model is developed for simulating crack growth under fatigue, creep, and coupled creep-fatigue
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Assessing the influence of image capture frequency and asynchronicity on the accuracy of digital image correlation for fatigue analysis Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-23 Vipin Chandra, Pritam Chakraborty
Efficiency of Digital Image Correlation (DIC) technique for fatigue analysis can be significantly increased by capturing images at periodic intervals for correlation. However, the scarcity of images to capture the history of deformation can cause inaccuracies in full-field measurements. In this study, a comprehensive analysis is conducted to quantitatively assess this error by considering various scenarios
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Uncertainty quantification in residual stress affected fatigue crack growth life Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-22 Dale L. Ball, Mark A. Ryan
In recent years a number of studies have been performed in which the impact of residual stress on structural performance, especially fatigue performance, has been evaluated both experimentally and analytically. These efforts are leading to an emerging paradigm in which residual stresses are represented explicitly in structural design, analysis, manufacturing and sustainment calculations. In order for
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Effect of welding residual stresses on the fatigue life assessment of welded connections Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-22 Le Wang, Xudong Qian, Liuyang Feng
Welding residual stresses impose significant influences on the fatigue behavior and structural integrity of welded connections in various engineering applications. Understanding the effects of these residual stresses on fatigue life is crucial for ensuring the reliability and safety of welded structures. This paper proposes a damage-incorporated thermal–mechanical simulation method to examine the effect
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Fatigue assessment of structural components through the Effective Critical Plane factor Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-22 A. Chiocca, F. Frendo
The integrity assessment of structural components under complex loading conditions relies on the evaluation of the fatigue damage typically arising from stress concentrations, such as geometric irregularities, notches, weld beads, grooves etc.. Various methodologies, including the Notch Stress Approach (NSA), the Theory of Critical Distances (TCD), the Strain Energy Density (SED), and the Critical
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Investigation of surface finish and fatigue life of laser Powder Bed fused Ti-6Al-4V Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-22 Kannan Pradeep Varsha, Swee-Hock Yeo, Hitoshi Soyama
In this fact-pacing world of technological advancement, the rise of additive manufacturing (AM) has found immense applications of metallic alloys such as Ti6Al4V to manufacture key components in automotive, aerospace and healthcare sectors. However, fatigue characteristics of such additively manufactured metal alloys is noticeably weak, and as such requires post-processing. In this study, AM Ti6Al4V
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Mechanisms of fatigue degradation process in axially loaded grouted connections under submerged conditions Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-21 Jakob Borgelt, Joshua Possekel, Peter Schaumann, Elyas Ghafoori
Grouted connections in offshore support structures bond overlapping steel tubes using ultra-high strength grout. These connections, used in jacket structures, face dynamic pulsating loads and submerged conditions. Current design guidelines offer simplified S-N curves that do not reflect realistic conditions for offshore wind turbines. This study introduces a new S-N curve for axially loaded grouted
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Fretting fatigue of 42CrMo4+QT steel: Experimental and numerical assessment Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-20 Martin Nesládek, Julian Marcell Enzveiler Marques, Jan Papuga, František Fojtík, Vladimír Mára, Karel Trojan, Karel Doubrava
This paper focuses on an experimental and numerical assessment of fretting fatigue in cyclically loaded specimens from 42CrMo4+QT steel in contact with bridge pads of the same material. Four different pad configurations were employed, varying the radii of the pad legs, to achieve various stress gradient conditions in the fatigue process zone. A qualitative change in terms of the number of contact initiation
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Multi-roller taper burnishing of internal chamfers and its enhancement mechanism on 7050 aluminum alloy Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-20 Mohammad Keymanesh, Hansong Ji, Xiangyu Zhang, Jianjian Wang, Pingfa Feng, Jianfu Zhang
The chamfer surface of the hole entrance is considered a source of crack initiation and propagation caused by surface non-uniformity, which undoubtedly has a significant effect on component performance. The present study proposes a multi-roller taper burnishing (MRTB) process that is able to improve the integrity of the chamfer surface and thereby enhance the fatigue performance of 7050-T7451 aluminum
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Relaxation of residual stress in welded plates during long life fatigue loading Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-19 C. Gales, A. Conle, J. Pineault
The presence of residual stress in welded components can have a significant impact on fatigue response. Residual stresses were assessed in thick welded A36 cantilever specimens (T-specimens) at the fatigue critical area. Testing involved subjecting the T-specimens to varying bending stresses and load cycles, leading to different levels of local plasticity at the weldtoe. Extensive X-ray diffraction
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Investigation on the fatigue crack growth behavior of welded joints in EH690 high-strength marine steel Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-19 Xinkang Shen, Xudong Gao, Yongbo Shao, Wentao He, Zhibing Yu
EH690 high-strength steel (HSS) is extensively utilized in marine engineering due to its exceptional strength. The fatigue crack growth (FCG) behaviors of EH690 HSS welded joints in different zones (base metal (BM), heat-affected zone (HAZ), and weld metal (WM)) were investigated by conducting FCG tests with various stress ratios (). The results demonstrate that the WM and HAZ materials exhibit enhanced
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Fatigue investigations of elastomers developed for high-pressure hydrogen gas environments Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-19 Jacopo Schieppati, Winoj Balasooriya, Philipp Arno Franz Huber, Gerald Pinter
Hydrogen possesses many characteristics to be an ideal candidate as a more sustainable energy carrier, especially for the transport sector. For a proper optimization of this abundant resource, hydrogen needs to be compressed, and stored in high-pressure conditions, which demands improvement in technology and the development of appropriate materials. In this context, elastomeric sealing components play
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A modified physics-informed neural network to fatigue life prediction of deck-rib double-side welded joints Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-18 Xincheng Li, Zhongqiu Fu, Jiakai Shu, Bohai Ji, Bangchong Ji
Deck-rib welded joint is an important part of orthotropic steel decks, which are susceptible to fatigue cracks under various load cycles. Therefore, it is essential to use efficient predicting methods to assess the fatigue performance of deck-rib welded joints with new geometry and form in order to ensure a reliable operation of the bridge. A modified physics-informed neural network (PINN) is proposed
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A comparative study of fatigue crack driving force considering in-plane constraint effect Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-17 Guangxu Chen, Yujie Xiang, Keke Tang
Nonlinear fracture mechanics parameters, ΔCTOD and Δ are implicitly used to characterize the crack driving force (CDF) in estimating Fatigue Crack Growth Rate (FCGR) in ductile material. However, in the presence of structure geometry effect, evaluation of effective CDF remains to be clarified. In this regard, a comparative study was conducted and the in-plane-constraint parameter was introduced to
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Multiple cracking, crack coalescence and fatigue lifetime – Model and experiments on an austenitic steel and on a nickel base alloy Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-17 Sophie Madeleine Schackert, Hermann Riedel, Christoph Schweizer
In many metals and alloys, low-cycle fatigue (LCF) and thermomechanical fatigue (TMF) generate a large number of surface microcracks. Using the replica technique, we document their growth and coalescence in the austenitic steel 1.4550 and the nickel base alloy Inconel 100. A model based on elastic–plastic fracture mechanics is developed, which considers the growth and coalescence of many coplanar semi-elliptical
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Corrigendum to “High-cycle fatigue behavior of Haynes 282 superalloy subjected to accelerated ageing” [Int. J. Fatigue 182 (2024) 108234] Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-16 Amey Parnaik, A.H.V. Pavan, S.S. Silchonok, N.G. Kislov, R.L. Narayan
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Low cycle fatigue behavior of MAR-M247 nickel-based superalloy from 500 to 900 °C: Analysis of cyclic response, microstructure evolution and failure mechanism Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-15 Meng Liu, Quanyi Wang, Yunqing Jiang, Tongfei Zou, Hao Wu, Zhenhuan Gao, Yubing Pei, Hong Zhang, Yongjie Liu, Qingyuan Wang
Low cycle fatigue behaviors of MAR-M 247 superalloy were investigated at 500 °C, 700 °C and 900 °C. The detailed deformation mechanisms were characterized by scanning electron microscopy (SEM), electron backscatter diffraction (EBSD) and transmission electron microscopy (TEM) and the critical resolved stress to active different deformation mechanisms were calculated. The results show that crack propagates
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Microstructure and fatigue crack growth behavior of heat-treated electron beam melted Ti-6Al-4V alloy Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-15 Anish Ranjan, Antonello Astarita, Stefania Franchitti, Amit Arora, Sushil Mishra, Amit Kumar Singh
The effect of post-deposition heat treatment on microstructure and fatigue crack growth has been analyzed for electron beam melted Ti-6Al-4V plates. Samples have been heat-treated at temperatures of 950 °C and 1050 °C, and subsequently cooled at different cooling rates in the furnace and the water. The as-built sample possesses columnar prior β grains filled with exceptionally fine α+β Widmanstätten
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A study of fatigue property enhancement of 1045 steel processed by surface mechanical rolling treatment with an emphasis on residual stress influence Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-14 Linye Zhang, Yuxuan Song, Xiaogui Wang, Shuiqing Zhou, Zhenyu Ding, Weiya Jin, Zengliang Gao, Yanyao Jiang
Several factors contribute to the observed bulk mechanical properties enhanced by surface mechanical rolling treatment (SMRT), and it is important to distinguish the influences of each major factor. A commonly used engineering carbon steel, 1045 steel, was chosen for the current study because the material does not have stress-induced phase transformation. A fully reversed strain-controlled gradual
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Isothermal and thermomechanical fatigue crack growth behavior and modelling of 316LN stainless steel with the superposition of HCF loading Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-13 Yiming Zheng, Bingbing Li, Fang Wang, Caijun Xu, Kang Wang, Xu Chen
This work comparatively investigates the effect of superposition of high-cycle fatigue (HCF) loading on the crack growth behavior of 316LN stainless steel in isothermal fatigue (IF) and thermomechanical fatigue (TMF) tests. Results show that a deflection of the crack growth rate is observed in the tests without HCF loading. The superposition of HCF loading leads to a marked increase of crack growth
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Phase field modeling of underloads induced fatigue crack acceleration Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-13 Hao Wang, Tong Shi, Qiyu Huang, Xiaoben Liu
This study proposes a novel methodology to model the fatigue crack growth acceleration under underloads using a phase field fracture framework. In this model, fatigue crack growth is characterized by the degradation of fracture toughness, with an emphasis on employing a representative loading strategy instead of explicit cyclic loading, thus accelerating simulations of high-cycle fatigue. The model
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Nonlocal multiaxial fatigue model based on artificial neural networks for predicting fretting fatigue life of dovetail joints Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-13 Wang Zhao, Sihai Luo, Xiaoqing Liang, Zhicong Pang, Jingdong Song, Zhenyang Cao, Fang Cheng, Weixin Fan, Weifeng He, Ronghui Cheng
Fretting fatigue of dovetail joints is of paramount importance for ensuring equipment safety, where the swift and precise estimation of their fatigue life is crucial. In this study, we present a nonlocal multiaxial fatigue model based on artificial neural networks (ANN) to tackle these challenges. Initially, the damage parameters were calculated using critical plane approaches (CPA) and theory of critical
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Dynamic characteristics of compacted landfill waste material from cyclic triaxial tests Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-12 Sangharsha Bhandari, Behzad Fatahi, Waranga Habaraduwa Peellage, Hadi Khabbaz, Haleh Rasekh, Jeff Hsi
This study conducted a series of cyclic and monotonic triaxial tests on reconstituted landfill waste material from a closed landfill site in Sydney, Australia, to assess its dynamic behaviour under various testing conditions. Specifically, the effects of cyclic deviatoric stress, loading frequency, and effective confining stress on the cumulative plastic axial strain, resilient modulus, and damping
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Effect of peening with fine iron-sulfide particles on the rotating bending fatigue properties of low alloy steel and formation of iron-sulfide layer Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-12 Shotaro Noguchi, Kiyotaka Mitake, Kosuke Doi, Hisashi Harada, Shoichi Kikuchi
Low alloy steels were subjected to peening with fine iron sulfide particles (FeS-peening) under ambient conditions to transfer a layer of such particles, which can improve seizure resistance and sliding properties, and thus enhance the fatigue characteristics of the steel. This process was performed without the use of aqueous NaSO and the specimens were assessed using electron probe microanalysis and
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Very high cycle fatigue characteristics of laser beam powder bed fused AlSi10Mg: A systematic evaluation of part geometry Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-12 Kamin Tahmasbi, Muztahid Muhammad, Maryam Avateffazeli, Mohammadreza Yaghoobi, Andrea Tridello, Davide S. Paolino, Shuai Shao, Nima Shamsaei, Meysam Haghshenas
This study explores the influence of geometry and part size on defect distribution, melt pool size, and mechanical characteristics in laser beam powder bed fused (LB-PBF) AlSi10Mg. Five distinct geometries—hourglass, small rod, small block, large block, and large rod—were fabricated under identical process parameters. Fully reversed ultrasonic fatigue testing, operating at a frequency of 20 kHz, was
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Evaluation of scale invariance in fatigue crack growth in metallic materials Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-10 V. Norman, M. Ahlqvist, T. Mattsson
The length-scale dependence of fatigue crack growth is evaluated for a set of metallic materials, namely titanium Ti-6Al-4V, ductile iron EN-GJS-500-7 and tool steel AISI H13, by performing fatigue crack growth tests on geometrically similar compact C(T) specimens of different sizes. With references to length-scale-invariant variables, notably the crack growth rate normalised by the specimen width
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Experimental investigation on the effect of forced assembly on fatigue behavior of single-lap, countersunk composite bolted joints Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-10 Hao Qu, Dongsheng Li, Yunong Zhai, Ende Ge, Wei Xi, Chenhao Ji
Forced assembly is a common countermeasure for eliminating the interface gap during composite airframe assembly, which modifies the bolt-hole bearing behavior and brings failure risks. In this study, an experimental investigation on the effect of forced assembly on the fatigue behavior of single-lap, countersunk composite bolted joints is presented. The hole elongation and dynamic stiffness are obtained
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Effects of yttrium on microstructure and low cycle fatigue properties of superalloy IN713C at high temperature Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-10 Qingling Li, Huarui Zhang, Ying Cheng, Yanyun Sun, Fuwei Wang, Zichen Zha, Junpin Lin, Hu Zhang
In order to improve the high temperature and low cycle fatigue performance of the IN713C alloy, trace amounts of yttrium (Y) element were added to such an alloy. The effect of Y on the microstructure and fatigue performance under push-pull loading condition of the IN713C alloy at 650 °C was investigated, and the fracture mechanisms of the IN713C alloy with different Y additions at strain amplitudes
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Effects of shot peening on improving high-temperature fretting fatigue performance of nickel-based single crystal superalloy tenon attachment Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-09 Lu Liu, Shouyi Sun, Huitao Chen, Tianyu Yuan, Jie Li, Yuxin Huo, Lei Li
In order to reveal the shot peening (SP) strengthening mechanism on the high-temperature fretting fatigue performance of nickel-based single crystal (NBSC) tenon attachment, fretting fatigue tests under three load conditions were carried out at 600 ℃. The results showed that the fretting fatigue life of SP NBSC tenon attachment could be increased to 357.53 % of that of non-SP NBSC tenon attachment
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Corrigendum to “Study on predicting rolling contact fatigue of pitch bearing raceway in offshore wind turbine” [Int. J. Fatigue 184 (2024) 108284] Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-03 Haifeng He, Yiming Chen, Xin Jin, Heli Liu, Chunmei Wang
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A semi-empirical life-prediction model for multiaxial ratchetting-fatigue interaction of SUS301L stainless steel tubular welded joint Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-03 Huiliang Luo, Chao Yu, Yujie Liu, Qianhua Kan, Guozheng Kang
Based on the strain measured in the SUS301L stainless steel tubular welded joint in the asymmetrically stress-controlled multiaxial low-cycle fatigue tests by using the digital image correlation (DIC) method, the dependence of fatigue life on the loading level and loading path is well explained by discussing the multiaxial ratchetting-fatigue interaction in the fatigue failure zone of welded joint
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Evaluation of the accuracy and efficiency of the modified maximum variance method for multiaxial fatigue analysis under constant amplitude loading Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-03 J.L.A. Ferreira, J.N. Dias, F.M. Lima, J.A. Araújo, C.R.M. da Silva
An optimized version of the Maximum Variance Method (MVM) is employed to determine maximum shear stress amplitudes in high-cycle multiaxial fatigue analysis using the critical plane approach, increasing accuracy and reducing computational burden. This refined approach posits that the MVM assumes that the critical plane is the one subjected to the maximum variance of the shear stress history. Comprehensive
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Microstructure evolution, crack initiation and early growth of high-strength martensitic steels subjected to fatigue loading Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-02 Shao-Shi Rui, Shaolou Wei, Chengqi Sun
Fatigue loading induced microstructure evolution featured by Fine Granular Area (FGA) in high-strength martensitic steels have close ties to the fatigue crack initiation and early growth, which are worthy of being investigated. On this issue, we conducted Very High Cycle Fatigue (VHCF), High Cycle Fatigue (HCF) and Low Cycle Fatigue (LCF) tests on three different types of specimens. Combined with post-mortem/quasi
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On the fatigue crack growth behavior of nanocrystalline CrMnFeCoNi Int. J. Fatigue (IF 5.7) Pub Date : 2024-07-31 Simon Pillmeier, Michael Burtscher, Guillaume Laplanche, Reinhard Pippan, Jürgen Eckert, Anton Hohenwarter
The fatigue crack growth (FCG) behavior of the equimolar CrMnFeCoNi Cantor-alloy in the nanocrystalline grain size regime has been explored with special focus on the influence of specimen orientation and the effect of additional heat-treatments. For the synthesis severe plastic deformation using high-pressure torsion (HPT) was used. The results were critically discussed regarding the impact of grain
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Fatigue study of twisted polyamide sub-rope for floating wind turbines: Fast evaluation with heat build-up protocol and tomography study of mechanisms Int. J. Fatigue (IF 5.7) Pub Date : 2024-07-30 Laure Civier, Yoan Chevillotte, Cédric Bain, Guilhem Bles, Guillaume Damblans, Peter Davies, Yann Marco
Polyamide 6 fibre ropes are of interest for floating offshore wind turbine mooring lines but their fatigue durability represents a key aspect to characterize and validate on the new constructions and coatings developed for this long term application. This paper presents a fatigue study on laboratory scale polyamide 6 sub-ropes which were wetted before testing. A T-N curve describing ranges of [2%,
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Dynamic recrystallization mechanisms for improving fatigue life under high temperature low cycle fatigue in FGH95 alloy Int. J. Fatigue (IF 5.7) Pub Date : 2024-07-30 Yanjie Li, Qianyang Sun, Peiwei Zhang, Fangzhou Lu, Dahai Zhang, Qingguo Fei
High temperature low cycle fatigue (LCF) tests were conducted on the FGH95 nickel-based superalloy at temperatures of 420 °C and 600 °C. The experimental results indicate that the fatigue life of the FGH95 alloy at 600 °C is approximately nine times higher than that at 420 °C under identical stress conditions. This finding differs from the conclusions of previous studies on the effect of temperature
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Prediction of fatigue life of laminated composites by integrating artificial neural network model and non-dominated sorting genetic algorithm Int. J. Fatigue (IF 5.7) Pub Date : 2024-07-30 A.H. Mirzaei, P. Haghi, M.M. Shokrieh
The present study introduces an artificial neural network (ANN) model coupled with the non-dominated sorting genetic algorithm (NSGA-II) to establish an advanced model for fatigue life prediction of laminated composites. The developed model was trained on a comprehensive collection of dependent experimental data of carbon/epoxy composites. This training encompassed 14 distinct cases, covering various
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Neural network integrated with symbolic regression for multiaxial fatigue life prediction Int. J. Fatigue (IF 5.7) Pub Date : 2024-07-29 Peng Zhang, Keke Tang, Anbin Wang, Hao Wu, Zheng Zhong
In the realm of structural engineering, accurately predicting multiaxial fatigue life presents a formidable challenge, stemming from the complex interplay of stress and strain across multiple directions. This research introduces the Symbolic Regression-Neural Network (SR-NN) framework, a novel integration of symbolic regression-derived expressions with neural networks aimed at enhancing predictive
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Predicting subsurface inclusion initiated butterfly-wing cracking under rolling contact fatigue Int. J. Fatigue (IF 5.7) Pub Date : 2024-07-28 R. Dai, H. Long
Wind turbine (WT) gearbox bearings experience premature failures. Damage characterisation of failed bearings has shown that subsurface micro cracks and butterfly-wing cracks are associated with non-metallic inclusions in the bearing raceways. The existing studies are unable to predict crack propagation under rolling contact fatigue considering shakedown and ratchetting when the material around an inclusion
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Effects of retained austenite and martensite microstructure on fatigue crack propagation in quenched and tempered high carbon steels Int. J. Fatigue (IF 5.7) Pub Date : 2024-07-28 Milan Agnani, Kip O. Findley, Steven W. Thompson
Commercial high-carbon 52,100 steel was subjected to varying quenching and tempering heat treatments to develop plate martensite and retained austenite (RA). The mode I fatigue crack growth (FCG) behavior of quenched and tempered microstructures with varying amount of RA and degree of martensite tempering was investigated. The interaction between the fatigue cracks and the surrounding microstructure
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In vitro corrosion-fatigue behaviour of rare-earth containing magnesium WE43 in sterile complex cell culture medium Int. J. Fatigue (IF 5.7) Pub Date : 2024-07-26 Julia Nachtsheim, Songyun Ma, Jaka Burja, Alexander Kopp, Jan-Marten Seitz, Bernd Markert
Rare-earth containing magnesium alloys are promising biomedical materials for a new generation of biodegradable orthopaedic implant systems due to their excellent biocompatibility, mechanical and biodegradation properties. However, chemo-mechanical interactions in aggressive physiological corrosion environments result in rapid degradation and early loss of mechanical integrity, limiting its broader
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Investigating the effect of stress ratio on fatigue crack growth rate behaviour in friction stir welded AA7075-T651 aluminium alloy plates Int. J. Fatigue (IF 5.7) Pub Date : 2024-07-26 Karthick Ganesan, T. Srinivasa Rao, S.R. Koteswara Rao
This study examines the characteristics of Fatigue Crack Growth Rate (FCGR) in AA 7075-T651 Friction Stir Welded (FSW) joints with a thickness of 16 mm. Compact tension (CT) specimens from both the base and the FSW joints were utilized to assess FCGR under various stress ratios (0.2 to 0.5). Additionally, the study involved analyzing the transverse tensile characteristics of both the based and the
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Effects of deep hole drilling processes on the fatigue strength of GTD-111 DS Int. J. Fatigue (IF 5.7) Pub Date : 2024-07-25 G. Macoretta, B.D. Monelli, M. Arcioni, M. Grilli
The paper deals with the effects of electrochemical and electro-discharge deep hole drilling on the high-temperature fatigue behavior of a directionally solidified GTD-111 superalloy. High-temperature HCF tests were carried out at 800 °C on specimens having a coaxial hole drilled with the investigated processes. The hole diameter and length were 1.5 and 95 mm, respectively. The material’s high-temperature
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The effect of grain size and anomalous shape on low cycle fatigue of nickel-based superalloy at elevated temperature Int. J. Fatigue (IF 5.7) Pub Date : 2024-07-25 Qiang Tian, He-Yong Qin, Jingjing He, Xuefei Guan
The effect of grain size and shape on low cycle fatigue of a nickel-based superalloy at elevated temperature was investigated. Fatigue testing was performed using GH4742 specimens having fine, coarse, and irregular grains. The fine-grained material exhibits a transition strain separating the fatigue life diagram into two regimes with distinct slopes while the other two do not. A piecewise log-linear
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Experimental study on the effect of reaming on the fatigue life of split-sleeve cold-expanded Ti–6Al–4V alloy components Int. J. Fatigue (IF 5.7) Pub Date : 2024-07-24 Zhangchi Dang, Yehao Peng, Rongjuan Yang, Li Yan, Xuedong Gan, Dongyun Ge
The split-sleeve cold expansion technique has been widely used in the aerospace industry to improve the fatigue life of metal components with holes. Due to the morphology change after the expansion, a reaming process is necessary to improve the machining accuracy of the hole surface. This final reaming process might change the residual stress distribution around the hole significantly but the effect