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New insights into the load sequence effect: Experimental characterization and incremental modeling of plain high-strength concrete under mode II fatigue loading with variable amplitude Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-17 Henrik Becks, Martin Classen
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Enhanced cyclic stress response and low-cycle fatigue life of modified 9Cr-1Mo steel by wire-arc additive manufacturing and post-heat treatment Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-16 Shouwen Shi, Xiaomei Liu, Gaoyuan Xie, Xu Chen
Wire-arc additive manufacturing (WAAM) is a promising technique to fabricate large-size components with high efficiency. However, the changes in microstructure induced by WAAM and its impact on the fatigue behavior remain unclear. In this study, the microstructure and low-cycle fatigue mechanisms of modified 9Cr-1Mo ferritic/martensitic steel fabricated by WAAM at 350 °C are investigated, and different
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Study of fatigue crack propagation on modified CT specimens under variable amplitude loadings using machine learning Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-15 B. Santos, V. Infante, T. Barros, R. Baptista
This study focuses on predicting fatigue crack paths and fatigue life in modified compact tension specimens, under mixed mode and variable amplitude loading conditions, using Machine Learning techniques. Mixed-mode conditions were induced by using specimens that incorporated holes with different radii and center coordinates. Initially, multiple Finite Element Method (FEM) simulations were conducted
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Evolving fatigue damage detection based on multi-component nonlinear modulation mechanism of tuned laser-generated Rayleigh waves Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-11 Qichao Cheng, Jun He, Shixi Yang, Xin Xiong, Zhaoyu Liang, Yongshui Luo
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An innovative way to measure fatigue crack growth without COD gauge Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-10 Bong-Sang Lee, Jung-Min Kim, Joon-Yeop Kwon, Jong-Min Kim, Min-Chul Kim
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A two-point fatigue strength assessment for surface-hardened notched components under consideration of residual stresses based on the local strain approach Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-09 Patrick Yadegari, Heinz Thomas Beier, Michael Vormwald
The “Guideline non-linear” of the German Research Association for Mechanical Engineering provides a fatigue strength assessment for machine components based on the local strain approach. Currently, this assessment is limited to homogeneous components and without the possibility to consider residual stresses. The methods are thus inadequate for surface-hardened components, where the presence of material
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A non-ordinary state-based peridynamic model for creep–fatigue behavior and damage evolution Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-09 Han Dong, Han Wang, Weizhe Wang, Yingzheng Liu
A peridynamic creep–fatigue model is proposed to study creep–fatigue mechanical responses and damage behaviors. A non-unified constitutive model is reformulated in a nonlocal form in the peridynamic-based framework. A probabilistic peridynamic damage criterion is proposed for characterizing creep–fatigue damage. The simulated mechanical responses are in good agreement with the results of creep–fatigue
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Fractional cyclic cohesive zone model for time-dependent fatigue behavior of soft adhesives under mode-II loading Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-09 Zhuoran Yang, Yan Xia, Chengbin Yao, Zhongmeng Zhu, Zhanli Liu, Han Jiang, Kaijie Wang
Soft adhesives exhibit nonlinear viscoelastic behavior during cyclic loading, suggesting that their cycle-dependent fatigue behavior can be significantly affected by the time-dependent deformation behavior. Soft adhesives are frequently subject to various cyclic conditions in practical applications, presenting potential safety risks. This paper has proposed a fractional cyclic cohesive zone model (CZM)
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Influence of corrosion fatigue on the stress gradient effect of the aluminium alloy EN AW-6082 T6 Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-09 Markus Schönowitz, Bernd Maier, Florian Grün
This study investigates the influence of corrosion fatigue on the fatigue strength of the aluminium alloy EN AW-6082 T6 with regard to the stress gradient. The experimental design involves varying loading conditions and specimen geometries to facilitate testing under three distinct stress gradients: tension/compression (0mm), rotary bending (0.2mm), notched rotary bending (5.3mm). Reference constant
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Characterization and application of maximum entropy fatigue damage model based on digital image correlation and inverse analysis Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-08 Xing Chen, Xiaozhe Ju, Hongshi Ruan, Qingpeng Shan, Yijian Wang, Yangjian Xu, Junjun Chen, Lihua Liang, Shaojun Xie
In this study, a progress damage model that integrates the Maximum Entropy Fracture Model (MEFM) with the A-F kinematic hardening model is proposed to characterize the low-cycle fatigue damage behavior of metals. The MEFM establishes a correlation between the damage value and cumulative dissipation at the integration point through a damage accumulation parameter. Concurrently, the constitutive relationship
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A new progressive fatigue damage model for the three-dimensional braided composites subjected to locally-variable-amplitude loading Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-06 Jingran Ge, Zengfei Liu, Xinyu Hu, Xiaodong Liu, Bingyao Li, Chunwang He, Jun Liang
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AI-based macro model learning for high cycle fatigue assessment of welded joints in large-span steel structures Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-04 Yongtao Bai, Cheng Xie, Xuhong Zhou
Welded spherical joints are critical components in large-span bridges and spatial steel structures prone to high cycle fatigue (HCF) loadings. Challenges exist for assessing fatigue life of this joints in small data from physical experiments and no detailed fatigue classification in design codes. This paper investigates the fatigue resistance of welded spherical joints and the real-time pre-damage
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High-throughput experimental method for measuring fatigue crack growth rate curve of soft materials Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-04 Jianxing Liu, Yihong Du, Yifan Zhou, Hou Wu, Tongqing Lu
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Key role of surface defects in the multiaxial fatigue life of additively manufactured unmachined 18Ni300 maraging steel Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-04 Aleksander Karolczuk, Andrzej Kurek, Mariusz Prażmowski, Krzysztof Żak, Dariusz Skibicki, Łukasz Pejkowski, Piotr Skubisz, Małgorzata Witkowska
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Fatigue of wire arc additively manufactured components made of unalloyed S355 steel Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-03 Burak Karabulut, Xiongfeng Ruan, Scott MacDonald, Jelena Dobrić, Barbara Rossi
Today, wire arc additive manufacturing (WAAM) can be used to fabricate critical structural steel components. The process allows to fabricate sophisticated shapes, thereby achieving very high levels of material capacity utilization. Key welding parameters inevitably influence the mechanical resistance of components made by WAAM, submitted to static or cyclic loading. In this research, the fatigue behaviour
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Tension-tension fatigue behavior of basalt composite hybrid joints Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-03 Lulu Liu, Xin Wang, Zhishen Wu, Thomas Keller
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The effect of κ-carbides on high cycle fatigue behavior of a Fe-Mn-Al-C lightweight steel Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-02 A. Gomez, A. Banis, M. Avella, J.M. Molina-Aldareguia, R.H. Petrov, A. Dutta, I. Sabirov
Numerous studies have demonstrated the viability of lightweight Fe-Mn-Al-C steels for exhibiting an improved balance of high strength and high ductility in automotive applications. However, their high-cycle fatigue behaviour has been scarcely studied. This work examines the effect of κ-carbides formed during the aging treatment on the high-cycle fatigue performance of an austenitic Fe-29Mn-8.7Al-1C
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An innovative approach to planar mixed-mode fatigue crack growth study Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-02 Rathin Maity, Akhilendra Singh, Surajit Kumar Paul
Determining fatigue crack growth parameters under mixed-mode loading is crucial for damage tolerance design, particularly in assessing a component's residual life with defects to prevent disasters. This study introduces a novel methodology for determining fatigue crack growth rate. A digital microscope is utilized to track the fatigue crack tip with respect to local coordinate systems established on
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Unified SIF at different stress ratios and the physical insight on the exponent of the Paris law Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-02 Lichao Yuan, Yujie Wei
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A damage model for matrix cracks in composite laminates under fatigue loading based on continuum damage mechanics Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-01 Wenxuan Qi, Jie Huang, Weixing Yao, Haojie Shen
A damage model for transverse matrix cracks in composite laminates under fatigue loading was presented in this paper. The model was prosed based on the theory of continuum damage mechanics (CDM) at macro level and could capture the ‘edge effect’ of matrix cracks in composite laminate under fatigue loading. To obtain the constitutive equation of UD lamina containing transverse matrix cracks, a polynomial
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Multiaxial fatigue life prediction based on effective factor with shear/axial stress ratio for Ti60 titanium alloy in very high cycle regime Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-30 Chao-Lin Chen, De-Guang Shang, Na-Min Xiao, Xing-Wu Li, Ai-Xue Sha, Jing Li, Jing-Xuan Li, Zhi-Qiang Tang, Zhao-Yun Han
Fatigue failure mechanism of Ti60 titanium alloy under tension–torsion multiaxial loading in the very high cycle regime was studied first, and the results showed that the shear/axial stress ratio directly affects the failure mechanism. When the shear/axial stress ratio is relatively small, cracks tend to originate from the subsurface in single-point initiation mode, and the larger the shear/axial stress
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Cyclic deformation and microstructural evolution of 316L stainless steel with pre-charged hydrogen Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-30 Zhenghong Fu, Lvfeng Jiang, Yunlai Sun, Junjun Jin, Chao Yu, Mingjiu Zhao, Qianhua Kan, Guozheng Kang
This study investigates the cyclic plastic deformation and microstructural evolution of hydrogen-charged 316L stainless steel. The results of low-cycle fatigue tests indicate that the samples with and without pre-charged hydrogen exhibit initial cyclic hardening and sequential cyclic softening at a low strain amplitude (≤0.5 %). However, a secondary cyclic hardening at a high strain amplitude (≥0.7 %)
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Investigation of high-cycle fatigue property and fatigue crack propagation behavior of a die-forged 2014 aluminum alloy aircraft wheel Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-29 Zhengjun Shen, Yuchang Su, Jichang Deng, Zhirong Huang
The high-cycle fatigue (HCF) property and fatigue crack propagation (FCP) behavior of aircraft wheels manufactured by die forging were investigated from two sampling directions (rims and discs). The results indicate that the HCF anisotropy of the rim and disc specimens increases with decreasing stress amplitude, and the fatigue strengths are 181 MPa and 157 MPa, respectively. Based on the quantitative
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Complex-inclusion induced fracture mechanism of ultraclean 100Cr6 bearing steel under high cycle fatigue test Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-29 Zheng Wang, Feng Chen, Qing Yin, Bin Hu, Haiwen Luo
Fatigue property of an ultraclean 100Cr6 bearing steel was investigated by the high-cycle rotating bending fatigue tests. It was found that the cyclic loading below 1197 MPa led to the frequent cracking initiated from the complex inclusions with the two distinctly different features: the breaking and the debonding of complex inclusions, all of them have a core of oxide agglomerate containing many cavities
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Fatigue behavior of copper thin films Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-27 Chung-Youb Kim
In this study, to investigate the mean stress effect on fatigue life of a 12 μm thick copper thin film, fatigue tests were performed at four maximum stress levels for a wide range of stress ratios. Tensile and creep tests were also performed to obtain the reference mechanical properties of the copper thin film tested. The fatigue behavior of copper thin films depended on the regions of the stress ratio
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A fatigue life model accounting for the combined effect of surface roughness and microstructure: Application to SLM fabricated Hastelloy-X Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-27 Chandrashekhar M. Pilgar, Ana M. Fernandez, Javier Segurado
This study introduces a microstructure-sensitive fatigue life prediction framework based on CP-FFT which includes the effect of surface roughness. The model is applied to flat Hastelloy-X specimens fabricated using Selective Laser Melting. The surface roughness measured is incorporated introducing a free surface with sinusoidal profile. The framework can accurately predict the fatigue life reduction
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Assessment of cyclic deformation behaviour of wire arc additively manufactured carbon steel Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-27 Mariela Mendez-Morales, Ricardo Branco, Trayana Tankova, Carlos Rebelo
Wire Arc Additive Manufacturing (WAAM) has gained popularity due to its speed and cost-effectiveness. However, the current knowledge on the cyclic deformation behaviour of WAAM materials is limited. To address this issue, this study investigates the cyclic deformation behaviour of WAAM ER70S-6 carbon steel. Coupons were extracted from printed walls with horizontal and vertical orientations and from
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Effects of temperature gradients on thermomechanical fatigue of nickel-based superalloy Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-26 Jiawei Xu, Jiaqi Lu, Huang Yuan
Temperature-gradient-mechanical fatigue (TGMF) is a significant concern in internal cooling turbine blades. In the present study, the through-thickness temperature gradient was determined by the inverse heat conduction method and investigated in TGMF. Using the continuum damage mechanics, the environmental impact was identified as the primary contributor to the in-phase TGMF damage. A damage accumulation
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An efficient/accurate multi-scale fatigue prediction method for Metal-Polymer hybrid (MPH) interface Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-26 Wenfeng Pan, Lingyu Sun, Chunjie Guo, Xudong Yang, Jiaxing Sun, Yiben Zhang, Zhengqing Yang
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Artificial neural networks-based J-integral prediction for cracked bodies under elasto-plastic deformation state –cyclic loading Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-26 S.N.S. Mortazavi, A. Ince
The study builds upon a prior modeling framework designed for monotonic loading to compute the cyclic J-integral encompassing a crack tip experiencing elastic–plastic deformation due to cyclic loads. The proposed modeling approach extends the authors' earlier time-efficient method for computing the J-integral by combining artificial neural networks (ANNs) with finite element (FE) analyses. The ANN-FE
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Bonded and prestressed fatigue crack retarders based on Fe-SMA Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-26 Wandong Wang, Xinlu Guo, Wei Zhou, Yu’e Ma, Masoud Motavalli, Elyas Ghafoori
A bonded and prestressed retarder concept is proposed in this work. The shape memory effect of an iron-based shape memory alloy (Fe-SMA) has been exploited to realize a desirable self-prestressing mechanism, resulting in compressive stresses in the parent structure. The synergistic prestressing and added fail-safe features of bonded and prestressed Fe-SMA retarders desirably restrain the fatigue crack
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Enhancing plain fatigue strength in aluminum alloys through shot peening: Experimental investigations and a strain energy density interpretation Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-24 M. Benedetti, M. Pedranz, V. Fontanari, C. Menapace, M. Bandini
This study addresses the complex interplay of shot peening-induced effects on the fatigue strength of high-strength aluminum alloys. The inherent poor fatigue properties of aluminum alloys, particularly exacerbated in components manufactured through additive processes, pose significant challenges. Shot peening, a recognized surface treatment, proves effective in enhancing fatigue resistance through
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Three-dimensional representative modelling for fretting wear and fatigue of submarine power cable conductors Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-23 C. Poon, S. Uí Mhurchadha, R.A. Barrett, S.B. Leen
Submarine power cables (SPCs) for floating offshore wind turbines (FOWT) have received relatively little attention compared to the structural design of wind turbines. This is particularly true for the assessment of fretting-related damage in multi-strand copper wire conductors, due to the complexity of the contact interactions and potentially severe dynamic loading. In this paper, a three-dimensional
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Effect of thickness on fatigue behavior of L-PBF fabricated Ti-6Al-4V alloy using a novel specimen geometry Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-23 Krista Dyer, Reza Molaei
One of the most promising advantages with additive manufacturing is the ability to fabricate complex geometries. These geometries can have significant impacts on thermal histories, microstructures, defects, and fatigue behavior. This study aims to investigate the effects of thickness variation on the fatigue life of AM fabricated components subjected to uniaxial loading through the introduction of
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Study on the behavior of small cracks in PA38-T6 (6060-T6) aluminum alloy under multiaxial fatigue loadings Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-22 Jan Seyda, Łukasz Pejkowski, Mateusz Chorobiński
This study investigated the effects of multiaxial cyclic loading on the initiation and propagation of fatigue cracks in an industrial-grade aluminum alloy. Four different loading cases, including 90° out-of-phase and asynchronous loading, were used under the control of strain. The study used cellulose acetate film replication and SEM fractography techniques to increase the understanding of the evolution
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A fatigue life prediction approach for porosity defect-induced failures in directed energy deposited Ti-6Al-4V considering crack growth environment Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-22 Dingcheng Tang, Xiaofan He, Bin Wu, Linwei Dang, Hao Xin, Yuhai Li
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A novel fatigue life prediction methodology based on energy dissipation in viscoelastic materials, synergistic effects of stress level, stress ratio, and temperature Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-21 A. Vahid Movahedi-Rad, Lulu Liu, Thomas Keller
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A comprehensive study of a long-term creep thermo-mechanical fatigue behavior monitoring of BFRP composite pipeline using electrical capacitance sensors and deep learning algorithm Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-20 Wael A. Altabey
The composite pipeline is a relatively new and viable alternative pipeline to the more commonly used traditional one due to its good mechanical and fatigue properties and lower production cost. For this purpose, it is critical to assess the mechanical and fatigue performance of composite pipeline material under various working conditions, particularly for monitoring long-term creep thermo-mechanical
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High cycle fatigue behavior of additively manufactured Ti-6Al-4V alloy with HIP treatment at elevated temperatures Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-19 Gen Li, Weiqian Chi, Wenjing Wang, Xiaorui Liu, Huan Tu, Xu Long
The fatigue tests at 200 °C and 400 °C were conducted to investigate the elevated-temperature fatigue behavior of additively manufactured (AM) Ti-6Al-4V alloy with hot isostatic pressing (HIP) treatment. Since the manufacturing defects (i.e., pores) were significantly reduced by HIP treatment, no specimen failed from the pores. Consequently, the present AM Ti-6Al-4V alloy behaved superior to that without
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Corrigendum to “Fatigue life improvement using low transformation temperature weld material with measurement of residual stress” [Int. J. Fatigue 164 (2022) 107137] Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-19 Jordan Franks, Greg Wheatley, Pedram Zamani, Reza Masoudi Nejad, Wojciech Macek, Ricardo Branco
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Fatigue and fracture behaviour of (Al-Cu-Li) AA2198 under different ageing conditions Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-17 Alexis T. Kermanidis, Christina-Margarita Charalampidou, Ioannis Goulas, Panagiotis Skarvelis, Nikolaos D. Alexopoulos
The effect of artificial ageing on tensile and fatigue properties along with resistance to fracture of aluminium alloy 2198-T3 was investigated. The fatigue and damage tolerance capability of the alloy was studied under different artificial ageing conditions, simulating the natural ageing process which takes place during an aircraft lifespan. Four (4) different ageing conditions corresponding to under-aged
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Defect tolerance and fatigue limit prediction for laser powder bed fusion Ti6Al4V Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-17 Abdul Khadar Syed, Wilson Vesga, Ben Dutton, Tom Berentshaw, Xiang Zhang
This study is focused on the individual effect of gas porosity size and location on fatigue strength of a laser powder bed fusion Ti6Al4V alloy. Tensile and fatigue samples were manufactured by artificially seeding gas pores either at the centre or close to surface. Seeded porosity reduced the ductility by 20% and fatigue strength by 33% but had little influence on the static strength. Despite seeded
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Neural network based fatigue lifetime prediction of metals subjected to block loading Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-16 Jelle Plets, Quinten Bouckaert, Bilal Ahmed, Wim De Waele, Kris Hectors
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Study on predicting rolling contact fatigue of pitch bearing raceway in offshore wind turbine Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-15 Haifeng He, Yiming Chen, Xin Jin, Heli Liu, Chunmei Wang
Pitch bearing is the critical component that are widely used to ensure the operation of offshore wind turbine blades and enable efficient capture of wind energy. Uncertain environmental factors and extreme load conditions can induce early fatigue failure in pitch bearings, and lead to major accidents such as blade detachment. In this study, a damage coupling fatigue simulation model, considering residual
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Very high cycle fatigue of laser powder bed fused Al-Cu-Mg-Ag-TiB2 (A20X) Alloy: Stress relief and aging treatments Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-15 Maryam Avateffazeli, Shawkat I. Shakil, Alireza Behvar, Moataz M. Attallah, Jutima Simsiriwong, Andrea Tridello, Davide S. Paolino, Meysam Haghshenas
This study presents a comprehensive exploration of the fatigue response in the very high cycle fatigue (VHCF) regime for an additively manufactured (i.e., laser powder bed fused) A20X aluminum alloy. Although the need for high-performance materials with exceptional fatigue qualities has increased dramatically, the VHCF behavior of Al-Cu-Mg-Ag-TiB (A20X) structures remains largely unknown. A series
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Rapid fatigue evaluation of additive manufactured specimens: Application to stainless steel AISI 316L obtained by laser metal powder bed fusion Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-14 M. Bemani, S. Parareda, D. Casellas, A. Mateo, R. Das, A. Molotnikov
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Microstructural influences on simultaneous strength and fatigue crack resistance in advanced high-strength steels Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-14 Nader Heshmati, Mohammad Hoseini-Athar, Annika Borgenstam, Henrik Sieurin, Joachim Larsson, Peter Hedström
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Probabilistic notch fatigue assessment under size effect using micromechanics-based critical distance theory Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-14 Jin-Chao He, Shun-Peng Zhu, Changqi Luo, Wei Li, Qiang Liu, Yun He, Qingyuan Wang
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Static-dynamic damage mechanism and self-heating effect of a clean elastic polyurethane grouting material for trenchless rehabilitation under high stresses Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-13 Cuixia Wang, Zengni Qin, Xinghui Gong, Chao Zhang, Wang Pan, Yangyang Xia, Peng Zhao, Lei Wang, Jian Liang, Zhenyuan Hang, Weiliang Gao
Compared with traditional excavation rehabilitation, trenchless grouting rehabilitation technology has the advantages of fast, precise, and low-carbon, which has a broad application prospect in wind turbine foundation rehabilitation. In this work, a non-toxic, environment-friendly, fast-setting, high-strength, and high-toughness elastic polyurethane (PU) grouting material was proposed, and the static-dynamic
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Mixed mode fatigue crack growth and fatigue threshold analysis in polyurethane adhesives at elevated temperatures Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-12 M. Ribas, A. Akhavan-Safar, R.J.C. Carbas, E.A.S. Marques, S. Wenig, L.F.M. da Silva
The paper investigates mixed-mode fatigue crack growth in ductile polyurethane adhesives, emphasizing mode decoupling to distinguish the impact of each loading mode component on crack propagation. It also explores the temperature sensitivity of fatigue crack growth rates for each loading mode. Individual scrutiny of the role of each loading mode in tests is accompanied by an analysis of fatigue fracture
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Study on thermal fatigue stability in microstructure and mechanical property of Fe35Ni35Cr20Mn10 high-entropy alloy wire and pearlite wire at high/medium temperature environment Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-11 Mengchuan Shi, Xinghui Pan, Dan Wu, Hengcheng Liao, Guangjing Li, Hongfang Liu, Weijun Zhu
Thermal fatigue stability in microstructure and strength of Fe35Ni35Cr20Mn10 high-entropy alloy (HEA) wire and pearlite wire at 400–700 °C with low cycles was studied. The pearlite wire has a poor stability in microstructure and strength, significantly changing with the temperature. HEA wire has an excellent thermal fatigue stability. After the thermal fatigue at 400 °C and 500 °C, the microstructure
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Practical fatigue strength diagrams for compression springs based on the FKM-Guideline “Analytic Strength Assessment for Springs“ Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-11 Martin Petrich, Ulf Kletzin
Metal springs are used extensively in technical products. The mathematical relationships and Goodman diagrams contained in the DIN EN 13906–1 standard form the essential basis for the design and calculation of cylindrical helical compression springs. They are used not only nationally, but internationally in the spring industry and by spring users. However, the diagrams are more than 50 years old and
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Improving the fatigue property of 316L stainless steel through direct energy deposition technology Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-11 Kang Xu, Sen Huang, Mingxiong Yu, Yu Xia, Bochuan Li, Lizhong Mao, Hongsheng Tian, Zhongwei Xu, Geping Xiong, Lipeng Xiao, Wenping Wang
In this study, to improve the fatigue strength of coarse grain 316L stainless steel, the hard 17-4ph martensitic stainless steel was deposited on the surface of hot rolled 316L based on direct energy deposition (DED) additive manufacturing technology. The 17-4ph deposition and 316L substrate are well connected without any cracking phenomenon which lays the foundation of good mechanical properties.
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Fatigue prediction criteria for rubber antivibration design with temperature effects Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-09 Robert Keqi Luo
It is desirable to obtain a fatigue criterion that can be correlated to different rubbers with both mechanical and temperature effects. In this paper, we investigated the possibility to correlate the S-N base function to temperature environments. The published experimental data consisting of temperatures ranging from 23-90 ° C for rubber samples with 50 and 45 Shore hardness were used to validate the
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Low-cycle fatigue behaviour of magnesium alloy thick plate joints fabricated via differential double-shoulder friction stir welding Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-09 Qiang Liu, Wen Wang, Ting Zhang, Qianzhi Ma, Peng Han, Dingrui Ni, Ke Qiao, Kuaishe Wang
Magnesium (Mg) alloy thick plates welded by friction stir welding (FSW) often exhibit poor formability and uneven microstructures, leading to a significant deterioration in the mechanical properties. In this work, AZ31 Mg alloy plates with a thickness of 20 mm were successfully welded by differential double-shoulder friction stir welding (DDS-FSW). The low-cycle fatigue response behaviour was characterised
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Modelling short crack growth under creep-fatigue interaction for different dwell times Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-08 Chengchong Hu, Lianyong Xu, Lei Zhao, Yongdian Han, Cong Li
The creep-fatigue interaction (CFI) short crack growth behavior of 316H steel under different dwell times at 550℃ was investigated in this work. The dwell time effect of the CFI short crack growth behavior is analyzed systematically, the results revealed that compared to the long cracks, the short cracks is more sensitive to the creep damage effect during the dwell period. Meanwhile, a CTOD-based CFI
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Multiaxial low cycle fatigue behavior and life prediction of wire arc additive manufactured 308L stainless steel Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-08 Yajing Li, Shuyao Zhang, Wanqi Yu, Bo Li, Fuzhen Xuan, Xu Chen
Wire arc additive manufacturing (WAAM) is a technique that has gained popularity in various industrial sectors due to its high productivity and flexibility. However, the comprehension of cyclic deformation and fatigue behaviors in WAAM austenitic stainless steel (SS), particularly under complex multiaxial loading conditions, is much less advanced compared to conventional manufacturing methods. This
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Mechanism of mean stress sensitivity in Ti-6Al-4V under different stress ratios in high cycle fatigue Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-07 Weiqian Chi, Wenjing Wang, Zeyuan Hou, Min Zhang
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An automated measurement method for the fatigue crack propagation based on decorrelated digital image correlation Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-07 Derui Li, Bin Cheng, Linze Shi, Sheng Xiang, Qibin Zhao
Measurements of fatigue crack propagation are crucial for fatigue tests. Nowadays, fatigue tests still necessitate experimenters to manually observe and document the propagation of fatigue cracks, a process that proves to be extremely time-consuming and labor-intensive. This study introduces a novel approach to fatigue crack measurement by employing the decorrelated digital image correlation (DIC)
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A new probabilistic control volume scheme to interpret specimen size effect on fatigue life of additively manufactured titanium alloys Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-07 Zhi-Qiang Tao, Zibiao Wang, Xiangnan Pan, Tianxiong Su, Xu Long, Bowen Liu, Qingxiao Tang, Xuechong Ren, Chengqi Sun, Guian Qian, Youshi Hong
The effect of specimen size on the fatigue performance of additively manufactured (AMed) Ti-6Al-4V is investigated in this paper. The fatigue tests of Ti-6Al-4V specimens made by laser powder bed fusion were conducted via ultrasonic axial cycling up to very-high-cycle regime with stress ratio = –1. The - data of five group specimens show an evident size effect, that is, with the increase of specimen