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VHCF behavior and defect tolerance of modified bainitic 100Cr6 with a high retained austenite content Int. J. Fatigue (IF 6.0) Pub Date : 2024-05-09 P. Ostermayer, B. Blinn, U. Krupp, T. Beck
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Propagation rate transients in J-controlled fatigue characterization of adhesives Int. J. Fatigue (IF 6.0) Pub Date : 2024-05-08 Carlos G. Dávila, Shawn Weeks, Michael Czabaj
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An approach to estimate the low cycle fatigue probabilistic curves of PBF-LB/M 316L steel from small size datasets using the remora optimization algorithm Int. J. Fatigue (IF 6.0) Pub Date : 2024-05-07 Yefeng Chen, Xiaowei Wang, Zhen Zhang, Dewen Zhou, Yong Jiang, Jian Weng, Frank Walther, Jianming Gong
The significant dispersion in fatigue properties is a prevalent attribute observed in metals manufactured by the Additive Manufacturing (AM). To ascertain the safety of components subjected to low cycle fatigue (LCF) loadings at a temperature of 550 °C, it is necessary to carry out a fatigue reliability assessment of AM metals. Nevertheless, the number of LCF life tests is limited owing to time-consuming
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Impact fatigue behavior of laser metal deposition 316L stainless steel with an automated impact fatigue system based on split Hopkinson bar technique Int. J. Fatigue (IF 6.0) Pub Date : 2024-05-07 Boli Li, Sihan Zhao, Jianjun Wang, Penghui Li, Yuanmeng Liu, Ruifeng Wang, Kangbo Yuan, Meng Gao, Weiguo Guo, Chunhuan Guo, Fengchun Jiang
Repeated impact subjecting on the key components of equipment is always characterized by extremely high loading rate loading, while plastic deformation of most metals depends on loading rate. To ensure the reliability and security of these components, it is necessary to understand the loading rate effect on the fatigue performance. In this study, an automated impact fatigue system based on split Hopkinson
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Fatigue failure analysis of U75V rail material under Ⅰ+Ⅱ mixed-mode loading: Characterization using peridynamics and experimental verification Int. J. Fatigue (IF 6.0) Pub Date : 2024-05-04 Xiaochuan Ma, Weibin Yin, Yajie Wang, Linya Liu, Xianghe Wang, Yao Qian
Fatigue failure behavior of U75V rail material under Ⅰ+Ⅱ mixed-mode loading is analyzed and characterized in this work. A fatigue crack propagation experiment was carried out on U75V rail material under mixed-mode loading for = 0.1. Then, based on the Ordinary State-Based Peridynamic (OSB PD) theory, bond strain rate and bond energy release rate methods were used to characterize the fatigue failure
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High fatigue performance and microscopic mechanisms of in-situ TiB2/7050Al composite at different temperatures Int. J. Fatigue (IF 6.0) Pub Date : 2024-05-04 Liufang Ma, Xian Luo, Hong Wang, Rui Hu, Xiaowei Yi, Chaoxian Zhou, Wei Chen, Gang Ran
In this work, the fatigue properties of in-situ TiB particle-reinforced 7050 Al-matrix (TiB/7050Al) composites at room temperature (RM), 100 ℃ and 150 ℃ were studied, respectively, and the microstructure changes, fatigue fracture characteristics and fracture mechanism were analyzed. The results indicate that when the fatigue temperature increased, the amount of S phase precipitation along grain boundaries
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Detection of early fatigue damage during ultrasonic fatigue testing of steel by acoustic emission monitoring Int. J. Fatigue (IF 6.0) Pub Date : 2024-05-03 M. Seleznev, A. Weidner, H. Biermann
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Stress ratio influence on Paris parameter and fatigue driving force pertinent to material properties Int. J. Fatigue (IF 6.0) Pub Date : 2024-05-01 Chunguo Zhang, Panpan Wu, Shengyong Mu, Yuanzhe Dong
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Microstructure evolution and crack initiation behavior of Q450NQR1 high-strength weathering steel in very high cycle fatigue regime Int. J. Fatigue (IF 6.0) Pub Date : 2024-05-01 Wentao Huang, Haotian Peng, Yongjie Liu, Yao Chen, Yiru Wu, Fulin Liu, Tao Cong, Qingyuan Wang
The fatigue behavior of Q450NQR1 high-strength weathering steel under a loading ratio of = 0.1 was experimentally investigated in the very high cycle fatigue (VHCF) regime, elucidating the formation mechanism of the fine granular area (FGA). The results indicated that Q450NQR1 high-strength weathering steel mainly fails due to non-inclusion-induced crack initiation (NIICI) in VHCF regime. Slip in {110}
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Fatigue analysis and heat treatment comparison of additively manufactured specimens from AlSi10Mg alloy Int. J. Fatigue (IF 6.0) Pub Date : 2024-05-01 Martin Matušů, Ludmila Džuberová, Jan Papuga, Jakub Rosenthal, Jan Šimota, Libor Beránek
This research delves into the analysis of various properties of additively manufactured specimens from AlSi10Mg with an as-printed surface, comparing the effects of three distinct heat treatments with an untreated variant. The study assesses both static properties and fatigue responses for each heat treatment, including a detailed examination of the microstructures. In the high-cycle fatigue region
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Investigating post-processing impact on fatigue performance of LPBF Ti6Al4V with heat treatment, high pressure heat treatment, and dry electropolishing strategies Int. J. Fatigue (IF 6.0) Pub Date : 2024-05-01 Omar Bologna, Silvia Cecchel, Giovanna Cornacchia, Andrea Avanzini, Raffaele Sepe, Filippo Berto, Nima Razavi
This study investigates the impact of post-processing techniques on the fatigue behaviour of specimens in Ti6Al4V made by laser powder bed fusion (LPBF) for relevant applications, such as motorsport. Despite the LPBF advantages in terms of complex design and weight reduction, challenges such as reduced fatigue performance persist. Therefore, the application of post-processing treatments can play a
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Automatic crack tip localization in enormous DIC images to in-situ characterize high-temperature fatigue crack growth behavior Int. J. Fatigue (IF 6.0) Pub Date : 2024-05-01 Chen Zhang, Mengqi Lei, Yuanxin Chen, Bin Kuang, Shijie Liu, Yanhuai Ding, Qihong Fang, Xiaotian Li, Wei He, Huimin Xie
Digital Image Correlation (DIC), with its advantages of full-field, non-contact and applicability to extreme environments, is a powerful deformation measurement technique to in-situ monitor the high-temperature fatigue crack propagation behavior. For the DIC-based fracture mechanics analyses of cracking, crack tip position in DIC images, which is usually determined visually and manually, plays a significant
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High-cycle and very-high-cycle fatigue of an additively manufactured aluminium alloy under axial cycling at ultrasonic and conventional frequencies Int. J. Fatigue (IF 6.0) Pub Date : 2024-05-01 Xiangnan Pan, Youshi Hong
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Microstructural effects on the rotating bending fatigue behavior of Ti–6Al–4V produced via laser powder bed fusion with novel heat treatments Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-30 Nicholas Derimow, Jake T. Benzing, David Newton, Chad Beamer, Ping Lu, Frank W. DelRio, Newell Moser, Orion L. Kafka, Ryan Fishel, Lucas Koepke, Chris Hadley, Nik Hrabe
The rotating bending fatigue (RBF) behavior (fully reversed, R = −1) of additively manufactured (AM) Ti–6Al–4V alloy produced via laser powder bed fusion (PBF-L) was investigated with respect to different microstructures achieved through novel heat treatments. The investigation herein seeks to elucidate the effect of microstructure by controlling variables that can affect fatigue behavior in Ti–6Al–4V
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Special Issue: Engineering against fatigue failure Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-29 Emeritus Spiros Pantelakis, Michael Vormwald
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Experimental and numerical study on high-cycle fatigue performance of austenitic stainless steel with pre-charged hydrogen Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-28 W.X. Li, S.W. Zhao, P.F. He, B.J. Wang
High-cycle fatigue performance is one of the crucial issues for hydrogen diaphragm compressors, as hydrogen embrittlement affects the components in a high pressure hydrogen environment. In this study, the high-cycle fatigue response of MP7, a novel material of austenitic stainless steel designed for hydrogen diaphragm compressors, is investigated by tests and by numerical ways using the Crystal Plasticity
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Effect of non-proportional stress states caused by varying phase shifts on the fatigue life of welded joints Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-27 N.B. Winther, M.A. Jensen, J.H. Andreasen, J. Schjødt-Thomsen, M.L. Larsen
In this paper, the effect of multiaxial non-proportional stress states on the fatigue life of welded joints is investigated. The non-proportional stress states are caused by various phase shifts between the normal and shear stresses. In total 45, welded tube-to-tube specimens are tested under multiaxial proportional and non-proportional loading. The increase in fatigue damage caused by non-proportional
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Fatigue properties and damage evolution of CFRP/Al bolted joint under high load level using micro-CT technology Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-27 Lanxin Jiang, Long Yang, Bing Yang, Zhen Liao, Shoune Xiao, Hongzi Xiong
Although bolted jointsbetween aluminum alloy (Al) and carbon fiber reinforced plastic (CFRP) are often used in engineering, the specific cause of fatigue failure in these joints is still not understood. The tension–tension fatigue experiments were performed on CFRP/AL bolted single lap joints (SLJs) at high load levels in this investigation. Two stacking sequences ([±45] and [0/90, ±45]), were developed
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Influence of deep rolling at different temperatures on near-surface and mechanical properties of a Maraging C250 steel Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-27 T. Wegener, T. Oevermann, T. Niendorf
Due to an outstanding combination of high strength and fracture toughness Maraging steels are used in numerous industries, e.g., in the aerospace sector. The high strength can be attributed to precipitation strengthening by conventional age-hardening heat treatments. However, as many of the envisaged applications will suffer from cyclic loadings, the fatigue properties are of significant interest in
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Investigation on high cycle fatigue performance of additively manufactured Alloys: Synergistic effects of surface finishing and Post-Heat treatment Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-27 Yunhao Zhao, Mitra Shabani, Liyi Wang, Wei Xiong
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Damage healing mechanisms in polycrystalline copper under unconstraint ultrasonic vibration treatment Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-27 Yi-Er Guo, De-Guang Shang, Long Xue, Xiang Yin, Chao-Lin Chen, Dao-Hang Li
The fatigue performance and microstructure of polycrystalline copper treated by one (UUV1), two (UUV2), three (UUV3) passes of unconstraint ultrasonic vibration (UUV) treatment were investigated in this paper. The surface roughness, fatigue life, microstructure, and plastic strain energy before and after UUV treatment were compared. The results revealed that the surface integrity of the sample for
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Effect of natural aging by multifunction cavitation on plane bending fatigue behaviour of heat-treatable Al-Si7Mg aluminum alloys and its fatigue strength estimation Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-25 Shoichi Kikuchi, Shunta Matsuoka, Toshihiko Yoshimura, Masataka Ijiri
The effect of natural aging by multifunction cavitation (MFC) on the fatigue behaviour of heat-treatable Al-Si7Mg aluminum alloys was examined. Surface observation and plane bending fatigue tests were conducted for the MFC-treated aluminum alloys at a stress ratio, , of −1. The hardness of aluminum alloy without T6 treatment was significantly increased by MFC due to both the work hardening and natural
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Deterioration effect of creep on fatigue properties in QCr0.8 alloy: Damage mechanism and fatigue-creep life evaluation Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-24 Hang Meng, Anbiao Zhong, Peiyan Wang, Kangbo Yuan, Yan Zeng, Ping Zhang, Yang Li, Tao Zhang
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Nonlocal fretting fatigue assessment for dovetail joints Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-22 Kaiwen Guo, Huang Yuan
In fretting fatigue, the local stress concept leads to a significant underestimation of fatigue life. Conventional fatigue models lack conservatism in dovetail structures due to mesh dependency and cumulative plastic deformations. The present study aims to develop a nonlocal life model for fretting fatigue of dovetail joints based on extensive experimental and computational analyses. Frictional work
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Surface fatigue crack propagation behavior of CFRP-steel plates with improved J-integral driving model Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-21 Qianziyang Zhou, Xinyan Guo, Yi Yang, Xin Zhou, Ketai Xu
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The effects of submerged laser peening, cavitation peening, and shot peening on the improvement of the torsional fatigue strength of powder bed fused Ti6Al4V produced through laser sintering Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-20 Hitoshi Soyama, Kwan Lok Wong, Daniel Eakins, Alexander M. Korsunsky
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Thermal fatigue behaviors of thin-walled structures with holes: Experiments and phase field fracture modeling Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-20 Chenyu Du, Haitao Cui, Hongjian Zhang
The assessment of thermal fatigue behaviors of thin-walled structures with holes is a challenging task. A novel experimental approach was designed to test the thermal fatigue behaviors of thin-walled structures with holes. The experiments were conducted under three test conditions (300–850/950/1000 ℃) to investigate the behaviors of crack initiation and early propagation. The cyclic temperature loading
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Understanding the influence of environmental conditions on the low cycle fatigue behaviour of high strength low alloy (HSLA) steel under air and corrosive (3.5% NaCl) conditions Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-18 Karthick Ganesan, Suresh Kumar Sundaram
Offshore structures which are made up of high-strength low alloy (HSLA) steel experience fatigue load due to sea waves and corrosion. In the present work, the influence of environmental conditions (air and 3.5 % NaCl solution) on the strain-controlled fatigue life of High Strength Low Alloy (HSLA) steel has been determined. Low cycle fatigue experiments were conducted on HSLA steel specimens of 12 mm
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Optimising fatigue crack growth predictions for small cracks under variable amplitude loading Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-18 B. Dixon, H. Fayek, C. Hodgen, T. Wiley, S. Barter
The fatigue cracks in a fighter aircraft that pose the greatest threat to structural integrity and availability are usually less than 1 mm for most of their lives. However, it has long been recognised that small cracks can grow significantly faster than long cracks at the same stress intensity range (). This means predictions for small cracks growing under realistic spectrum loading can be significantly
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Gradient residual stress and fatigue life prediction of induction hardened carbon steel S38C axles: Experiment and simulation Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-18 Tianyu Qin, Feifei Hu, Pingguang Xu, Han Zhang, Liang Zhou, Ni Ao, Yuhua Su, Takahisa Shobu, Shengchuan Wu
Gradient distribution of triaxial residual stresses to a depth of several millimeters is retained in middle carbon steel S38C axles after high-frequency induction hardening, which has become a critical concern for fatigue structural integrity. To address this, the axial, hoop, and radial gradient residual strains inside the axles were measured for the first time by advanced neutron diffraction. The
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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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Application of local fatigue strength approach to assess and optimise the impact of deep rolling on the fatigue performance of railway axles Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-15 T. Pertoll, C. Buzzi, M. Leitner, L. Boronkai
Deep rolling is a frequently used post-treatment process to increase the service life of railway axles. Through the process application, the surface roughness is reduced, the surface is work-hardened and compressive residual stresses are introduced in the near surface region in a controlled manner. These three effects have a positive impact on service life, and in the investigated case of railway axles
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Fatigue characteristics and energy evolution analysis of red sandstone under the coupling of freeze–thaw and cyclic loading Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-15 Jing Li, Jiangteng Li, Zhanming Shi, Mengxiang Wang, Han Tan
In order to improve the safety of rock mass engineering in cold regions, this paper discusses the fatigue characteristics and energy evolution of red sandstone under the coupling of freeze–thaw and cyclic loading. Firstly, the correlation between the fatigue life, failure stress, and the number of freeze–thaw cycles of the red sandstone samples was calculated using the Pearson correlation coefficient
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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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Cyclic flexural fatigue of porous Ti6Al4V constructs for use in mandibular reconstruction Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-11 Khaled M. Hijazi, Haojie Mao, David W. Holdsworth, S. Jeffrey Dixon, Amin S. Rizkalla
Porous Ti6Al4V constructs have been developed to replace mandibular bone, however the flexural fatigue properties of these constructs must first be assessed. In this study, porous constructs were built by selective laser melting (SLM) and subjected to cyclic flexural loading using a three-point bending setup and a servo-hydraulic Instron machine. Maximum flexural stress was plotted against the number
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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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Refill friction stir spot welding tool plunge depth effects on shear, peel, and fatigue properties of Alclad coated AA7075 aluminum joints Int. J. Fatigue (IF 6.0) Pub Date : 2024-04-10 Andrzej Kubit, Koen Faes, Hamed Aghajani Derazkola
This study investigates the impact of refill friction stir spot welding (RFSSW) on Alclad-coated AA7075 aluminum alloy, specifically exploring the effects of two plunge depths (g = 1.55 mm and g = 1.9 mm) on the mechanical and fatigue properties. The influence of the Alclad layer on the final joint properties is assessed. Internal flow analysis reveals a concentration of the Alclad layer at the corners
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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