Article
Engineering, Mechanical
Wenjie Zhang, Yanying Hu, Xianfeng Ma, Guian Qian, Jiamei Zhang, Zhengmao Yang, Filippo Berto
Summary: The high-cycle and very-high-cycle fatigue behaviors of AlSi10Mg alloy produced by additive manufacturing were studied, using a CPFEM model to simulate cyclic plastic deformation. The models used for predicting fatigue life showed good agreement with experimental results, with CPFEM simulation indicating that cyclic plastic strain is significantly increased near a pore compared to an inclusion. Residual stress near an inclusion led to large plastic strain localization, which is detrimental to fatigue performance.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Materials Science, Multidisciplinary
Jingyu Sun, Guian Qian, Jianghua Li, Ruiyang Li, Zhimo Jian, Youshi Hong, Filippo Berto
Summary: Currently, there is no systematic approach to simulate the microstructure sensitive crack initiation and propagation process in very-high-cycle fatigue. In this study, a computational framework combining crystal plasticity and cohesive zone model is developed to simulate the defect-induced short crack growth in an additively manufactured AlSi10Mg alloy. The framework can control the crack growth rate and the proportion of crack initiation damage in the total damage. An acceleration strategy is proposed to improve the computational efficiency for very-high-cycle fatigue. Experimental observations and simulation results show good agreement.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Engineering, Mechanical
Litton Bhandari, Vidit Gaur
Summary: This study investigates the cyclic behavior and cold dwell sensitivity of additively manufactured Ti6Al4V alloy. Low cycle fatigue tests were conducted on specimens exposed to a dwell period, revealing a significant reduction in fatigue lives at lower strain amplitudes but similar lives at higher ones. Fractographic analysis identified multiple crack initiation regions, attributed to process-induced defects or facet formation in α laths. The study discusses the failure mechanism based on stress redistribution and relaxation.
ENGINEERING FAILURE ANALYSIS
(2023)
Article
Engineering, Manufacturing
Saikumar R. Yeratapally, Christapher G. Lang, Albert R. Cerrone, Glen L. Niebur, Karl Cronberger
Summary: The influence of process parameters on the mechanical behavior of Ti-6Al-4V alloy produced via laser powder bed fusion is investigated. The study demonstrates the importance of pore clustering and grain orientation on fatigue performance.
ADDITIVE MANUFACTURING
(2022)
Article
Materials Science, Multidisciplinary
Robert K. Rhein, Qianying Shi, Srinivasan Arjun Tekalur, J. Wayne Jones, Jason W. Carroll
Summary: The study focused on the high cycle fatigue behavior of an additively manufactured aluminum alloy, AlSi10Mg-T6, specifically examining the impact of process-related defects on fatigue life, initiation, and small crack propagation behavior. Ultrasonic fatigue methods were used to determine effective fatigue strength for lifetimes in the range of 10^8-10^9 cycles. X-ray CT imaging was utilized to detect crack initiation and growth during fatigue cycling, revealing slow crack growth rates and transgranular, non-crystallographic behavior in small cracks originating from surface defects.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Engineering, Mechanical
Xavier Lesperance, Paul Ilie, Ayhan Ince
Summary: This study investigates the long fatigue life characteristics of AlSi10Mg and AlSi7Mg aluminium alloys produced using direct metal laser sintering. The results of fatigue tests suggest that the effects of heat treatment on high cycle fatigue and very high cycle fatigue performance of additive manufacturing alloys should be further explored in the context of microstructural changes.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2021)
Article
Engineering, Manufacturing
Litton Bhandari, Vidit Gaur
Summary: Additively manufactured Ti6Al4V alloys have high strength but suffer from poor ductility and inherent defects. This study investigates the influence of defects on mechanical and fatigue properties of the alloy and optimizes them through heat treatment.
ADDITIVE MANUFACTURING
(2022)
Review
Materials Science, Multidisciplinary
A. Raja, Srinivasa Rakesh Cheethirala, Pallavi Gupta, Nilesh J. Vasa, R. Jayaganthan
Summary: This article reviews the interrelationship between LPBF process parameters, microstructure, crack initiation, and crack growth mechanisms under fatigue loading conditions. It highlights the importance of standardizing mechanical testing techniques, specimen design guidelines, and post-manufacturing treatments for improving the fatigue resistance of AlSi10Mg alloy. The influence of microstructural features and post-processing conditions on fatigue properties is discussed, along with the crack growth mechanism observed in LPBF processed material.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Mechanical
Waqas Muhammad, Jidong Kang, Kaan Inal
Summary: The fatigue behavior of AlSi10Mg alloy processed by laser-based powder bed fusion of metals (PBF-LB/M) in different conditions is evaluated. A new surface treatment method is applied to improve the fatigue strength of the alloy. A simplified fracture mechanics-based fatigue life modeling approach is developed using real-time defects distribution data and surface profilometry measurements.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Aerospace
Zhi Bian, Xiaojia Wang, Zhe Zhang, Chao Song, Tongzhou Gao, Weiping Hu, Linlin Sun, Xiao Chen
Summary: This study investigates the high-cycle fatigue behavior of AM AlSi10Mg, taking into account the influences of powder size and fatigue damage, and presents a novel ML-based approach for life prediction.
Article
Nanoscience & Nanotechnology
Sumit Choudhary, Aditya Pandey, Vidit Gaur
Summary: The effect of different microstructural phases on mechanical and fatigue properties of additively manufactured Inconel 718 alloy was investigated in three different material conditions: as-built, as-built-machined, and as-built-heat-treated. The as-built samples showed a continuous structure of columnar and cellular dendrites of laves phases due to microsegregation. Machining reduced surface roughness and improved tensile and fatigue strength. Heat treatment resulted in dissolution of melt pool boundaries, breakdown of dendritic structure, and improved mechanical and fatigue properties. Four types of fatigue damage mechanisms were observed. The changes in properties were correlated with microstructural changes.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
F. Bathaee, A. Zarei-Hanzaki, A. Moshiri, H. R. Abedi
Summary: This study investigates the cyclic deformation behavior of AlSi10Mg alloy fabricated through selective laser melting. The directly aged microstructure exhibited the best fatigue performance with an outstanding balance between fatigue life and strength level. The low aspect ratio of the melt pools intensified the Marangoni effect, leading to crack initiation and the formation of balling defects.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Nanoscience & Nanotechnology
C. Paoletti, E. Santecchia, M. Cabibbo, E. Cerri, S. Spigarelli
Summary: AlSiMg alloys produced by additive manufacturing exhibit a complex microstructure, and a physically-based set of constitutive equations can predict their mechanical properties. Analysis of experimental data shows excellent correlation between model curves and experimental results.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2021)
Article
Nanoscience & Nanotechnology
Alexander Schmiedel, Christina Burkhardt, Sebastian M. Rudolph, Anja Weidner, Horst Biermann
Summary: The fatigue lives of Ti-48Al-2Cr-2Nb alloy were investigated in both additive manufacturing and conventional casting process. The additive manufactured material showed superior fatigue strength due to its smaller grain size.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Engineering, Mechanical
F. Sausto, S. Romano, L. Patriarca, S. Miccoli, S. Beretta
Summary: The metal additive manufacturing (AM) technology offers the possibility of obtaining optimized components with reduced weight in the space and aero-nautic industries. However, this manufacturing technique often leads to internal defects, poor surface quality, and process-induced residual stresses, which greatly affect the fatigue performance and reproducibility of AMed parts. A probabilistic finite element post-processor called ProFACE was developed to assess the fatigue strength and critical locations of complex components with process-induced defects. It has been successfully used to predict the fatigue life of AlSi10Mg components and explore the variability of significant parameters affecting the fatigue strength.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Mechanics
Ni Ao, Han Zhang, Huihui Xu, Shengchuan Wu, Dong Liu, Pingguang Xu, Yuhua Su, Qianhua Kan, Guozheng Kang
Summary: This study investigated the fatigue crack growth (FCG) behavior of a structurally gradient axle steel with different pre-crack depths in air and a corrosive medium. The results showed that corrosion significantly accelerated the FCG rate in the high Delta K region, but the effect weakened as Delta K decreased. The accelerated corrosion FCG rate was influenced by anodic dissolution, hydrogen-enhanced localized plasticity and corrosion-induced crack-tip blunting. Despite the decreasing corrosion resistance with increasing pre-crack depth, the FCG rate in the corrosive medium gradually decreased due to the dominant role of fatigue loading in accelerating corrosion FCG rate.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Engineering, Mechanical
Tao Shi, Jingyu Sun, Jianghua Li, Guian Qian, Youshi Hong
Summary: Using machine learning models and data interpolation, the influence of defect features on the fatigue performance of selective laser melted AlSi10Mg alloys was investigated. The results showed that increasing defect distance, circularity, and layer thickness improved fatigue life, while increasing stress amplitude, stress ratio, and defect size decreased fatigue life.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Mechanical
Ni Ao, Daoxin Liu, Xiaohua Zhang, Shengchuan Wu
Summary: Surface plastic deformation methods are widely used to improve the fretting fatigue property of titanium alloys. In this study, the influence of surface plastic deformation severity on the fretting fatigue behavior of Ti-6Al-4V alloy was investigated. The experimental results showed that both high and low levels of surface plastic deformation severity improved the fretting fatigue properties of the alloy, but their effects on microstructure and residual stresses were different.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Mechanical
Kaijuan Chen, How Wei Benjamin Teo, Yuanyuan Tian, Shengchuan Wu, Guozheng Kang, Kun Zhou, Jun Zeng, Hejun Du
Summary: The study investigates the effects of build direction on the tensile properties, tension-tension low cycle fatigue behavior, and failure mechanism of polyamide 12 parts fabricated by Multi Jet Fusion. The roles of formed voids, sintering interfaces, and geometrical imperfections are addressed. Results show that the Young's modulus is higher for bulk material with vertical build direction due to the enhanced sintering interfaces. The tensile strength of the printed bulk material with horizontal and vertical build directions is comparable. The fatigue behavior is influenced by the distribution of internal voids, sintering interfaces, and geometrical imperfections.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Mechanical
Feifei Hu, Shengchuan Wu, Xin Xin, Feng Guo, Zunsong Ren
Summary: High-speed railway axles are subject to complex variable amplitude (VA) loads during operation, but design codes and maintenance practices are mainly based on equivalent constant amplitude (CA) loads. This paper introduces a time-domain stepwise fatigue assessment (TSFA) approach to incorporate the influence of VA loads on accumulated damage and fatigue crack propagation. The results show that the safe lifetime of the axles under time-domain loading is considerably longer than the design value, indicating safe operation until retirement. However, for an original crack with a morphology ratio of 0.6 propagating to 45.0 mm, the lifetime of the axles is significantly reduced.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Mechanical
Ziyi Wang, Shengchuan Wu, Yu Lei, Hang Li, Chao Yu, Kun Zhou, Xiqiao Feng, Guozheng Kang
Summary: This paper presents a novel mesoscopic damage model to characterize the low-cycle fatigue damage evolution of an extruded AZ31 magnesium alloy, taking into account the effect of twinning. The damage caused by the slip bands-twin boundaries and slip bands-grain boundaries interactions is treated based on the Tanaka-Mura model and the Eshelby inclusion theory. The proposed damage model is able to reproduce the damage evolution processes and predict the crack initiation life within the twice error band.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Materials Science, Multidisciplinary
Jingyu Sun, Guian Qian, Jianghua Li, Ruiyang Li, Zhimo Jian, Youshi Hong, Filippo Berto
Summary: Currently, there is no systematic approach to simulate the microstructure sensitive crack initiation and propagation process in very-high-cycle fatigue. In this study, a computational framework combining crystal plasticity and cohesive zone model is developed to simulate the defect-induced short crack growth in an additively manufactured AlSi10Mg alloy. The framework can control the crack growth rate and the proportion of crack initiation damage in the total damage. An acceleration strategy is proposed to improve the computational efficiency for very-high-cycle fatigue. Experimental observations and simulation results show good agreement.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Hang Li, Jiwang Zhang, Shengchuan Wu, Ni Ao, Kaixin Su, Honglan Xie
Summary: This study reports on the micro-defects and growth mechanism of the plasma electrolytic oxidation (PEO) coating formed on 6082-T6 aluminum alloy. Various characterization techniques were used to analyze the morphology, phase, microstructure, and porosity of the PEO coating. The results revealed a porous outer layer, a dense inner layer, and the presence of different phases within the coating. The high-resolution X-ray computed tomography technique successfully characterized micro-defects within the coating and revealed a porosity fraction of 5.43%.
MATERIALS CHARACTERIZATION
(2023)
Article
Engineering, Mechanical
Zhengkai Wu, Ziang He, Shengchuan Wu, Xi Gao, Liming Lei, Changkui Liu, Bingqing Chen, Chengli Dong
Summary: In response to the insufficient understanding of the rotating bending fatigue (RBF) mechanism for additively manufactured components, a test rig using synchrotron radiation X-ray microtomography (SR-μCT) was developed to identify the failure behavior of Ti-6Al-4V alloys. The in situ RBF tests proved to be reliable in revealing the fatigue mechanism, but the initiation of fatigue short cracks was found to be from microstructural features of outer surfaces instead of internal defects. The study highlights the need to consider both internal and surface microstructural defects when studying additively manufactured alloys.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Mechanical
Songjiang Lu, Ni Ao, Qianhua Kan, Shengchuan Wu, Guozheng Kang, Xu Zhang
Summary: A three-dimensional discrete dislocation dynamics (DDD) method was used to study the effect of residual stress on the stress-strain response of gradient nano-grained (GNG) metals. The distribution of residual stress was found to have a significant influence on the tensile stress-strain curve. The presence of both compressive and tensile residual stress in GNG samples resulted in a lower initial flow stress but a higher ultimate flow stress compared to samples without residual stress.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Zhao Shen, Xiaoqin Zeng, Shengchuan Wu, Hongbing Yu, Benjamin M. Jenkins, Phani Karamched, Michael P. Moody, Jianqiang Zhang, You Wang, Sergio Lozano-Perez
Summary: This study reveals that the internal oxide precipitates in Fe-9Cr ferritic steel and Fe-17Cr-9Ni austenitic steel exposed to 600°C deaerated steam for 600 hours have needle-like and near-spherical morphology. The morphology of these precipitates is controlled by the interface structure between the metal matrix and the internal oxide, which is influenced by the crystallographic structure and orientation relationship of the two phases. The results suggest the potential to manipulate the distribution, morphology, and interface structure of internal oxide precipitates for better high-temperature oxidation resistance.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Yuliang Zhao, Dongfu Song, Shengchuan Wu, Shunfu Xie, Haoliang Wang, Mengmeng Wang, Weiwen Zhang, Zhenzhong Sun, Yubin Ke, Shanfeng Wang, Wanxia Huang, Ricardo Fernandez
Summary: A multiscale methodology was used to investigate the effect of Fe-rich phases and precipitates on the mechanical behavior of an Al-Cu-Mn-Fe-Sc-Zr alloy. It was found that the size of a-Al grains can be reduced by applied pressure, and suitable heat treatments can improve the mechanical properties of the alloy. The evolution of the size and morphology of fine precipitates with aging temperature and time was revealed, and the high ductility of the alloy was attributed to the complex shape and loss of interconnectivity of the Fe-rich particles due to heat treatment.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Yuexun Liu, Weijian Qian, Long Wang, Yanling Xue, Chuantao Hou, Shengchuan Wu
Summary: To investigate the damage mechanism of NEPE propellant, an in situ tensile testing rig with high-resolution synchrotron X-ray tomography was developed to characterize the internal microstructure and damage evolution. The mechanical behavior of the propellant was analyzed using dynamic mechanical analysis and numerical simulation. A cohesive-zone model was employed to visualize the debonding process at the filler/matrix interface and characterize the damage evolution. These findings contribute to understanding the cohesive behavior of NEPE propellant at a micro-scale and its macroscopic mechanical response.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Zhi-Qiang Tao, Guian Qian, Xiang Li, Jingyu Sun, Zi-Ling Zhang, Dao-Hang Li
Summary: This article proposes an innovative approach for determining the critical plane with weight-averaged largest fatigue damage, considering the failure modes of materials. Depending on the shear cracking behavior or tensile failure behavior of the material, an appropriate critical plane model is selected, and a multiaxial fatigue lifetime estimation methodology is established. Validation results using six materials demonstrate that the proposed methodology accurately estimates the orientation angles of failure planes and provides satisfactory fatigue lifetime estimations for both shear and tensile failure mode materials. Furthermore, the critical plane framework can be extended to stress-based fatigue criteria, and prediction results are in good agreement with experimental data for two additional materials.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Review
Materials Science, Multidisciplinary
Weijian Qian, Shengchuan Wu, Liming Lei, Qiaodan Hu, Changkui Liu
Summary: This article reviews the recent progress in material damage mechanism using various in situ testing rigs compatible with laboratory and synchrotron radiation X-ray facilities. Taking metallic alloys and composites as examples, the unique advantages of in situ X-ray three-dimensional tomography in revealing complex failure mechanisms, quantifying crack growth driving forces and crack closure phenomena, and elucidating the strengthening/degrading effects from microstructure and environment on structural material degradation are demonstrated. The ongoing direction of in situ multi-scale visualization and characterization is also discussed.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2024)
Article
Engineering, Mechanical
Miloslav Kepka, Miloslav Kepka Jr, Radovan Minich
Summary: This paper focuses on the fatigue life evaluation of the bodywork of a new articulated electric (battery) bus. The findings resulted in recommendations to improve the operational reliability of a particular vehicle and provided challenges for future research.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
T. Dusautoir, B. Berthel, S. Fouvry, P. Matzen, K-D. Meck
Summary: This study investigates the impact of post-processing treatments on the fatigue limit of additive manufactured Ti-6Al-4V under stress gradients, with a focus on surface integrity.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Zhuofan Xia, Di Wu, Xiaochen Zhang, Jianqiu Wang, En -Hou Han
Summary: The study reveals the surface-initiated rolling contact fatigue (RCF) failure mechanism under heavy load and initial high roughness surface. The results indicate that precursor of collapsed morphology and nanocrystalline layer are the main factors causing lower RCF life with high roughness compared to low roughness surfaces. The spalling failure initiating from low roughness surface under heavy load is strongly dependent on surface plastic deformation.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Daniel Gren, Knut Andreas Meyer
Summary: Rolling contact loading can cause plastic deformation and fatigue cracks. Current rail standards do not consider the effect of plasticity on mechanical behavior. This study proposes a new method for evaluating the fatigue life of deformed material and finds that superimposed compressive axial loads can increase fatigue life.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
R. Kumar, S. Sanyal, J. Bhagyaraj, E. Hari Krishna, S. Mukherjee, K. Prasad, S. Mandal
Summary: This study investigates the thermomechanical fatigue (TMF) behavior of Timetal 834 alloy under different loading conditions. The results show that the alloy exhibits different cyclic hardening and softening responses at different strain amplitudes. The strain amplitude and phase angle have significant effects on the TMF life.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Kai Donnerbauer, Tobias Bill, Peter Starke, Ruth Acosta, Bharath Yerrapa, Christian Boller, Klaus Heckmann, Frank Walther
Summary: Given the aging of nuclear power plants, it is important to develop methods for evaluating the integrity of components and structures in nuclear engineering. Suitable nondestructive testing methods can detect material degradation and determine its fatigue life. This study utilized various NDT parameters and scanning electron microscopic methods to explore the relationship between microstructure evolution and NDT data.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Liuyong He, Jiang Zheng, Tianjiao Li, Houkun Zhou, Lihong Xia, Bin Jiang
Summary: This study quantitatively analyzed the effects of precipitates on the deformation mode, cracking mode, and mechanical behavior of WE54 magnesium alloy during low-cycle fatigue. It was found that precipitates promoted the activation of dislocation slip and suppressed the activation of twinning, affecting the cracking mode and mechanical behavior.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Xiangkang Zeng, Conghui Zhang, Wenguang Zhu, Mingliang Zhu, Tongguang Zhai, Xiaomei He, Kangkai Song, Zhuohang Xie
Summary: The cyclic deformation behaviors and damage mechanisms of pure Zr were investigated. The cyclic stress response was mainly influenced by substructure evolutions. Prismatic < a > dislocation slip was identified as the dominant deformation mechanism. Fatigue damage was not only influenced by the initial texture, but also other factors.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Jingyu Yang, Bingbing Li, Yiming Zheng, Gang Chen, Xu Chen
Summary: Heat treatment is used to improve the low-cycle fatigue performance of additive manufactured 316LN stainless steel. The heat-treated material demonstrates initially cyclic hardening followed by softening behavior, and shows a stronger resistance to crack propagation compared to the as-built material, resulting in a longer fatigue life.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Lang Zou, Dongfang Zeng, Xiong Chen, Jun Li, Hai Zhao, Liantao Lu
Summary: This study investigates the competitive relationship between fretting fatigue and plain fatigue in press-fitted railway axles. By changing the depth of the stress relief groove, the plain fatigue limit and fretting fatigue strength were tested. Detailed information was gathered, and an evaluation methodology integrating finite element simulation and the Modified Wohler Curve Method was established. The study concludes that the optimal groove depth, which balances the anti-fatigue capabilities, depends on the number of test cycles.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Davide Leonetti, Koji Kinoshita, Yukina Takai, Alain Nussbaumer
Summary: This paper investigates the fatigue behavior of non-load-carrying transverse welded steel attachments, including fatigue crack monitoring and fracture surface analysis under constant and variable amplitude loading. A procedure is proposed to obtain a Markov transition matrix based on the measured strain signal and to randomly resample the stress history for variable amplitude fatigue tests.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Zhe Zhang, Bing Yang, Yuedong Wang, Shoune Xiao
Summary: This paper presents a method for designing fatigue life prediction models with small sample sizes by handling limited sample data. The method integrates the equivalent structural stress method with the maximum likelihood estimation method and adds reliability verification, resulting in enhanced goodness of fit, stability, and optimized sample quantity.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Cooper K. Hansen, Gary F. Whelan, Jacob D. Hochhalter
Summary: This paper presents a method to address the computational demand issue of computing FIPs using CPFEM by developing an interpretable machine learning model. Genetic programming is used to evolve interpretable expressions of FIPs from microstructure features, and these models can serve as efficient substitutes for CPFEM and be easily integrated into engineering workflows.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Luca Susmel
Summary: This paper discusses the problem of estimating notch fatigue limits using machine learning. The results show that machine learning is a promising approach for designing notched components against fatigue. The accuracy in estimating the fatigue limit can be increased by increasing the size and quality of the calibration dataset, as well as including additional input features.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
Article
Engineering, Mechanical
Kefeng Gao, Guoqi Tan, Yanyan Liu, Qiang Wang, Qian Tang, Xuegang Wang, Qiqiang Duan, Zengqian Liu, Zhe Yi, Zhefeng Zhang
Summary: Bioinspired architectures have significant effects on material enhancement. This study investigates the fatigue properties of bioinspired ceramic-polymer composites and natural nacre, revealing the close relationship between architectural types, orientations, fatigue performance, and damage mechanisms.
INTERNATIONAL JOURNAL OF FATIGUE
(2024)
