Article
Engineering, Mechanical
Jingwei Zhao, Bingbing Li, Gang Chen, Takamoto Itoh, Xu Chen
Summary: Fatigue tests on 316LN stainless steel showed that the introduction of tensile strain hold had a more deleterious effect on TMF performance, and an inelastic relaxation strain rate is more appropriate for characterizing creep damage.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Engineering, Mechanical
Yiming Zheng, Bingbing Li, Jingwei Zhao, Caiming Liu, Takamoto Itoh, Xu Chen
Summary: Investigating fatigue crack growth behavior is crucial for the design and safety evaluation of engineering structures. In this study, a new thermomechanical fatigue (TMF) crack propagation testing method was developed for variable temperature conditions, and its validity was proven through a series of tests.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2022)
Article
Engineering, Multidisciplinary
Qiang Lin, Xu Chen, Yiming Zheng, Zhe Zhang, Gang Chen, Bingbing Li
Summary: The effects of multiaxial loading on the isothermal fatigue and thermomechanical fatigue behavior of 316LN stainless steel were studied. It was found that multiaxial loading caused asymmetry in stress-strain hysteresis loops and changes in grain boundaries, leading to more damage and significant reduction in fatigue life.
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2022)
Article
Engineering, Mechanical
Bingbing Li, Yiming Zheng, Gang Chen, Takamoto Itoh, Xu Chen
Summary: The effects of strain amplitude on the isothermal fatigue and thermomechanical fatigue behaviors of 316LN stainless steel were studied and the physical mechanisms for the evolution of cyclic stress response were revealed. The manifestations of dynamic strain aging, dependence on loading modes and influence on deformation properties were discussed. A change in the dominated damage mechanism occurred at a strain amplitude of approximately 0.27%, where the isothermal fatigue and thermomechanical fatigue life curves intersected. The maximum stress was found to be an appropriate damage parameter for life prediction with a scatter band of 1.5.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Mechanical
Qingtong Wang, Bingbing Li, Jingwei Zhao, Takamoto Itoh, Xu Chen
Summary: Isothermal and thermomechanical fatigue tests were performed with different tension dwell times, and the cyclic stress response and stress relaxation behavior were analyzed using TEM and EBSD. The results showed that fatigue was the dominant mechanism for crack initiation and propagation in all creep-IF tests, leading to specimen fracture. However, in creep-TMF tests, when the dwell time increased to 1800 s, the dominant damage mechanism shifted to creep-fatigue interaction, resulting in intergranular fracture mode and a significantly shorter life. Additionally, a life prediction model based on tension strain energy was proposed.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Materials Science, Multidisciplinary
Zhiheng Xiong, Yunxin Wang, Bin Yang, Yanli Wang
Summary: This study investigates the effects of orthogonal scratches on the stress corrosion cracking (SCC) sensitivity of 316LN stainless steel. The experimental results show that at the intersection of orthogonal scratches, larger strain concentration and more oxide particles are formed, resulting in greater SCC sensitivity.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Review
Crystallography
Jingwei Zhao, Feng Qiu, Chuangang Xu
Summary: The present paper reviews the research on the creep-thermomechanical fatigue (CTMF) behaviors of austenitic stainless steel for nuclear power plant pipelines. The stress response behavior, main damage mechanisms, and the effects of strain dwell type, dwell time, and temperature-strain phase angle on fatigue life behavior are systematically discussed. It is emphasized that CTMF is closer to the actual service condition of nuclear power plant pipes, and the traditional design method based on isothermal fatigue test data is not conservative. The research on CTMF behaviors of austenitic stainless steel for nuclear power plant is summarized and prospected.
Article
Engineering, Mechanical
Jianhua Ding, Jibo Tan, Ziyu Zhang, Xiang Wang, Xinqiang Wu, En-Hou Han, Wei Ke
Summary: A hollow specimen filled with lead-bismuth eutectic (LBE) was designed to investigate the low cycle fatigue behavior of 316LN stainless steel (SS) at 400°C in air and LBE. The fatigue life of 316LN SS in liquid LBE was only reduced at high strain amplitudes (>0.8%). At low strain amplitudes, fatigue cracks initiated at the outer surface in liquid LBE, while the opposite was observed at high strain amplitudes. The oxygen concentration did not affect the fatigue life of 316LN SS in liquid LBE. The corrosion fatigue damage mechanism for 316LN SS in liquid LBE was discussed.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Nuclear Science & Technology
Ziyu Zhang, Jibo Tan, Xinqiang Wu, En-Hou Han, Wei Ke
Summary: This study investigated the corrosion fatigue crack growth (FCG) behavior of 316LN stainless steel in high-temperature pressurized water, finding that environmental assistance affects the FCG rate depending on critical values of load ratio and rise time. The FCG rate showed a linear relationship with stress intensity factor range, and quantitative relations were proposed.
NUCLEAR ENGINEERING AND TECHNOLOGY
(2021)
Article
Engineering, Mechanical
Bingbing Li, Jingyu Yang, Zongchi Wang, Gang Chen, Xu Chen
Summary: Continuous and interrupted LCF tests were performed to investigate the impact of temperature, strain rate, and strain amplitude on the LCF behavior of nitrogen-alloyed 316LN stainless steel. The cyclic hardening and softening behavior at different strain amplitudes were analyzed using stress decomposition method and characterization of dislocation configuration evolution. Furthermore, the primary damage mechanism leading to various cracking modes under different loading conditions was determined based on the examination of fracture surface and secondary cracks on the longitudinal section.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Engineering, Mechanical
Gang Chen, Chengcheng Li, Mingwei Xie, Bingbing Li, Qiang Lin
Summary: A modified damage-coupled unified constitutive model based on the Abdel-Karim and Ohno model is proposed for 316LN stainless steel. The model shows validity in describing low-cycle fatigue and creep-fatigue interaction, and accurately simulates the cyclic stress response and hysteresis loops throughout the whole-life time.
INTERNATIONAL JOURNAL OF PLASTICITY
(2023)
Article
Nanoscience & Nanotechnology
T. Babinsky, I. Sulak, I. Kubena, J. Man, A. Weiser, E. Svabenska, L. Englert, S. Guth
Summary: This study investigates the thermomechanical fatigue behavior of additively manufactured metallic materials, specifically focusing on the 316L austenitic stainless steel. The findings highlight the crucial role of microstructural texture and the number of grain boundaries in determining the performance of these materials under different loading conditions.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
J. Vanaja, H. C. Dey, G. V. Prasad Reddy, K. Laha, M. Vasudevan
Summary: Microstructural features and creep-rupture behavior of a dissimilar weld joint (DWJ) between Grade 91 (G91) steel and 316LN stainless steel prepared by Electron beam (EB) welding are investigated. The study reveals compositional variations and distinct microstructural features in the fusion zone, as well as nickel enrichment at the interface between the fusion zone and G91 steel, resulting in fresh martensite and higher hardness. Creep-rupture tests show that failure location shifts from the G91 base metal to the intercritical HAZ of G91 steel, but the ruptured specimens in this study exhibit better interface stability and insignificant cavitation even after prolonged creep exposure.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Renxian Yang, Shucheng Ma, Xin Cai, Xiaoqiang Hu, Dianzhong Li
Summary: The addition of cerium can significantly improve the rupture life of 316LN austenitic stainless steel under high stress, but may cause anomalous growth rate and reduce the creep rupture ductility under low stress.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Physical
Wan-Kyu Choi, Sangyul Ha, Jong-Cheon Kim, Jong-Cheon Park, Aokai Gong, Tae-Won Kim
Summary: Austenitic stainless steel is an essential material in various industries due to its excellent heat and corrosion resistance. It is widely used in high-temperature environments for internal combustion engines and power plant piping. This study focuses on the fatigue life and oxidation damage of austenitic stainless steel, and proposes a unified low-cycle fatigue life model considering the fracture mechanism and the influence of oxidation damage.
Article
Engineering, Mechanical
Bingbing Li, Yiming Zheng, Gang Chen, Takamoto Itoh, Xu Chen
Summary: The effects of strain amplitude on the isothermal fatigue and thermomechanical fatigue behaviors of 316LN stainless steel were studied and the physical mechanisms for the evolution of cyclic stress response were revealed. The manifestations of dynamic strain aging, dependence on loading modes and influence on deformation properties were discussed. A change in the dominated damage mechanism occurred at a strain amplitude of approximately 0.27%, where the isothermal fatigue and thermomechanical fatigue life curves intersected. The maximum stress was found to be an appropriate damage parameter for life prediction with a scatter band of 1.5.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Materials Science, Composites
Yue Liu, Jikang Li, Yue Kuang, Yongzhong Zhao, Min Wang, Hongtao Wang, Xu Chen
Summary: In this paper, carbon nanotube-modified carbon fibre/polyimide (CF/CNTs/PI) multi-scale composites were prepared by introducing amino-functionalized multi-walled CNTs into a PI resin matrix using an ultrasonic dispersion method. The interlaminar properties of the prepared composites were comprehensively evaluated by double cantilever beam (DCB), end-notched flexure (ENF), and short seam shear (SBS) tests. The addition of 0.5wt.% CNTs increased the Mode I and Mode II interlaminar fracture toughness of the material by 50.21% and 61.74%, respectively, and the interlaminar shear strength (ILSS) by 42.85%. The mechanisms of CNTs bridging the crack tip and enhancing the fibre/matrix interface bonding ability were dominant in improving the interlaminar properties.
JOURNAL OF COMPOSITE MATERIALS
(2023)
Article
Materials Science, Composites
Jikang Li, Zheng Liu, Yajing Li, Yongzhong Zhao, Min Wang, Hongtao Wang, Xu Chen
Summary: Glass fiber reinforced plastic (GFRP) was fabricated by molding with phenolic resin as the matrix in this study. The distribution, tensile properties, creep performance, and damage mechanism of GFRP were systematically investigated. Results showed that horizontal specimens had better tensile properties, lower viscoelasticity, and excellent creep resistance. The fibers exhibited a 3D core-shell morphology with transverse isotropy. Load was carried by the fibers and damage was in the form of fiber fracture and pull-out in horizontal specimens. Random distribution and interweaving resulted in double fracture sections of fibers in vertical specimens. Load was carried by the interface and resin, and damage was in the form of fiber pull-out and interfacial debonding. The high viscoelasticity of the resin and weak interfacial bonding ability led to large creep deformation in vertical specimens. Additionally, the creep strain under different loads could be accurately predicted by Modified Time Hardening model.
POLYMER COMPOSITES
(2023)
Article
Nanoscience & Nanotechnology
Zongchi Wang, Shouwen Shi, Jingtai Yu, Bingbing Li, Yajing Li, Xu Chen
Summary: A cryogenic cyclic plastic strengthening method is proposed in this paper to improve the yield strength and maintain high elongation by changing the microstructure of the material.
SCRIPTA MATERIALIA
(2023)
Article
Mechanics
Xiao Han, Xingyue Sun, Xu Chen
Summary: A locally assembled stiffness matrix method is proposed as a novel solution process for global stiffness matrices in triangular meshes of the linear-elastic plane problem. Each nonzero submatrix after assembly is considered as the locally assembled stiffness matrix (LASM). By using an artificial neural network based on the same physics, the proposed method achieves good agreement with the conventional finite element method while reducing computation time and storage by 48.42% and 77.73% respectively.
Article
Materials Science, Multidisciplinary
Hailong Dai, Shouwen Shi, Jiahui Tang, Can Guo, Zuoliang Ning, Xu Chen
Summary: The effect of heat treatment on the stress corrosion cracking of Monel 400 alloy in hydrofluoric acid vapor was studied using cracking crystallographic analysis. Different heat treatment temperatures have varying effects on the SCC of the alloy, with heat treatment increasing grain size and reducing residual strain. Large grains promote slip and active dissolution, increasing SCC susceptibility.
Article
Engineering, Mechanical
Shouwen Shi, Jianpeng Cui, Haiyan Li, Gang Chen, Qiang Lin, Xu Chen
Summary: The effect of temperature on the microcracking mechanisms of modified 9Cr-1Mo steel was investigated through low cycle fatigue tests conducted at 350 degrees C and room temperature (RT). At RT, the response of cyclic stress at low strain amplitude (<0.5%) is influenced by friction stress while at high strain amplitude it is dominated by back stress. In comparison, the disappearance of sub-grain boundaries due to dislocation annihilation occurs at 350 degrees C, resulting in a decrease in back stress and a more significant effect of back stress compared to RT. Due to the accumulated fatigue damage, the distance between two parallel extrusions at 350 degrees C is larger than at RT, which can be attributed to the disappearance of low angle sub-grain boundaries at 350 degrees C. As a result, microcracks initiate along high-angle grain boundaries at 350 degrees C instead of along low-angle grain boundaries observed at RT.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2023)
Article
Engineering, Mechanical
Xiaowen Wei, Zhe Zhang, Liting Shi, Jidong Kang, Xu Chen
Summary: Dissimilar material joined structures are increasingly used in the automotive industry to reduce weight. A mechanoresponsive luminogen-based method using an organic mechanochromic luminescence material is used to detect fatigue damage in coach peel Al-steel resistance spot welds. The fluorescence intensity increases linearly in the early stage of fatigue cycles and grows much faster in specimens with lower fatigue life. A new fatigue life prediction method has been developed based on the response of fluorescence intensity.
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2023)
Article
Materials Science, Multidisciplinary
Can Guo, Shouwen Shi, Hailong Dai, Xingyue Sun, Jingtai Yu, Xu Chen
Summary: The corrosion behavior of Monel 400 alloy in HF vapor and liquid phases was compared in this study. It was found that more severe corrosion occurred in the vapor phase, which was attributed to the difference in corrosion product layer. Specifically, a loose and porous fluoride layer was observed in the vapor phase, while a compact oxide layer was formed in the liquid phase. According to thermodynamic analysis, the formation of fluoride layer could be caused by higher O2 content, HF concentration, or corrosion product deposition in the vapor phase, with corrosion product deposition playing the dominant role.
Article
Materials Science, Multidisciplinary
Hailong Dai, Shouwen Shi, Can Guo, Zuoliang Ning, Yue Kuang, Xu Chen
Summary: The stress corrosion mechanism of Monel 400 alloy in HF vapor was investigated, considering the synergistic effect of HF vapor corrosion and dislocation sliding. The results revealed that oxygen-assisted corrosion in HF vapor worsens the fluorination effect and leads to severe fluorination degradation of Monel 400 alloy. The formation of CuF2 harms the Ni element in the matrix and results in denickelification. Dislocation sliding not only accelerates corrosion degradation but also facilitates the initiation of transgranular cracks by tearing the denickelification layer. A law of crack initiation based on the Schmid factor is proposed.
Article
Mechanics
Jinhui Feng, Zheng Liu, Shouwen Shi, Shaowu Feng, Gang Chen, Xu Chen, Qiang Lin
Summary: The embrittlement behavior of two modified 9Cr-1Mo steels in liquid LBE was investigated. The results showed that the modified steels had improved mechanical properties compared to the original steel, and the embrittlement mechanism was temperature-dependent.
ENGINEERING FRACTURE MECHANICS
(2023)
Article
Chemistry, Physical
Xiaoran Wei, Kun Zhou, Shaowu Feng, Shouwen Shi, Qiang Lin, Gang Chen, Kai Song, Xu Chen
Summary: The research on degradation and failure of proton exchange membrane (PEM) is essential for studying cell failure. Automatic crack propagation tracking is necessary to provide detailed data on PEM fatigue behavior. CrackTracker, a Transformer-based model, was proposed to meet the specific characteristics of PEM and achieve high-performance crack tracking. Detailed comparisons with four widely used models demonstrated the superiority of CrackTracker in accuracy, efficiency, and generalization performance. Its fast inference speed and accurate detection of PEM cracks make it valuable for process safety management.
JOURNAL OF POWER SOURCES
(2023)
Article
Multidisciplinary Sciences
Tianguo Zhou, Xingyue Sun, Xu Chen
Summary: This study proposes a physics-guided modelling method to improve the generalization of artificial neural network (ANN) models on the prediction of multiaxial irregular cases. By introducing prior physical knowledge into the ANN model, the method achieves satisfactory performance and better extrapolation ability in predicting fatigue life. Compared with conventional models, the prediction errors are significantly reduced.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)
Article
Nanoscience & Nanotechnology
Zongchi Wang, Shouwen Shi, Jingtai Yu, Bingbing Li, Yajing Li, Xu Chen
Summary: In this paper, the cryogenic cyclic plastic strengthening (CCPS) method was used to strengthen 304 austenitic stainless steel, resulting in a material that combined multiscale structure and transformation-induced plasticity (TRIP) effect. After strengthening, harder small α'-martensite particles were formed in the austenite coarse grains, leading to dynamic strain partitioning during uniaxial tension tests at room temperature. Furthermore, martensitic transformation occurred steadily throughout the strain range of the tensile tests. At room temperature, the characteristics of cryogenic transformation were maintained and the saturation value of the transformation was increased. The strengthened material exhibited an excellent combination of high strength and ductility at room temperature.
SCRIPTA MATERIALIA
(2023)
Article
Engineering, Multidisciplinary
Jikang Li, Zheng Liu, Yue Liu, Yongzhong Zhao, Min Wang, Hongtao Wang, Xu Chen
Summary: In this paper, carbon fiber reinforced plastic was prepared using phenolic resin as the matrix by the molding method. The distribution of fibers inside the material and its influence on tensile fracture mechanism and creep properties were investigated. The experimental results show that horizontal specimens with a large number of fibers parallel to the tensile direction exhibit more excellent tensile properties. The difference in tensile fracture mechanism of horizontal and vertical specimens affects the creep properties of CFRP. Modified Time Hardening model can accurately fit all experimental data. Creep curves can be predicted based on the model parameters.
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2023)
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)
