Article
Mechanics
Saeed Zare Chavoshi, Rick Bradford, Julian Booker
Summary: This paper introduces a possible approach for incorporating probabilistic structural integrity assessment, called the Three-Term Reference Damage Model (3T-RDM), which is developed in the context of a particular benchmark problem and a proposed Design Chart. The accuracy and generality of the 3T-RDM method is further validated through deterministic and Monte Carlo probabilistic structural integrity assessments for three EDF nuclear plant case-studies, showing excellent consistency between the results.
ENGINEERING FRACTURE MECHANICS
(2021)
Article
Construction & Building Technology
Bhaskar Pratim Das, Saswati Das, Anjan Kumar Siddagangaiah
Summary: Fatigue cracking is a major distress in asphalt pavements, with factors like aging and moisture intrusion complicating the process. This study used a probabilistic approach to examine the effects of aging and moisture conditioning on fatigue damage in asphalt mixtures. The results showed that stiffness modulus and fatigue life of asphalt mixtures increased with aging levels, but decreased with more moisture conditioning cycles. Moisture had a greater negative impact on fatigue life at lower temperatures, and the probability of fatigue damage was higher in moisture conditioned asphalt mixtures.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Mechanics
R. Sachse, A. K. Pickett, P. Middendorf
Summary: In this paper, a systematic study was conducted on the effect of mechanical design features on fatigue crack growth in adhesive joints. A material model and methodology for fatigue crack growth analysis were presented. The results suggest that a combination of local reinforcement, through-thickness reinforcement, and compression preload are necessary for efficient crack growth arrest, while simply reducing peel stresses is not sufficient. Increasing the effective crack front length and introducing through-thickness stresses can significantly reduce local fatigue crack growth rates.
COMPOSITE STRUCTURES
(2021)
Article
Green & Sustainable Science & Technology
Liang Dong, Wai Hou Lio, Georg Raimund Pirrung
Summary: This study presents an adaptive turbulence-based control (ATBC) method to retain the robustness and performance of a wind turbine controller under different turbulence intensity by optimizing control parameters. By establishing an ASE model and damage prediction method, it achieves the optimal trade-off between rotor speed variation and turbine component damage.
Article
Engineering, Aerospace
Qiang Ren, Xiaojun Wang, Shanglu Shi, Yujia Ma, Jing Wang, Xuyun Ding
Summary: This paper presents a comprehensive design method for composite laminated structures under mechanical-thermal coupling environments, considering static, fatigue, and damage tolerance requirements simultaneously. The method accurately quantifies the additional stress and deformation caused by mechanical-thermal coupling, and includes a new damage evolution-based fatigue reliability evaluation method. Furthermore, different failure modes of composite materials are taken into account during the damage evolution analysis.
Article
Construction & Building Technology
Ayat Al Assi, Husam Sadek, Carol Massarra, Mohammed Sadeq, Carol J. Friedland
Summary: The study focuses on developing a user-friendly analysis tool that determines the Nf following the VECD approach with incorporating probabilistic analysis. By defining the proper distribution function for each RV in the VECD-Nf model, developing a simple analysis tool using MATLAB App Designer, and reanalyzing previous studies data for HMA and FWMA mixtures, the P-VECD analysis tool allows for deterministic VECD analysis, probabilistic VECD analysis, and prediction of fatigue life of asphalt mixtures for technicians and engineers in the asphalt community.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Onur Gunes, Elif Altunsu, Ali Sarib
Summary: The turbine industry demands a reliable design with affordable cost, and design safety conditions become increasingly important. Turbines are exposed to environmental conditions that can impact their installation, durability, and operation. Through analysis of design load cases and the use of open-source software, assessing turbine behavior and fatigue damage to study their impact on economic service life.
WIND AND STRUCTURES
(2021)
Article
Engineering, Multidisciplinary
Yisu Chen, Di Wu, Haifeng Li, Wei Gao
Summary: This study explores the long-term failure of wind turbines caused by tropical cyclones and proposes a new evaluation framework. By considering the changes in cyclone direction and intensity, as well as factors such as the blade status of parked wind turbines, a synthetic assessment of the damage potential of cyclones is conducted. The findings of this study are significant for the design of wind energy systems in cyclone-prone regions.
APPLIED MATHEMATICAL MODELLING
(2022)
Review
Materials Science, Multidisciplinary
Uwe Zerbst, Giovanni Bruno, Jean-Yves Buffiere, Thomas Wegener, Thomas Niendorf, Tao Wu, Xiang Zhang, Nikolai Kashaev, Giovanni Meneghetti, Nik Hrabe, Mauro Madia, Tiago Werner, Kai Hilgenberg, Martina Koukolikova, Radek Prochazka, Jan Dzugan, Benjamin Moeller, Stefano Beretta, Alexander Evans, Rainer Wagener, Kai Schnabel
Summary: The article discusses key challenges in the damage-tolerant design of additively manufactured parts, highlighting parameters affecting damage tolerance and introducing new concepts that impact fatigue life determination. This interlinking of component design, damage criteria, and characterization represents a current challenge for engineers and materials scientists in the field.
PROGRESS IN MATERIALS SCIENCE
(2021)
Article
Chemistry, Physical
Lukasz Blacha
Summary: A non-linear modification to Miner's rule has been proposed to reduce the scatter between experimental fatigue life and predicted fatigue life, demonstrating the effectiveness of the modification for non-normal distributions.
Article
Polymer Science
Roman Ruzek, Josef Krena, Radek Doubrava, Josef Tkadlec, Martin Kadlec, Petr Belsky
Summary: This paper discusses research work on a newly designed passenger door structure demonstrator made of carbon-fiber-reinforced thermoplastic resin. Structural verification was carried out using numerical simulations and experiments according to the damage tolerance philosophy. Topological optimization of metal hinges and verification of mechanical properties were conducted, showing expected results.
Article
Materials Science, Multidisciplinary
Xiaoran Liu, Xiaolu Wang, Zhanhe Liu, Zhiqiang Chen, Qin Sun
Summary: Based on continuum damage mechanics, a probabilistic method is proposed to predict high-cycle fatigue life for metallic materials. This method combines macro-meso two-scale stress-strain equations, randomized parameters, and non-intrusive polynomial chaos to establish the probabilistic prediction of fatigue life. Experimental results validate the effectiveness of the proposed method.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Energy & Fuels
Stian H. Sorum, George Katsikogiannis, Jorgen Amdahl, Ana M. Page, Rasmus T. Klinkvort
Summary: A sensitivity study was conducted to investigate the impact of input parameter uncertainties on fatigue analyses of offshore wind turbines. The results showed that the uncertainty in the SN curves and fatigue capacity primarily governed the fatigue utilization. The uncertainty in environmental conditions, particularly wind loads, became increasingly important with larger turbine sizes. Accurate models and a focus on environmental conditions are recommended to reduce the uncertainty in design.
Article
Engineering, Mechanical
Dongping Zhu, Zhixia Ding, Xiaogang Huang, Xuan Li
Summary: The success of wind energy depends on the reliability of wind turbines. A novel probabilistic modeling framework is proposed to evaluate the long-term fatigue reliability of wind turbines. The framework leverages Markov model and subset simulation to reduce computational costs and increase feasibility.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Green & Sustainable Science & Technology
Zhiyu Jiang, Yihan Xing
Summary: This paper proposes a method to adjust the individual pitch rate of each blade during an emergency shutdown of wind turbines, aiming to reduce the imbalanced aerodynamic loads on the rotor. Using a high-fidelity aeroelastic model, the effectiveness of the method is demonstrated in reducing bending moments at the main shaft and tower bottom.
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)