Review
Mechanics
Peiyuan Zuo, Dharun Srinivasan, Anastasios P. Vassilopoulos
Summary: Hybrid composites are popular in contemporary structural applications, offering additional benefits by mixing fibers of varying qualities to improve performance without significantly affecting costs. One key area of improvement resulting from hybridization is fatigue behavior, although further research is needed to fully explore this aspect across a wide range of hybrid composites.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Mechanical
Ales Zorman, Janko Slavic, Miha Boltezar
Summary: The study introduces a fatigue-life estimation method for non-stationary excitation based on the short-time spectral narrowband method, showing significant accuracy improvement in both numerical and real experiments.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Green & Sustainable Science & Technology
M. Laporte-Azcue, P. A. Gonzalez-Gomez, M. R. Rodriguez-Sanchez, D. Santana
Summary: The key to the successful deployment of solar-power-towers lies in the reliable design of solar receivers, ensuring their lifetime under high heat flux and cloud passages. The study found that creep is the dominant damage mechanism, while fatigue is also present but minimally affected by the number of start-ups per day. Using clear-sky instead of transient DNI estimates a lower predicted lifetime due to increased creep, showcasing the importance of understanding the different damage mechanisms for efficient operation.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Engineering, Mechanical
Fabian Weber, Haoran Wu, Peter Starke
Summary: The aim of this research is to develop a new short-time procedure based on the Palmgren-Miner linear damage accumulation, which can provide an S-N curve in the HCF regime based on the results of only one fatigue test. Load increase tests were conducted using NDT-methods to determine the partial damage per load level from the material response. By converting the calculated partial damage into the corresponding number of cycles to failure, an S-N curve can be generated. This research focuses on a quenched-tempered 20MnMoNi5-5 steel, with validation performed on three other steels.
INTERNATIONAL JOURNAL OF FATIGUE
(2023)
Article
Mechanics
Andrzej Katunin, Dominik Wachla, Paulo Santos, Paulo N. B. Reis
Summary: This study investigates the influence of hybridization on the fatigue limit of bio-composites made of flax, glass/flax, Kevlar/flax, and carbon/flax. The evaluation is done using the critical self-heating temperature and acoustic emission approaches, as well as microscopic characterization for analyzing fracture mechanisms. The results show that hybridization opens new possibilities for controlling the fatigue and fracture properties of composites, and the critical self-heating temperature determined during fatigue tests can serve as an alternative indicator of the fatigue limit of a composite structure, as justified by microscopic examination.
COMPOSITE STRUCTURES
(2023)
Article
Materials Science, Composites
Nicola Magino, Jonathan Kobler, Heiko Andra, Fabian Welschinger, Ralf Mueller, Matti Schneider
Summary: In this study, a computational strategy for characterizing short-fiber reinforced polymers under high-cycle fatigue loading is proposed. The strategy utilizes a mean-stress dependent fatigue-damage model and computational multiscale approaches to reduce the necessary mechanical tests. The effectiveness of the proposed strategy is demonstrated through simulation of stiffness degradation in fatigue experiments.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Mechanical
B. Blinn, T. Beck, B. Jost, M. Klein, D. Eifler
Summary: Fatigue testing under service loading conditions is essential for optimizing component design, but it requires high efforts in material, time, and costs. A modification of a physically based lifetime calculation method was used to estimate the Gassner curve of ductile cast iron. Different stress amplitudes during measuring intervals show no significant influence on fatigue lifetime and cyclic deformation behavior.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Engineering, Mechanical
S. Mazerat, R. Pailler
Summary: Multiple attempts have been made to interpret and predict the time to failure variability on SiC bundles due to slow-crack-growth. External discrete phenomena such as fiber sticking or load sharing have been pointed out as contributing factors. However, a new original theory was proposed in this study, which introduced a bias on tow section and applied stress in addition to filament strength distribution, leading to consistent results through a Monte-Carlo algorithm.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Nuclear Science & Technology
Wenhai Guan, Hyoseong Gwon, Takanori Hirose, Hisashi Tanigawa, Yoshinori Kawamura, Motoki Nakajima, Takashi Nozawa
Summary: This study conducted creep-fatigue tests on F82H at 823 K, comparing tension holding with compression holding. It was found that CF damages were within the damage envelope of Grade 91 in ASME NH, indicating the potential resistance of the cylindrical WCCB TBM design under ITER thermo-mechanical load conditions.
FUSION ENGINEERING AND DESIGN
(2021)
Article
Chemistry, Multidisciplinary
Tobias Bill, Ruth Acosta, Christian Boller, Kai Donnerbauer, Lukas Luecker, Frank Walther, Klaus Heckmann, Juergen Sievers, Tim Schopf, Stefan Weihe, Peter Starke
Summary: AISI 347 austenitic steel is commonly used in nuclear energy piping systems due to its resistance to high stresses, however, the material's properties can change significantly over time, especially when exposed to corrosive influences. The StrainLife procedure, developed as part of the MiBaLeB project, allows for a more efficient assessment of aging materials by determining a complete S-N curve with only three fatigue tests. This approach is particularly useful for rare aged materials where a cost-effective solution is needed.
APPLIED SCIENCES-BASEL
(2021)
Article
Mechanics
A. Goumghar, M. Assarar, W. Zouari, K. Azouaoui, A. El Mahi, R. Ayad
Summary: This paper presents an experimental study on the fatigue behavior of non-hybrid and hybrid twill flax and glass fabric-reinforced epoxy laminates. The results show that the flax-glass hybridization improves the fatigue performance of the glass-epoxy laminate. The acoustic emission (AE) analysis helps identify the main damage mechanisms of the materials.
COMPOSITE STRUCTURES
(2022)
Article
Computer Science, Interdisciplinary Applications
Ewelina Cholodowicz, Przemyslaw Orlowski
Summary: Based on the development trend of logistics systems, this study designs a dynamic discrete-time inventory model to improve realism and accuracy. It includes factors such as perishable products, issuing policies, lead time, demand, and closing days. By introducing the Weibull distribution, the accuracy of reflecting the performance of real physical inventory systems can be improved.
COMPUTERS & INDUSTRIAL ENGINEERING
(2021)
Article
Engineering, Mechanical
Filipe Ribeiro, Jose Sena-Cruz, Anastasios P. Vassilopoulos
Summary: This study investigates the behavior of hybrid glass/ultra-high modulus carbon and low modulus/high modulus carbon fiber composites, revealing that the low modulus/high modulus carbon fiber composites have higher initial elastic modulus and strength, while the glass/ultra-high modulus carbon fiber composites exhibit the highest pseudo-ductile strain.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Engineering, Mechanical
Elena Garcia Trelles, Christoph Schweizer
Summary: The proposed crack growth model for ductile cast iron materials is based on the relationship between crack advance per cycle and cyclic crack tip opening displacement. It takes into account intergranular embrittlement as a temperature and strain rate dependent crack accelerating mechanism, and has been successfully applied to predict temperature dependent fatigue lifetime and short crack growth.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Review
Materials Science, Composites
Gustavo B. Carvalho
Summary: Ternary hybrid composites of PP/GF/HGB were prepared using different treatments of HGB particles and evaluated in bending and fatigue tests. The presence of untreated HGB particles led to higher fiber-polymer interfacial decoupling compared to aminosilane-treated HGB particles. The dynamic mechanical thermal analysis results successfully revealed the microstructural behavior of the hybrid composites.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(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)