Article
Engineering, Marine
Y. Dong, Y. Garbatov, C. Guedes Soares
Summary: A probabilistic distribution for fatigue stress on ship structural joints is developed considering uncertainty, with the influence of secondary notches on fatigue cycles taken into account. The reliability assessment is based on the notch strain approach, incorporating misalignment, residual stress, and secondary notch effects. Various modeling options and the sensitivity of reliability estimates to variable uncertainty are analyzed.
Article
Engineering, Mechanical
C. Danekas, S. Heikebruegge, J. Schubnell, P. Schaumann, B. Breidenstein, B. Bergmann
Summary: This study demonstrates that deep rolling, a mechanical surface treatment method, can significantly improve the fatigue life of welded joints, especially when a larger tool diameter is used.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Engineering, Marine
Yu Qiu, Wei Shen, Renjun Yan, Linzhi Xu, Enqian Liu
Summary: This paper researches the fatigue reliability of thin plate welded joints, finding that the reliability indexes are closely related to the plate thickness and the tolerance recommended by traditional codes should be corrected accordingly. It is important to consider the initial deformation of thin plate joints in fatigue reliability analysis.
Article
Engineering, Marine
Y. Dong, Y. Garbatov, C. Guedes Soares
Summary: An improved effective notch strain approach is developed for the fatigue reliability assessment of fillet welded cruciform joints in both low and high cycle fatigue regions. The method considers uncertainties and uses response surface models to avoid iterative calls of finite element analysis. The critical fatigue notch factor concept is proposed for direct reliability approximation.
Article
Engineering, Mechanical
Hamidreza Rohani Raftar, Edris Dabiri, Antti Ahola, Timo Bjork
Summary: This paper presents a fatigue analysis of load-carrying fillet welded joints using literature data and focuses on the application of the 4R method for a thorough re-evaluation. The results show that the 4R method can improve the accuracy of fatigue evaluation for weld root failure in such joints.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Chemistry, Physical
Alberto Campagnolo, Paolo Ferro, Luca Romanin, Giovanni Meneghetti
Summary: The study investigates the applicability of the Peak Stress Method (PSM) using coarse meshes to estimate the Residual Notch Stress Intensity Factors (R-NSIFs) in a butt-welded joint. The results indicate that PSM based on tetra elements can effectively estimate R-NSIFs using coarse meshes and analyze complex 3D joint geometries.
Article
Engineering, Mechanical
Mikkel Lovenskjold Larsen, Joerg Baumgartner, Henrik Bisgaard Clausen, Vikas Arora
Summary: A new approach based on principal component analysis is developed in this paper to quantify the level of non-proportionality in stress signals in welded structures. The proposed approach accurately captures the level of non-proportionality and can be used for accurate estimation of fatigue life.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Engineering, Mechanical
Gabriele Bufalari, Henk den Besten, Miroslaw Lech Kaminski
Summary: The dominant response mode of maritime structures can be multi-axial, including out-of-plane mode-III shear components. Semi-analytical mode-III notch stress distribution formulations have been established for critical details such as welded T-joints and cruciform joints, reflecting (non-)symmetry with respect to half the plate thickness. By using an effective notch stress based on the stress distribution formulation as a fatigue strength criterion, the mid-cycle fatigue resistance characteristics of mode-III welded joints were investigated. Compared to mode-I, the results suggest that the fatigue damage process for mode-III is even more surface initiation-related.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Construction & Building Technology
Zhi-Yu Jie, Wu-Jun Wang, Ping Zhuge, Ya-Dong Li, Xing Wei
Summary: Experimental and numerical investigations were conducted on the fatigue properties of inclined corroded cruciform joints, revealing that pitting corrosion damage reduces fatigue strength. However, specimens without and with smaller corrosion pits exhibited similar fatigue strengths. Pit depth and radius are the main parameters affecting the relative hot spot stress concentration factors.
ADVANCED STEEL CONSTRUCTION
(2021)
Article
Engineering, Mechanical
Hamidreza Rohani Raftar, Mohammad Dabiri, Antti Ahola, Timo Bjo
Summary: The re-evaluation of fatigue strength for load-carrying fillet welded joints failing from weld root was conducted, investigating different reference radii to assess the fatigue strength of weld root. A new FAT class with modified slope was proposed to enhance the accuracy of the current recommended class, particularly for thin joints with r(ref) = 0.3 mm.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Engineering, Mechanical
Pietro Foti, Davide Crisafulli, Dario Santonocito, Giacomo Risitano, Filippo Berto
Summary: This study investigates the effects of geometrical parameters and geometrical imperfections on the fatigue strength of cruciform welded joints using the SED method, and compares the predictions with known codes. The SED method is proven to be a valid tool for studying different loading and boundary conditions, and providing useful information for evaluating the most critical point in the component.
INTERNATIONAL JOURNAL OF FATIGUE
(2022)
Article
Thermodynamics
Huiying Gao, Xiaoqiang Zhang, Peng Huang, Hao Jiang, Zhoushuo Li
Summary: This study investigates the fatigue reliability assessment of welded joints and explicitly addresses the uncertainties. The sensitivity analyses reveal that misalignment, weld toe radius, and secondary notch are all significant sources of uncertainty. The practical difficulty in determining the uncertainty models of geometric parameters is discussed, and the impacts of acceptance limits on the fatigue reliability of welded joints are assessed.
ADVANCES IN MECHANICAL ENGINEERING
(2022)
Article
Metallurgy & Metallurgical Engineering
G. Mucci, J. Bernhard, J. Baumgartner, F. Frendo
Summary: This paper focuses on the fatigue life of laser beam and friction stir welded butt and overlap joints made from aluminium, comparing different fatigue assessment methods. The results indicate a relatively high fatigue strength of the tested friction stir welded overlap joints in comparison to literature data.
WELDING IN THE WORLD
(2021)
Article
Engineering, Mechanical
Farzaneh Samadi, Jeetendra Mourya, Greg Wheatley, Mohammed Nizam Khan, Reza Masoudi Nejad, Ricardo Branco, Wojciech Macek
Summary: This paper experimentally tested the residual stress and fatigue life of T-type welded joints with a multi-pass weld in different directions. The results showed that the residual stress increased gradually with the number of welding passes, and the fatigue life also improved. Performing multi-pass welding in different directions affects the material's residual stress and fatigue life, which is crucial for ensuring the strength of the welded joint.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Chemistry, Physical
Xingyuan Xu, Liyang Xie, Song Zhou, Jinlan An, Yanqing Huang, Youcheng Liu, Lei Jin
Summary: In order to test the fatigue properties of welded defective joints in high-speed rail bogies, SMA490BW steel cruciform welded joints with artificial defects were used. Fatigue tests were conducted on the specimens and the fatigue fracture morphology was studied using scanning electron microscopy. The stress distribution and concentration factor of cruciform welded joints with defects were calculated using ABAQUS (version 2022) finite element software. The results showed that the fatigue limits of the 1mm and 2.4mm defect specimens were approximately 57.2 and 53.75 Mpa, respectively. Furthermore, the stress concentration factor of the 1mm and 2.4mm defects increased by 98% and 198% compared to the no-defect case.
Article
Engineering, Mechanical
M. Zappalorto, P. A. Carraro
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2017)
Article
Engineering, Mechanical
G. Meneghetti, M. Zappalorto
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2017)
Article
Engineering, Mechanical
K. R. Rajagopal, M. Zappalorto
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2018)
Article
Polymer Science
Alessandra Bartolozzi, Roberta Bertani, Elisa Burigo, Alberto Fabrizi, Francesco Panozzo, Marino Quaresimin, Fabio Simionato, Paolo Sgarbossa, Sergio Tamburini, Michele Zappalorto, Federico Zorzi
JOURNAL OF APPLIED POLYMER SCIENCE
(2017)
Article
Materials Science, Multidisciplinary
M. A. Martin Rengel, F. J. Gomez, A. Rico, J. Ruiz-Hervias, J. Rodriguez
JOURNAL OF NUCLEAR MATERIALS
(2017)
Article
Materials Science, Ceramics
F. J. Gomez, Miguel Angel Martin-Rengel, Jesus Ruiz-Hervias, A. M. Fathy
BOLETIN DE LA SOCIEDAD ESPANOLA DE CERAMICA Y VIDRIO
(2019)
Article
Mechanics
Francesco Panozzo, Michele Zappalorto, Paolo Andrea Carraro, Marino Quaresimin
COMPOSITE STRUCTURES
(2018)
Article
Nuclear Science & Technology
M. A. Martin-Rengel, F. J. Gomez, J. Ruiz-Hervias
Article
Engineering, Multidisciplinary
F. J. Gomez, A. R. Torabi
INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING
(2019)
Article
Engineering, Mechanical
F. J. Gomez, A. Salazar, M. Martinez, S. K. Rana, J. Rodriguez
Summary: This study develops a numerical model based on the inverse methodology and optimization process to determine the fracture behavior of chocolate using notched samples. The results show that the model provides similar values for Young's modulus, maximum stress and fracture energy compared to experimental measurements.
THEORETICAL AND APPLIED FRACTURE MECHANICS
(2022)
Article
Polymer Science
C. Amaral, F. Gomez, M. Moreira, T. Silva, R. Vicente
Summary: This study focuses on the development and analysis of a new multifunctional facade panel incorporating PCM in foam layers. The thermal performance was analysed using a hotbox heat flux meter method, and the main findings are presented. Experimental tests in climatic chambers were used to calibrate and validate numerical simulations using Ansys Fluent, with a correlation factor of 0.9674 achieved. The results show the significant potential of the multi-layered panel with PCM incorporation in regulating indoor space temperature for thermal comfort.
Proceedings Paper
Engineering, Civil
S. Cicero, A. R. Torabi, H. R. Majidi, F. J. Gomez
1ST VIRTUAL EUROPEAN CONFERENCE ON FRACTURE - VECF1
(2020)
Proceedings Paper
Engineering, Civil
F. J. Gomez, S. Cicero, A. R. Torabi
1ST VIRTUAL EUROPEAN CONFERENCE ON FRACTURE - VECF1
(2020)
Proceedings Paper
Engineering, Mechanical
F. J. Gomez, A. R. Torabi
ECF22 - LOADING AND ENVIRONMENTAL EFFECTS ON STRUCTURAL INTEGRITY
(2018)
Article
Engineering, Multidisciplinary
Francesco Panozzo, Michele Zappalorto, Marino Quaresimin
COMPOSITES PART B-ENGINEERING
(2017)
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)