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Defects tolerance and fatigue limit prediction for laser powder bed fusion Ti6Al4V Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-17 Abdul Khadar Syed, Wilson Vesga, Ben Dutton, Tom Berentshaw, Xiang Zhang
This study is focused on the individual effect of gas porosity size and location on fatigue strength of a laser powder bed fusion Ti6Al4V alloy. Tensile and fatigue samples were manufactured by artificially seeding gas pores either at the centre or close to surface. Seeded porosity reduced the ductility by 20 % and fatigue strength by 33 % but had little influence on the static strength. Despite seeded
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Neural network based fatigue lifetime prediction of metals subjected to block loading Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-16 Jelle Plets, Quinten Bouckaert, Bilal Ahmed, Wim De Waele, Kris Hectors
Fatigue lifetime predictions for variable amplitude loading are primarily based on the linear damage accumulation rule of Palmgren-Miner, which does not account for load sequence effects. Various nonlinear models have been developed, but their generalization capability is limited. Although neural network models have been used for prediction of the lifetime of metals subjected to constant amplitude
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Study on predicting rolling contact fatigue of pitch bearing raceway in offshore wind turbine Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-15 Haifeng He, Yiming Chen, Xin Jin, Heli Liu, Chunmei Wang
Pitch bearing is the critical component that are widely used to ensure the operation of offshore wind turbine blades and enable efficient capture of wind energy. Uncertain environmental factors and extreme load conditions can induce early fatigue failure in pitch bearings, and lead to major accidents such as blade detachment. In this study, a damage coupling fatigue simulation model, considering residual
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Very high cycle fatigue of laser powder bed fused Al-Cu-Mg-Ag-TiB2 (A20X) Alloy: Stress relief and aging treatments Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-15 Maryam Avateffazeli, Shawkat I. Shakil, Alireza Behvar, Moataz M. Attallah, Jutima Simsiriwong, Andrea Tridello, Davide S. Paolino, Meysam Haghshenas
This study presents a comprehensive exploration of the fatigue response in the very high cycle fatigue (VHCF) regime for an additively manufactured (i.e., laser powder bed fused) A20X aluminum alloy. Although the need for high-performance materials with exceptional fatigue qualities has increased dramatically, the VHCF behavior of Al-Cu-Mg-Ag-TiB (A20X) structures remains largely unknown. A series
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Multi-objective design optimization of a transonic axial fan stage using sparse active subspaces Eng. Appl. Comput. Fluid Mech. (IF 6.1) Pub Date : 2024-03-12 Richard Amankwa Adjei, Chengwei Fan
In this paper, a multi-objective optimization strategy for efficient design of turbomachinery blades using sparse active subspaces is implemented for a turbofan stage design. The proposed strategy ...
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Dual-objective optimization strategy of self-adaptive transient pressure controller in water delivery engineering Eng. Appl. Comput. Fluid Mech. (IF 6.1) Pub Date : 2024-03-14 Boran Zhang, Wuyi Wan, Yuhang Wang, Qihua Ran, Xiaoyi Chen, Yue Fang, Saiyu Yuan, Huiming Zhang
Controlling pressure impact of water hammer is an important guarantee for safe and stable running of pipeline systems. Previously, we proposed a spring self-adaptive auxiliary control (SAC) system ...
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Rapid fatigue evaluation of additive manufactured specimens: Application to stainless steel AISI 316L obtained by laser metal powder bed fusion Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-14 M. Bemani, S. Parareda, D. Casellas, A. Mateo, R. Das, A. Molotnikov
Laser powder bed fusion additive manufacturing is a promising technology for manufacturing components in many industrial applications. These components are often subjected to cycling loading and there are concerns about their fatigue performance due to inherent anisotropy, defects, and surface roughness. However, conventional fatigue assessment is time-consuming and expensive. Consequently, several
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Microstructural influences on simultaneous strength and fatigue crack resistance in advanced High-Strength steels Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-14 Nader Heshmati, Mohammad Hoseini-Athar, Annika Borgenstam, Henrik Sieurin, Joachim Larsson, Peter Hedström
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Probabilistic notch fatigue assessment under size effect using micromechanics-based critical distance theory Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-14 Jin-Chao He, Shun-Peng Zhu, Changqi Luo, Wei Li, Qiang Liu, Yun He, Qingyuan Wang
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The influence of river discharge on energy transport in estuaries and its implication for the equilibrium bed profile Eng. Appl. Comput. Fluid Mech. (IF 6.1) Pub Date : 2024-03-12 Min Zhang, Bo Li, Tianyi Xie, Ian Townend, Tongtiegang Zhao, Huayang Cai
In this paper, we revisit the classical energy transport equation for pure tidal flows in estuaries by including the effects of residual water level and freshwater discharge. Starting from the one-...
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Static-dynamic damage mechanism and self-heating effect of a clean elastic polyurethane grouting material for trenchless rehabilitation under high stresses Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-13 Cuixia Wang, Zengni Qin, Xinghui Gong, Chao Zhang, Wang Pan, Yangyang Xia, Peng Zhao, Lei Wang, Jian Liang, Zhenyuan Hang, Weiliang Gao
Compared with traditional excavation rehabilitation, trenchless grouting rehabilitation technology has the advantages of fast, precise, and low-carbon, which has a broad application prospect in wind turbine foundation rehabilitation. In this work, a non-toxic, environment-friendly, fast-setting, high-strength, and high-toughness elastic polyurethane (PU) grouting material was proposed, and the static-dynamic
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Computational multiscale modelling of material interfaces in electrical conductors J. Mech. Phys. Solids (IF 5.3) Pub Date : 2024-03-13 Tobias Kaiser, Niklas von der Höh, Andreas Menzel
Material interfaces occur at various length scales and may exhibit significantly different properties than the surrounding bulk. Motivated by their importance for electrical engineering applications such as wire bonds and electrically conductive adhesives, the focus of the present work is on material interfaces in electrical conductors. In order to approximate the physical interphase (of finite thickness)
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Large rotation isogeometric shell model for alternating stiff/soft curved laminates including warping and interlayer thickness change Comput. Methods Appl. Mech. Eng. (IF 7.2) Pub Date : 2024-03-12 Leonardo Leonetti, Domenico Magisano, Giovanni Garcea
The mechanics of laminates made up of elastic alternating stiff/soft layers is dominated by bending and membrane actions in the stiff layers, while transverse shear deformations concentrate in the soft interlayers producing significant zigzag warping effects. Additionally, curved geometry and large deformations can induce an interlayer thickness strain affecting the overall response of the laminate
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A physics-informed GAN framework based on model-free data-driven computational mechanics Comput. Methods Appl. Mech. Eng. (IF 7.2) Pub Date : 2024-03-12 Kerem Ciftci, Klaus Hackl
Model-free data-driven computational mechanics, first proposed by Kirchdoerfer and Ortiz, replace phenomenological models with numerical simulations based on sample datasets in strain–stress space. In this study, we integrate this paradigm within physics-informed generative adversarial networks (GANs). We enhance the conventional physics-informed neural network framework by implementing the principles
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Gradient-annihilated PINNs for solving Riemann problems: Application to relativistic hydrodynamics Comput. Methods Appl. Mech. Eng. (IF 7.2) Pub Date : 2024-03-12 Antonio Ferrer-Sánchez, José D. Martín-Guerrero, Roberto Ruiz de Austri-Bazan, Alejandro Torres-Forné, José A. Font
We present a novel methodology based on Physics-Informed Neural Networks (PINNs) for solving systems of partial differential equations admitting discontinuous solutions. Our method, called Gradient-Annihilated PINNs (GA-PINNs), introduces a modified loss function that forces the model to partially ignore high-gradients in the physical variables, achieved by introducing a suitable weighting function
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Bayesian reinforcement learning reliability analysis Comput. Methods Appl. Mech. Eng. (IF 7.2) Pub Date : 2024-03-12 Tong Zhou, Tong Guo, Chao Dang, Michael Beer
A Bayesian reinforcement learning reliability method that combines Bayesian inference for the failure probability estimation and reinforcement learning-guided sequential experimental design is proposed. The reliability-oriented sequential experimental design is framed as a finite-horizon Markov decision process (MDP), with the associated utility function defined by a measure of epistemic uncertainty
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A robust optimization framework for design of robotic system with kinematic and dynamic criteria Comput. Methods Appl. Mech. Eng. (IF 7.2) Pub Date : 2024-03-12 Shuoshuo Shen, Dequan Zhang, Xu Han, Chao Jiang, Qing Li
Industrial robot, as one class of digitalized intelligent equipment, plays a significant role in enhancing production efficiency and quality through implementing desired kinematic precision and reliable performance for modern high-tech industries. This study proposes a robust optimization framework to account for the kinematic and dynamic uncertainties in industrial robotic systems. The design objective
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Mixed mode fatigue crack growth and fatigue threshold analysis in polyurethane adhesives at elevated temperatures Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-12 M. Ribas, A. Akhavan-Safar, R.J.C. Carbas, E.A.S. Marques, S. Wenig, L.F.M. da Silva
The paper investigates mixed-mode fatigue crack growth in ductile polyurethane adhesives, emphasizing mode decoupling to distinguish the impact of each loading mode component on crack propagation. It also explores the temperature sensitivity of fatigue crack growth rates for each loading mode. Individual scrutiny of the role of each loading mode in tests is accompanied by an analysis of fatigue fracture
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Configurational force method enables fracture assessment in soft materials J. Mech. Phys. Solids (IF 5.3) Pub Date : 2024-03-12 Miguel Angel Moreno-Mateos, Paul Steinmann
Configurational mechanics offers a framework for quantifying the tendency of defects to alter the material configuration. When applied to fracture mechanics, configurational forces can be used to quantify the propensity of cracks to propagate. An alternative, well-established approach involves analytical solutions for crack tip displacement fields. However, these solutions typically apply to a limited
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A novel conceptual design approach for autonomous underwater helicopter based on multidisciplinary collaborative optimization Eng. Appl. Comput. Fluid Mech. (IF 6.1) Pub Date : 2024-03-11 Yuan-Jie Chen, Haocai Huang
Autonomous underwater helicopters (AUHs) are complex electromechanical systems consisting of multiple interconnected sub-disciplines, posing a significant challenge for traditional sequential desig...
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Topology optimization for rigid and compliant hybrid mechanisms Comput. Methods Appl. Mech. Eng. (IF 7.2) Pub Date : 2024-03-11 Shuhao Xia, Tao Gong, Bicheng Chen, Xianmin Zhang, Nianfeng Wang
This paper proposes a topology optimization method integrating the variable trajectory constraints to design rigid and compliant hybrid mechanisms. The variable trajectory constraints are distributed in the design domain and are uniformly modeled by nonlinear spring model. Each of the variable trajectory constraints has an active or inactive state and different states map various mechanical properties
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Numerical modeling of ferroelectric materials in the presence of flexoelectricity Comput. Methods Appl. Mech. Eng. (IF 7.2) Pub Date : 2024-03-11 Prince Henry Serrao, Sergey Kozinov
Higher-order two-way electromechanical coupling between strain gradients and electric field, known as flexoelectricity, has a strong influence on the micro- and nanoelectromechanical devices characterization as it is highly pronounced on smaller scales. Flexoelectricity in dielectrics and piezoelectrics has been well analyzed recently, however, its influence on the behavior of ferroelectric materials
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Study on thermal fatigue stability in microstructure and mechanical property of Fe35Ni35Cr20Mn10 high-entropy alloy wire and pearlite wire at high/medium temperature environment Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-11 Mengchuan Shi, Xinghui Pan, Dan Wu, Hengcheng Liao, Guangjing Li, Hongfang Liu, Weijun Zhu
Thermal fatigue stability in microstructure and strength of Fe35Ni35Cr20Mn10 high-entropy alloy (HEA) wire and pearlite wire at 400–700 °C with low cycles was studied. The pearlite wire has a poor stability in microstructure and strength, significantly changing with the temperature. HEA wire has an excellent thermal fatigue stability. After the thermal fatigue at 400 °C and 500 °C, the microstructure
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Practical fatigue strength diagrams for compression springs based on the FKM-Guideline “Analytic Strength Assessment for Springs“ Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-11 Martin Petrich, Ulf Kletzin
Metal springs are used extensively in technical products. The mathematical relationships and Goodman diagrams contained in the DIN EN 13906–1 standard form the essential basis for the design and calculation of cylindrical helical compression springs. They are used not only nationally, but internationally in the spring industry and by spring users. However, the diagrams are more than 50 years old and
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Improving the fatigue property of 316L stainless steel through direct energy deposition technology Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-11 Kang Xu, Sen Huang, Mingxiong Yu, Yu Xia, Bochuan Li, Lizhong Mao, Hongsheng Tian, Zhongwei Xu, Geping Xiong, Lipeng Xiao, Wenping Wang
In this study, to improve the fatigue strength of coarse grain 316L stainless steel, the hard 17-4ph martensitic stainless steel was deposited on the surface of hot rolled 316L based on direct energy deposition (DED) additive manufacturing technology. The 17-4ph deposition and 316L substrate are well connected without any cracking phenomenon which lays the foundation of good mechanical properties.
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Mechanobiological tortuosity of blood vessels with stress-modulated growth and remodeling J. Mech. Phys. Solids (IF 5.3) Pub Date : 2024-03-11 Wei-Zhi Huang, Bo Li, Xi-Qiao Feng
The stability of blood vessels is essential for maintaining their functions, while severe blood vessel tortuosity leads to various clinical complications. The growth and remodeling of blood vessels, which are regulated by mechanical and biochemical cues, cause residual stresses that affect vessel stability. In this paper, we combine theory and simulations to study the mechanobiological behavior of
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Thermal cracking: Clarifying the effects of phases, voids and grains through characterisation and crystal plasticity modelling J. Mech. Phys. Solids (IF 5.3) Pub Date : 2024-03-11 Wei Wang, Ruiqiang Zhang, Amir A Shirzadi, Daniel S Balint, Lee Aucott, Jun Jiang
Thermally-induced cracking typically occurs during the cooling stage of various manufacturing processes, and is commonly seen in multiphase or the joints of dissimilar materials due to mismatch in their thermo-mechanical properties, such as thermal expansion, elastic-plastic deformation and, in some cases, phase transformation. However, the underlying cracking mechanism associated with local microstructure
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Peridynamic analysis of thermal behaviour of PCM composites for heat storage Comput. Methods Appl. Mech. Eng. (IF 7.2) Pub Date : 2024-03-10 Petr Nikolaev, Andrey P. Jivkov, Marius Fifre, Majid Sedighi
One possibility to utilize excess energy from electricity generation or other industrial processes is to use thermal energy storage systems based on phase change materials (PCM). These systems can accumulate and release significant amounts of heat energy during the phase transitions. The volume and properties of PCM undergo rapid changes during the transitions, creating strong physical non-linearities
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Prediction of microstructural-dependent mechanical properties, progressive damage, and stress distribution from X-ray computed tomography scans using a deep learning workflow Comput. Methods Appl. Mech. Eng. (IF 7.2) Pub Date : 2024-03-10 Mohammad Rezasefat, Haoyang Li, James D. Hogan
Creating computationally efficient models that link processing methods, material structures, and properties is essential for the development of new materials. Translating microstructural details to macro-level mechanical properties often proves to be an arduous challenge. This paper introduces a novel deep learning-based framework to predict 3D material stress fields, mechanical behavior, and progressive
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Fatigue prediction criteria for rubber antivibration design with temperature effects Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-09 Robert Keqi Luo
It is desirable to obtain a fatigue criterion that can be correlated to different rubbers with both mechanical and temperature effects. In this paper, we investigated the possibility to correlate the S-N base function to temperature environments. The published experimental data consisting of temperatures ranging from 23-90 ° C for rubber samples with 50 and 45 Shore hardness were used to validate the
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Low-cycle fatigue behaviour of magnesium alloy thick plate joints fabricated via differential double-shoulder friction stir welding Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-09 Qiang Liu, Wen Wang, Ting Zhang, Qianzhi Ma, Peng Han, Dingrui Ni, Ke Qiao, Kuaishe Wang
Magnesium (Mg) alloy thick plates welded by friction stir welding (FSW) often exhibit poor formability and uneven microstructures, leading to a significant deterioration in the mechanical properties. In this work, AZ31 Mg alloy plates with a thickness of 20 mm were successfully welded by differential double-shoulder friction stir welding (DDS-FSW). The low-cycle fatigue response behaviour was characterised
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Numerical simulation investigation of the mechanism of lacquer curtain formation in curtain coating Eng. Appl. Comput. Fluid Mech. (IF 6.1) Pub Date : 2024-03-06 Jie-min Zhan, Kai Lin, Yi-hua Li, Wen-qing Hu
To study the key factors on integrated curtain formation and breakup in curtain coating production process, we used the numerical simulation method to analyze the various stages of the curtains fro...
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Modelling short crack growth under creep-fatigue interaction for different dwell times Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-08 Chengchong Hu, Lianyong Xu, Lei Zhao, Yongdian Han, Cong Li
The creep-fatigue interaction (CFI) short crack growth behavior of 316H steel under different dwell times at 550℃ was investigated in this work. The dwell time effect of the CFI short crack growth behavior is analyzed systematically, the results revealed that compared to the long cracks, the short cracks is more sensitive to the creep damage effect during the dwell period. Meanwhile, a CTOD-based CFI
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Multiaxial low cycle fatigue behavior and life prediction of wire arc additive manufactured 308L stainless steel Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-08 Yajing Li, Shuyao Zhang, Wanqi Yu, Bo Li, Fuzhen Xuan, Xu Chen
Wire arc additive manufacturing (WAAM) is a technique that has gained popularity in various industrial sectors due to its high productivity and flexibility. However, the comprehension of cyclic deformation and fatigue behaviors in WAAM austenitic stainless steel (SS), particularly under complex multiaxial loading conditions, is much less advanced compared to conventional manufacturing methods. This
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Mechanical impairment characteristics and a novel constitutive model for rocks subjected to uniaxial loading process Int. J. Damage Mech. (IF 4.2) Pub Date : 2024-03-08 Kai Chen, Roberto Cudmani, Andres Alfonso Pena Olarte
The study of constitutive relationship and damage degradation is crucial in solving the stability challenges faced in the rock engineering. In this work, the stress-strain relationships of different type of rocks subjected to uniaxial loading processes are investigated in details. Experimental results demonstrate measurements, such as uniaxial compressive strength (UCS), tangent deformation modulus
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An efficient and easy-to-implement recovery-based a posteriori error estimator for isogeometric analysis of the Stokes equation Comput. Methods Appl. Mech. Eng. (IF 7.2) Pub Date : 2024-03-07 Abdullah Abdulhaque, Trond Kvamsdal, Kjetil André Johannessen, Mukesh Kumar, Arne Morten Kvarving
In this article, we present an recovery-based a posteriori error estimator for adaptive isogeometric analysis (IGA) of the Stokes equation, which is straightforward to implement. The increased regularity of splines in IGA versus Lagrange polynomials used in the classical finite element method plays a significant role for the success of the presented recovery technique. We consider LR B-splines (Johannessen
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Multi-scale identification of composite using modified constitutive relation error: Formulation and numerical study Comput. Methods Appl. Mech. Eng. (IF 7.2) Pub Date : 2024-03-07 Shaojuan Huang, Pierre Feissel, Pierre Villon
This paper investigates a new multi-scale approach, in which only one scale measurement is used to simultaneously identify the micro heterogeneous properties of composite at the measurement level and the macro homogeneous ones at the specimen level. Since the lack of information outside the measurement zone prevents identifying properties in this area, many multi-scale identification methods require
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Modeling the dynamic fracture of concrete — A robust, efficient, and accurate mesoscale description Comput. Methods Appl. Mech. Eng. (IF 7.2) Pub Date : 2024-03-07 Christoph Grunwald, Werner Riedel, Martin Sauer, Alexander Stolz, Stefan Hiermaier
Dynamic loading of concrete often leads to excessive cracking and fragmentation. Since these processes are massively influenced by the underlying heterogeneity of the material, discrete modeling of the lower-scale features strongly improves the simulation results. At the same time, the computational effort is greatly increased. We therefore propose here a mesomechanical simulation approach which is
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Mechanism of mean stress sensitivity in Ti-6Al-4V under different stress ratios in high cycle fatigue Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-07 Weiqian Chi, Wenjing Wang, Zeyuan Hou, Min Zhang
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An automated measurement method for the fatigue crack propagation based on decorrelated digital image correlation Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-07 Derui Li, Bin Cheng, Linze Shi, Sheng Xiang, Qibin Zhao
Measurements of fatigue crack propagation are crucial for fatigue tests. Nowadays, fatigue tests still necessitate experimenters to manually observe and document the propagation of fatigue cracks, a process that proves to be extremely time-consuming and labor-intensive. This study introduces a novel approach to fatigue crack measurement by employing the decorrelated digital image correlation (DIC)
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A new probabilistic control volume scheme to interpret specimen size effect on fatigue life of additively manufactured titanium alloys Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-07 Zhi-Qiang Tao, Zibiao Wang, Xiangnan Pan, Tianxiong Su, Xu Long, Bowen Liu, Qingxiao Tang, Xuechong Ren, Chengqi Sun, Guian Qian, Youshi Hong
The effect of specimen size on the fatigue performance of additively manufactured Ti-6Al-4V is investigated in this paper. The fatigue tests of Ti-6Al-4V specimens made by laser powder bed fusion were conducted via ultrasonic axial cycling up to very-high-cycle regime with stress ratio = –1. The - data of five group specimens show an evident size effect, that is, with the increase of specimen size
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An enhanced stress field intensity approach for fatigue life assessment combining notch and size effect Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-07 Zinan Wang, Xiangwei Kong, Liyang Xie, Ningxiang Wu, Cheng Zhen, Jianyi Gu
The notch characteristics of engineering components significantly impact their fatigue lives. Accurately analyzing the notch effect and size effect is of great significance for structural integrity evaluation, which provides insights into the extent of fatigue failure in engineering structures. In this paper, a new method is proposed for determining the fatigue failure region based on actual elastic–plastic
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Retardation mechanisms and modeling of fatigue crack growth of a high-strength steel after single overload Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-07 Youlin Li, Lu Ke, Chuanxi Li, Peng Feng, Zheng Feng, Mingdong Qiu
This study investigated the retardation mechanisms and modeling methodology for the fatigue crack growth (FCG) of a high-strength Q500qE steel after a single overload. Different stress ratios ( = 0.1, 0.3, and 0.5) and overload ratios (OLR = 1.5, 2.0, and 2.5) were considered as key parameters. The digital image correlation (DIC) testing technique was used to capture the deformation at the crack tip
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Finite element analysis of fretting fatigue properties of GH4169 superalloy considering the surface treatments Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-07 Jingchen Wang, Lu Yao, Xiangyuan Zheng, Kunhao Xu, ShaSha Qi, Xufen Xiao, Xu Wang, Yukui Gao
In the present work, the fretting fatigue properties of GH4169 superalloy at 650℃ were investigated through numerical simulation considering the influences of the surface treatments. As a detrimental phenomenon, fretting fatigue involves fatigue and wear simultaneously, where the coefficient of friction and residual stress fields induced by the surface coating or modification techniques may affect
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Enhancing nonlinear solvers for the Navier–Stokes equations with continuous (noisy) data assimilation Comput. Methods Appl. Mech. Eng. (IF 7.2) Pub Date : 2024-03-06 Bosco García-Archilla, Xuejian Li, Julia Novo, Leo G. Rebholz
We consider nonlinear solvers for the incompressible, steady (or at a fixed time step for unsteady) Navier–Stokes equations in the setting where partial measurement data of the solution is available. The measurement data is incorporated/assimilated into the solution through a nudging term addition to the Picard iteration that penalized the difference between the coarse mesh interpolants of the true
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Thermo-mechanical fatigue behavior and microstructure evolution of 4Cr5Mo3V hot work die steel Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-06 Hailing Chen, Shengci Li, Yupeng Ren, Xiaodong Hou, Haibo Yang, Shuyan Zhang
Thermo-mechanical fatigue (TMF) testing was used to study the fatigue behavior of 4Cr5Mo3V hot work die steel to reflect the in-service conditions. The synergistic effect of cyclic temperature and mechanical load was investigated using a strain-controlled method. Our results confirmed that the cyclic softening degree of 4Cr5Mo3V steel increased as the mechanical strain amplitude get bigger, leading
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Fatigue crack propagation characteristics of aluminum/steel laser-metal inert gas fusion-brazed joints in different micro-zones Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-06 Yunqi Liu, Yuanxing Li, Hui Chen, Zongtao Zhu
Research on fatigue damage of aluminum/steel dissimilar joints is critical to ensure the reliability of multi-material lightweight structures. In this study, the fatigue crack propagation (FCP) characteristics of the interface, weld, and heat-affected zone (HAZ) of aluminum/steel laser-metal inert gas (MIG) fusion-brazed joints were investigated. Additionally, the influencing role of the microstructure
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The subdivision-based IGA-EIEQ numerical scheme for the Navier–Stokes equations coupled with Cahn–Hilliard phase-field model of two-phase incompressible flow on complex curved surfaces Comput. Methods Appl. Mech. Eng. (IF 7.2) Pub Date : 2024-03-05 Qing Pan, Yunqing Huang, Timon Rabczuk, Xiaofeng Yang
We develop an accurate and robust numerical scheme for solving the incompressible hydrodynamically coupled Cahn–Hilliard system of the two-phase fluid flow system on complex surfaces. Our algorithm leverages a number of efficient techniques, including the subdivision-based isogeometric analysis (IGA) method for spatial discretization, the explicit Invariant Energy Quadratization (EIEQ) method for linearizing
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A Phase-Field Discrete Element Method to study chemo-mechanical coupling in granular materials Comput. Methods Appl. Mech. Eng. (IF 7.2) Pub Date : 2024-03-05 Alexandre Sac-Morane, Manolis Veveakis, Hadrien Rattez
This paper presents an extension of the discrete element method using a phase-field formulation to incorporate grain shape and its evolution. The introduction of a phase variable enables an effective representation of grain geometry and facilitates the application of physical laws, such as chemo-mechanical couplings, for modeling shape changes. These physical laws are solved numerically using the finite
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Arbitrary polygon-based CSFEM-PFCZM for quasi-brittle fracture of concrete Comput. Methods Appl. Mech. Eng. (IF 7.2) Pub Date : 2024-03-05 Yu-jie Huang, Zhi-shan Zheng, Feng Yao, Chen Zeng, Hui Zhang, Sundararajan Natarajan, Shi-lang Xu
In recent years, engineering and research communities have shown a growing interest in polygon elements due to their adaptability to complex geometries. However, their applicability for investigating the quasi-brittle damage and fracture of concrete structures is still an open question. This work thus develops a numerical framework to integrate the phase-field regularized cohesive zone model (PFCZM)
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A nested non-invasive stochastic isogeometric method for the deformation of porous functionally graded material plates with high-dimensional material uncertainties Comput. Methods Appl. Mech. Eng. (IF 7.2) Pub Date : 2024-03-05 Junli Guo, Yahui Zhang
The stochastic isogeometric analysis (SIGA) based on random geometric methods plays a crucial role in structural random analysis. However, existing intrusive SIGA methods suffer from limitations of low applicability or efficiency. On the other hand, current material uncertainties are mostly limited to low dimensions and often ignore spatial correlations. Therefore, we propose an efficient and adaptive
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Mixed-Mode small fatigue crack growth rates and modeling in additively manufactured metals Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-05 Matthew J. Markham, Ali Fatemi, Nam Phan
The fatigue life of metals can be generally divided into three stages: crack nucleation, small crack growth up to about 2 mm, and large crack growth up to fracture. In additively manufactured metals, where defects up to 100 μm can be present from the time of production, crack nucleation life may be negligible. Therefore, the characterization of small crack growth behavior in these metals is important
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Retraction notice to “Reliability analysis of fatigue crack growth for rail steel under variable amplitude service loading conditions and wear” [Int. J. Fatigue 152 (2021) 106450] Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-05 Reza Masoudi Nejad, Zhiliang Liu, Wenchen Ma, Filippo Berto
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Damage evolution analysis of concrete based on multi-feature acoustic emission and Gaussian mixture model clustering Int. J. Damage Mech. (IF 4.2) Pub Date : 2024-03-05 Bo Yu, Jian Liang, Jiann-Wen Woody Ju
In this work, a novel method for damage evolution analysis of concrete under uniaxial compression is proposed based on the multi-feature acoustic emission (AE) and the Gaussian mixture model (GMM) clustering. The hierarchical clustering algorithm is adopted to select optimal AE parameters, while multiple features of these parameters are generated through the principal component analysis (PCA). Then
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Multiaxial fatigue behavior and crack orientation prediction for steel and cast iron Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-04 Jan Kraft, Alexander Linn, Michael Wächter, Alfons Esderts, Michael Vormwald
This study investigates multiaxial fatigue behavior of ductile construction steel S355 and cast iron EN-GJS-500-14. Fatigue lives and crack initiation orientations are measured. Three critical plane models are evaluated for predicting fatigue life and crack initiation angles. While all models achieve decent accuracy in predicting fatigue life, crack initiation angle predictions are less satisfactory
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Corrosion fatigue behaviour of Q690D high-strength steel considering the effect of coupling Int. J. Fatigue (IF 6.0) Pub Date : 2024-03-04 Heng Liu, Caiwang Zan, Liang Zong
During the service period of steel structures, the condition of suffering from environmental corrosions and fatigue loadings simultaneously widely exists. In this article, focusing on the corrosion fatigue behaviour of Q690D high-strength steel with consideration of the coupling effect, experimental research was conducted and the coupling effect was analysed. Corrosion fatigue coupling tests were performed
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The dominating dimensionless numbers of an elastic-plastic thin plate under dynamic loading J. Mech. Phys. Solids (IF 5.3) Pub Date : 2024-03-04 Xiaorun Huang, Yongjie Feng, Mu Wang, Xinming Qiu
The response of an elastic-plastic thin plate under dynamic loading cannot be solved theoretically since both geometrical and material nonlinearities are involved and also highly coupled. Obviously, the response will be affected by material properties, geometries, and loads, whose effects are usually studied separately. In order to avoid repeated investigations and save costs, identifying the combined
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Two-phase flow investigation of sewage pumps with different tip clearance via computational fluid dynamics and multi-factor ANOVA Eng. Appl. Comput. Fluid Mech. (IF 6.1) Pub Date : 2024-03-01 Yang Yang, Hui Wang, Qixiang Hu, Leilei Ji, Zhaoming He, Weidong Shi, Xiangyu Song, Ling Zhou
Sewage pumps are widely utilized in various applications, including municipal wastewater treatment plants, industrial processes, and residential sewage systems. These pumps are specifically designe...
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Learning mesh motion techniques with application to fluid–structure interaction Comput. Methods Appl. Mech. Eng. (IF 7.2) Pub Date : 2024-03-02 Johannes Haubner, Ottar Hellan, Marius Zeinhofer, Miroslav Kuchta
Mesh degeneration is a bottleneck for fluid–structure interaction (FSI) simulations and for shape optimization via the method of mappings. In both cases, an appropriate mesh motion technique is required. The choice is typically based on heuristics, e.g., the solution operators of partial differential equations (PDE), such as the Laplace or biharmonic equation. Especially the latter, which shows good
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Isogeometric collocation for solving the biharmonic equation over planar multi-patch domains Comput. Methods Appl. Mech. Eng. (IF 7.2) Pub Date : 2024-03-02 Mario Kapl, Aljaž Kosmač, Vito Vitrih
We present an isogeometric collocation method for solving the biharmonic equation over planar bilinearly parameterized multi-patch domains. The developed approach is based on the use of the globally -smooth isogeometric spline space (Kapl and Vitrih, 2021) to approximate the solution of the considered partial differential equation, and proposes as collocation points two different choices, namely on