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An improved damage constitutive model for pre-heated rocks under uniaxial compression considering the initial compaction effect and residual strength Int. J. Damage Mech. (IF 4.0) Pub Date : 2024-08-22 Xunjian Hu, Dongdong Ma, Ni Xie, Qizhi Zhu, Haibo Hu, Xiaonan Gong
Enhancing our understanding of the damage evolution in pre-heated rock is essential for safer design practices. Accordingly, a mechanical damage variable that accurately depicts the initial damage recovery process was proposed. Subsequently, a damage constitutive model is developed based on the generalized equivalent strain principle, enabling the identification of the initial nonlinear characteristics
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Statistical damage constitutive model based on energy conversion for rocks Int. J. Damage Mech. (IF 4.0) Pub Date : 2024-08-22 Cheng Hongming, Yang Xiaobin, Lu Jie, Dong Chuanlong, Lan Yongqing
The nonlinearity of the constitutive relation for rocks becomes more prominent with a more complex physical-mechanical environment and mechanical behavior. The accurate establishment of the constitutive relation affects the determination of rock deformation and damage state from physical features. In this study, a novel statistical damage constitutive model for rocks is proposed based on quantified
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Fast implicit update schemes for Cahn–Hilliard-type gradient flow in the context of Fourier-spectral methods Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-17 A. Krischok, B. Yaraguntappa, M.-A. Keip
This work discusses a way of allowing fast implicit update schemes for the temporal discretization of phase-field models for gradient flow problems that employ Fourier-spectral methods for their spatial discretization. Through the repeated application of the Sherman–Morrison formula we provide a rule for approximations of the inverted tangent matrix of the corresponding Newton–Raphson method with a
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Computational investigation of the relationship between landslide-related conditions and resultant dam overtopping waves Eng. Appl. Comput. Fluid Mech. (IF 5.9) Pub Date : 2024-08-13 Yunfei Mao, Mingfu Guan
The landslide-induced overtopping waves on the dam possesses the potential to release significant energy, presenting a severe hazard to infrastructures and human lives downstream. To gain insight i...
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DHRDE: Dual-population hybrid update and RPR mechanism based differential evolutionary algorithm for engineering applications Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-16 Gang Hu, Changsheng Gong, Bin Shu, Zhiqi Xu, Guo Wei
In this paper, an enhanced differential evolution algorithm based on dual population hybrid update and random population replacement strategy (namely RPR mechanism) is proposed, which is called DHRDE. DHRDE algorithm involves three key improvements, first, the elite reverse population is constructed according to the original population before the update phase to uncover more potential areas to be searched
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Geometric Approaches to Lagrangian Averaging Annu. Rev. Fluid Mech. (IF 25.4) Pub Date : 2024-08-15 Andrew D. Gilbert, Jacques Vanneste
Lagrangian averaging theories, most notably the generalized Lagrangian mean (GLM) theory of Andrews and McIntyre, have been primarily developed in Euclidean space and Cartesian coordinates. We reinterpret these theories using a geometric, coordinate-free formulation. This gives central roles to the flow map, its decomposition into mean and perturbation maps, and the momentum 1-form dual to the velocity
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Numerical simulation of various flow regimes in water delivery systems Eng. Appl. Comput. Fluid Mech. (IF 5.9) Pub Date : 2024-08-13 YinYing Hu, Ling Zhou, YunJie Li, YanQing Lu, RuiLin Feng, QianXun Chen, ZiJian Xue
Transient flow frequently occurs in water delivery systems, including various flow regimes such as water hammer, free surface flow, and slug flow. Current models often oversimplify these phenomena ...
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Discontinuous Galerkin approximations of the heterodimer model for protein–protein interaction Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-14 Paola F. Antonietti, Francesca Bonizzoni, Mattia Corti, Agnese Dall’Olio
Mathematical models of protein–protein dynamics, such as the heterodimer model, play a crucial role in understanding many physical phenomena, e.g., the progression of some neurodegenerative diseases. This model is a system of two semilinear parabolic partial differential equations describing the evolution and mutual interaction of biological species. This article presents and analyzes a high-order
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A transfer learning physics-informed deep learning framework for modeling multiple solute dynamics in unsaturated soils Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-14 Hamza Kamil, Azzeddine Soulaïmani, Abdelaziz Beljadid
Modeling subsurface flow and transport phenomena is essential for addressing a wide range of challenges in engineering, hydrology, and ecology. The Richards equation is a cornerstone for simulating infiltration, and when coupled with advection–dispersion equations, it provides insights into solute transport. However, the complexity of this coupled model increases significantly when dealing with multiple
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Improving the streamflow prediction accuracy in sparse data regions: a fresh perspective on integrated hydrological-hydrodynamic and hybrid machine learning models Eng. Appl. Comput. Fluid Mech. (IF 5.9) Pub Date : 2024-08-13 Saeed Khorram, Nima Jehbez
Considering the differences and complex nonlinear relationships of the observational data, this research integrated the hydrological, hydrodynamic and time series models, including the SWAT+, MIKE2...
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Computationally-efficient locking-free isogeometric discretizations of geometrically nonlinear Kirchhoff–Love shells Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-13 Kyle Dakota Mathews, Hugo Casquero
Discretizations based on the Bubnov-Galerkin method and the isoparametric concept suffer from membrane locking when applied to Kirchhoff–Love shell formulations. Membrane locking causes not only smaller displacements than expected, but also large-amplitude spurious oscillations of the membrane forces. Continuous-assumed-strain (CAS) elements were originally introduced to remove membrane locking in
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Aerodynamics effects of rear-mounted porous plate in cylindrical flow at different Reynold numbers Eng. Appl. Comput. Fluid Mech. (IF 5.9) Pub Date : 2024-08-13 Shishang Zhang, Tanghong Liu, Xiaodong Chen, Ye Zhang, Zhiqiang Kong, Qian Yu, Hongkang Liu
This paper conducts simulations to analyze the flow control characteristics of cylindrical flow over porous plates in the subcritical regime, utilising large-eddy simulation (LES) coupled with the ...
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Isothermal and thermomechanical fatigue crack growth behavior and modelling of 316LN stainless steel with the superposition of HCF loading Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-13 Yiming Zheng, Bingbing Li, Fang Wang, Caijun Xu, Kang Wang, Xu Chen
This work comparatively investigates the effect of superposition of high-cycle fatigue (HCF) loading on the crack growth behavior of 316LN stainless steel in isothermal fatigue (IF) and thermomechanical fatigue (TMF) tests. Results show that a deflection of the crack growth rate is observed in the tests without HCF loading. The superposition of HCF loading leads to a marked increase of crack growth
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Phase field modeling of underloads induced fatigue crack acceleration Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-13 Hao Wang, Tong Shi, Qiyu Huang, Xiaoben Liu
This study proposes a novel methodology to model the fatigue crack growth acceleration under underloads using a phase field fracture framework. In this model, fatigue crack growth is characterized by the degradation of fracture toughness, with an emphasis on employing a representative loading strategy instead of explicit cyclic loading, thus accelerating simulations of high-cycle fatigue. The model
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Nonlocal multiaxial fatigue model based on artificial neural networks for predicting fretting fatigue life of dovetail joints Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-13 Wang Zhao, Sihai Luo, Xiaoqing Liang, Zhicong Pang, Jingdong Song, Zhenyang Cao, Fang Cheng, Weixin Fan, Weifeng He, Ronghui Cheng
Fretting fatigue of dovetail joints is of paramount importance for ensuring equipment safety, where the swift and precise estimation of their fatigue life is crucial. In this study, we present a nonlocal multiaxial fatigue model based on artificial neural networks (ANN) to tackle these challenges. Initially, the damage parameters were calculated using critical plane approaches (CPA) and theory of critical
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A fully explicit isogeometric collocation formulation for the dynamics of geometrically exact beams Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-12 Giulio Ferri, Josef Kiendl, Alessandro Reali, Enzo Marino
We present a fully explicit dynamic formulation for geometrically exact shear-deformable beams. The starting point of this work is an existing isogeometric collocation (IGA-C) formulation which is explicit in the strict sense of the time integration algorithm, but still requires a system matrix inversion due to the use of a consistent mass matrix. Moreover, in that work, the efficiency was also limited
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A stabilization-free hybrid virtual element formulation for the accurate analysis of 2D elasto-plastic problems Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-12 F.S. Liguori, A. Madeo, S. Marfia, G. Garcea, E. Sacco
A plasticity formulation for the Hybrid Virtual Element Method (HVEM) is presented. The main features include the use of an energy norm for the VE projection, a high-order divergence-free interpolation for stresses and a piecewise constant interpolation for plastic multipliers within element subdomains. The HVEM does not require any stabilization term, unlike classical VEM formulations which are affected
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Deep material network for thermal conductivity problems: Application to woven composites Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-12 Dongil Shin, Peter Jefferson Creveling, Scott Alan Roberts, Rémi Dingreville
The thermal conductivity of materials dictates their functionality and reliability, especially for materials with complex microstructural topologies, such as woven composites. In this paper, we develop a physics-informed machine-learning architecture built specifically for solving thermal conductivity problems. Originally developed for mechanical problems, we extend and develop a deep material network
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Maximum energy dissipation-based incremental approach for structural analyses involving discrete fracture propagation in quasi-brittle materials Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-12 Saeed Mohammadzadeh Chianeh, Daniel Dias-da-Costa
A maximum energy dissipation-based incremental approach (MEDIA) is proposed to overcome limit points, e.g. strong snap-backs, in the fracture analysis of quasi-brittle materials. An optimisation step is applied using an expression proposed to compute the change of dissipated energy within the discretised body when moving from one state of equilibrium to another. This expression is developed at the
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Effect of peening with fine iron-sulfide particles on the rotating bending fatigue properties of low alloy steel and formation of iron-sulfide layer Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-12 Shotaro Noguchi, Kiyotaka Mitake, Kosuke Doi, Hisashi Harada, Shoichi Kikuchi
Low alloy steels were subjected to peening with fine iron sulfide particles (FeS-peening) under ambient conditions to transfer a layer of such particles, which can improve seizure resistance and sliding properties, and thus enhance the fatigue characteristics of the steel. This process was performed without the use of aqueous NaSO and the specimens were assessed using electron probe microanalysis and
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Very high cycle fatigue characteristics of laser beam powder bed fused AlSi10Mg: A systematic evaluation of part geometry Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-12 Kamin Tahmasbi, Muztahid Muhammad, Maryam Avateffazeli, Mohammadreza Yaghoobi, Andrea Tridello, Davide S. Paolino, Shuai Shao, Nima Shamsaei, Meysam Haghshenas
This study explores the influence of geometry and part size on defect distribution, melt pool size, and mechanical characteristics in laser beam powder bed fused (LB-PBF) AlSi10Mg. Five distinct geometries—hourglass, small rod, small block, large block, and large rod—were fabricated under identical process parameters. Fully reversed ultrasonic fatigue testing, operating at a frequency of 20 kHz, was
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On the cyclic elastoplastic shakedown behavior of an auxetic metamaterial: An experimental, numerical, and analytical study J. Mech. Phys. Solids (IF 5.0) Pub Date : 2024-08-12 Shen Wang, Michael Peigney, Natasha Vermaak
This article presents the first experimental, numerical, and analytical study of the elastoplastic shakedown response of an auxetic metamaterial structure that elucidates interactions between auxeticity and maximum shakedown loading capacity. The study aims to determine the safe elastoplastic shakedown limit of perforated auxetic aluminum sheet structures (AA5083-TO) with fixed void fraction (16.4%)
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Non-similar analysis of two-phase hybrid nano-fluid flow with Cattaneo-Christov heat flux model: a computational study Eng. Appl. Comput. Fluid Mech. (IF 5.9) Pub Date : 2024-08-06 Faisal Shah, D. Zhang, G. Linlin
The purpose of this research elaborates the behaviour of the two-phase hybrid nano-fluid flow of viscous fluid through the stretching sheet. Impacts of heat transfer, for MHD two-dimensional steady...
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Evaluation of scale invariance in fatigue crack growth in metallic materials Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-10 V. Norman, M. Ahlqvist, T. Mattsson
The length-scale dependence of fatigue crack growth is evaluated for a set of metallic materials, namely titanium Ti-6Al-4V, ductile iron EN-GJS-500-7 and tool steel AISI H13, by performing fatigue crack growth tests on geometrically similar compact C(T) specimens of different sizes. With references to length-scale-invariant variables, notably the crack growth rate normalised by the specimen width
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Experimental investigation on the effect of forced assembly on fatigue behavior of single-lap, countersunk composite bolted joints Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-10 Hao Qu, Dongsheng Li, Yunong Zhai, Ende Ge, Wei Xi, Chenhao Ji
Forced assembly is a common countermeasure for eliminating the interface gap during composite airframe assembly, which modifies the bolt-hole bearing behavior and brings failure risks. In this study, an experimental investigation on the effect of forced assembly on the fatigue behavior of single-lap, countersunk composite bolted joints is presented. The hole elongation and dynamic stiffness are obtained
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Effects of yttrium on microstructure and low cycle fatigue properties of superalloy IN713C at high temperature Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-10 Qingling Li, Huarui Zhang, Ying Cheng, Yanyun Sun, Fuwei Wang, Zichen Zha, Junpin Lin, Hu Zhang
In order to improve the high temperature and low cycle fatigue performance of the IN713C alloy, trace amounts of yttrium (Y) element were added to such an alloy. The effect of Y on the microstructure and fatigue performance under push-pull loading condition of the IN713C alloy at 650 °C was investigated, and the fracture mechanisms of the IN713C alloy with different Y additions at strain amplitudes
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Physics-informed discretization-independent deep compositional operator network Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-09 Weiheng Zhong, Hadi Meidani
Solving parametric Partial Differential Equations (PDEs) for a broad range of parameters is a critical challenge in scientific computing. To this end, neural operators, which predicts the PDE solution with variable PDE parameter inputs, have been successfully used. However, the training of neural operators typically demands large training datasets, the acquisition of which can be prohibitively expensive
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A critical review/look at “Optimal implicit single-step time integration methods with equivalence to the second-order-type linear multistep methods for structural dynamics: Accuracy analysis based on an analytical framework” Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-09 Kumar K. Tamma, Yazhou Wang, Dean Maxam
A critical look and review of the so-called generalized single-step time integration method by Zhang (, 418(2024), 116503) is proved and demonstrated to be not new, but identical to and within the existing GS4-II computational framework. The following are addressed: (1) Firstly, it is claimed that 16 parameters were introduced (somewhat misleading as evident in what follows) to obtain a more generalized
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Two and three dimensional [formula omitted]-conforming finite element approximations without [formula omitted]-elements Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-09 Mark Ainsworth, Charles Parker
We develop a method to compute -conforming finite element approximations in both two and three space dimensions using readily available finite element spaces. This is accomplished by deriving a novel, equivalent mixed variational formulation involving spaces with at most -smoothness, so that conforming discretizations require at most -continuity. The method is demonstrated on arbitrary order -splines
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Effects of shot peening on improving high-temperature fretting fatigue performance of nickel-based single crystal superalloy tenon attachment Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-09 Lu Liu, Shouyi Sun, Huitao Chen, Tianyu Yuan, Jie Li, Yuxin Huo, Lei Li
In order to reveal the shot peening (SP) strengthening mechanism on the high-temperature fretting fatigue performance of nickel-based single crystal (NBSC) tenon attachment, fretting fatigue tests under three load conditions were carried out at 600 ℃. The results showed that the fretting fatigue life of SP NBSC tenon attachment could be increased to 357.53 % of that of non-SP NBSC tenon attachment
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SeAr PC: Sensitivity enhanced arbitrary Polynomial Chaos Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-08 Nick Pepper, Francesco Montomoli, Kyriakos Kantarakias
This paper presents a method for performing Uncertainty Quantification in high-dimensional uncertain spaces by combining arbitrary polynomial chaos with a recently proposed scheme for sensitivity enhancement (Kantarakias and Papadakis, 2023). Including available sensitivity information offers a way to mitigate the in Polynomial Chaos Expansions (PCEs). Coupling the sensitivity enhancement to arbitrary
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Interpretable physics-encoded finite element network to handle concentration features and multi-material heterogeneity in hyperelasticity Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-08 Xi Wang, Zhen-Yu Yin
Physics-informed neural networks (PINNs) have recently prevailed as differentiable solvers that unify forward and inverse analysis in the same formulation. However, PINNs have quite limited caliber when dealing with concentration features and discontinuous multi-material heterogeneity, hindering its application when labeled data is missing. We propose a novel physics-encoded finite element network
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Multistep asymptotic pre-training strategy based on PINNs for solving steep boundary singular perturbation problems Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-08 Fujun Cao, Fei Gao, Dongfang Yuan, Junmin Liu
The singularly perturbed problem is characterized by the presence of narrow boundary layers, which poses challenges for traditional numerical methods due to complexity and high costs. The contemporary deep learning physics-informed neural networks (PINNs) suffer from accuracy issues while learning initial conditions, fail to capture the sharp gradient behaviors, and provide inadequate approximations
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Exploiting interfacial instability during peeling a flexible plate from elastic films J. Mech. Phys. Solids (IF 5.0) Pub Date : 2024-08-08 Jinghao Shen, Zhengxing He, Huan Chen, Yuehua Yang, Hongyuan Jiang
Adhesive interactions between soft materials are prevalent in both biological systems and various engineering applications, including soft robots, flexible electronics, and antifouling coatings. Many studies have demonstrated that cavitation and fingering instabilities emerge at the adhesive interface between rigid objects and soft films, owing to the geometric attributes of the contact region. However
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Conservative immersed-type algorithm with a Cartesian grid-based smoothed finite element method for the 2D fluid-structure interaction Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-07 S.H. Huo, Y. Hong, G. Wang, C. Jiang, G.R. Liu, Z.Q. Li
The Cartesian grid, which is highly popular in Computational Fluid Dynamics (CFD), has the characteristics of high mesh quality and easy generation. However, due to the limit of shape functions, the Cartesian grid with hanging nodes (CGHN) was rarely used in finite element method based CFD algorithm. Based on the framework of the immersed boundary method, a smoothed finite element method based on CGHN
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Topology optimization for hybrid additive-subtractive manufacturing incorporating dynamic process planning Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-07 Shuzhi Xu, Jikai Liu, Kentaro Yaji, Lin Lu
Hybrid additive–subtractive manufacturing (HASM) is a revolutionary technique that, the interplay between additive and subtractive processes within an integrated machine tool allows for the fabrication of traditionally challenging complex geometries with excellent quality. However, part design for hybrid manufacturing has mostly been done by experts with rare support from computational design algorithms
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A mean-strain estimate for plastic particles intended for distinct-particle simulations at high relative density Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-07 Göran Frenning
The kinematics of polydisperse granular materials comprised of overlapping spheres is carefully analysed. A single-particle strain estimate is developed that summaries the deformation experienced by each particle in terms of a mean deformation gradient. This strain estimate accounts for material displaced at interparticle contacts as well as a compensatory motion of the free particle surface. Forces
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Efficient AMG reduction-based preconditioners for structural mechanics Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-07 Àdel Alsalti-Baldellou, Andrea Franceschini, Gianluca Mazzucco, Carlo Janna
Structural problems play a critical role in many areas of science and engineering. Their efficient and accurate solution is essential for designing and optimising civil engineering, aerospace, and materials science applications, to name a few. When appropriately tuned, Algebraic Multigrid (AMG) methods exhibit a convergence that is independent of the problem size, making them the preferred option for
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Dynamic behaviour and energy dissipation of offline air pockets in transient pipe flows Eng. Appl. Comput. Fluid Mech. (IF 5.9) Pub Date : 2024-08-07 Yun-Jie Li, Ling Zhou, Zhao Li, Tong-Chuan Che, Pedro Jose Lee, Yan-Qing Lu, Yin-Ying Hu
The traditional one-dimensional (1D) model often fails to accurately predict the dynamic pressure response of large offline air pockets during transients, due to a lack of comprehensive understandi...
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Third medium finite element contact formulation for pneumatically actuated systems Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-06 Ondřej Faltus, Martin Horák, Martin Doškář, Ondřej Rokoš
Active mechanical metamaterials are artificially engineered microstructures that can be externally controlled to exhibit novel and switchable mechanical behavior on the macroscopic scale. Pneumatically actuated variants of these metamaterials can then change their mechanical, acoustic, or other types of effective behavior in response to applied pressure with possible applications ranging from soft
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FSGe: A fast and strongly-coupled 3D fluid–solid-growth interaction method Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-06 Martin R. Pfaller, Marcos Latorre, Erica L. Schwarz, Fannie M. Gerosa, Jason M. Szafron, Jay D. Humphrey, Alison L. Marsden
Equilibrated fluid–solid-growth (FSGe) is a fast, open source, three-dimensional (3D) computational platform for simulating interactions between instantaneous hemodynamics and long-term vessel wall adaptation through mechanobiologically equilibrated growth and remodeling (G&R). Such models can capture evolving geometry, composition, and material properties in health and disease and following clinical
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A high-order conservative cut finite element method for problems in time-dependent domains Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-06 Sebastian Myrbäck, Sara Zahedi
A mass-conservative high-order unfitted finite element method for convection–diffusion equations in evolving domains is proposed. The space–time method presented in [P. Hansbo, M. G. Larson, S. Zahedi, Comput. Methods Appl. Mech. Engrg. 307 (2016)] is extended to naturally achieve mass conservation by utilizing Reynolds’ transport theorem. Furthermore, by partitioning the time-dependent domain into
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Stability and crack nucleation in variational phase-field models of fracture: Effects of length-scales and stress multi-axiality J. Mech. Phys. Solids (IF 5.0) Pub Date : 2024-08-06 Camilla Zolesi, Corrado Maurini
We investigate the conditions for crack nucleation in variational gradient damage models used as phase-field models of brittle and cohesive fracture. Viewing crack nucleation as a structural stability problem, we analyze how solutions with diffuse damage become unstable and bifurcate towards localized states, representing the smeared version of cracks. We consider gradient damage models with a linear
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Effect of model scale and airflow velocity on aerodynamic noise prediction for high-speed train leading car and bogie Eng. Appl. Comput. Fluid Mech. (IF 5.9) Pub Date : 2024-08-02 Deng Qin, Tian Li, Peng Zhou, Jiye Zhang
Predicting noise from the actual train model by numerical simulation and wind tunnel testing requires appropriate corrections based on reduced model scale and airflow velocity. This paper utilises ...
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A domain decomposition method employing displacement-only partitioned equations for quasi-static structural analysis Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-05 Seung-Hoon Kang, K.C. Park, José A. González, SangJoon Shin
The present study reports a family of iterative domain decomposition method for the static structural analysis, labeled as and its variants ( and ), all of which employ a recently developed Displacement-Only (DO) partitioned formulation (Park et al., 2023). The DO partitioned equation () consists of the applied force , the block-diagonal stiffness matrix () for each partition, the coupling projection
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A hyperreduced reduced basis element method for reduced-order modeling of component-based nonlinear systems Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-05 Mehran Ebrahimi, Masayuki Yano
We introduce a hyperreduced reduced basis element method for model reduction of parameterized, component-based systems in continuum mechanics governed by nonlinear partial differential equations. In the offline phase, the method constructs, through a component-wise empirical training, a library of archetype components defined by a component-wise reduced basis and hyperreduced quadrature rules with
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Growth of ferroelectric domain nuclei: Insight from a sharp-interface model J. Mech. Phys. Solids (IF 5.0) Pub Date : 2024-08-05 Hsu-Cheng Cheng, Laurent Guin, Dennis M. Kochmann
We present an analytical framework to study the impact of electromechanical properties on the growth of a ferroelectric nucleus. Ferroelectric domain evolution is typically simulated by phase-field models, which have shown that nuclei evolve from needle-like structures into complex domain patterns. However, there has been limited in-depth analysis of the interplay between electrostatics, mechanics
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Cancelling the effect of sharp notches or cracks with graded elastic modulus materials J. Mech. Phys. Solids (IF 5.0) Pub Date : 2024-08-05 M. Ciavarella
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Efficient aerodynamic shape optimization by using unsupervised manifold learning to filter geometric features Eng. Appl. Comput. Fluid Mech. (IF 5.9) Pub Date : 2024-07-31 Long Ma, Xiao-Jing Wu, Wei-Wei Zhang
Many aerodynamic shape optimization methods often focus on utilizing the end-to-end relationship between design variables and aerodynamic performance to find the optimal design, while overlooking t...
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Neural Operator induced Gaussian Process framework for probabilistic solution of parametric partial differential equations Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-03 Sawan Kumar, Rajdip Nayek, Souvik Chakraborty
The study of neural operators has paved the way for the development of efficient approaches for solving partial differential equations (PDEs) compared with traditional methods. However, most of the existing neural operators lack the capability to provide uncertainty measures for their predictions, a crucial aspect, especially in data-driven scenarios with limited available data. In this work, we propose
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An entirely SPH-based FSI solver and numerical investigations on hydrodynamic characteristics of the flexible structure with an ultra-thin characteristic Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-03 Tingting Bao, Jun Hu, Sijie Wang, Can Huang, Yong Yu, Ahmad Shakibaeinia
The fluid-flexible-structure interaction (FFSI) is characterized by the large deformation, the thin structure, and the complex turbulent flow field. Accurately simulating FFSI poses three challenges, which are the modeling of the thin structure, the capture of moving interface, and the numerical stability of multi-physics field coupling, respectively. In this study, the FFSI is simulated by the entirely
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Optimal design of unimorph-type cantilevered piezoelectric energy harvesters using level set-based topology optimization by considering manufacturability Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-03 Ken Miyajima, Takayuki Yamada
In this study, we propose a design methodology for a piezoelectric energy-harvesting device optimized for maximal power generation at a designated frequency using topology optimization. The proposed methodology is adapted to the design of a unimorph-type piezoelectric energy harvester, wherein a piezoelectric film is affixed to a singular side of a silicon cantilever beam. Both the substrate and the
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Corrigendum to “Study on predicting rolling contact fatigue of pitch bearing raceway in offshore wind turbine” [Int. J. Fatigue 184 (2024) 108284] Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-03 Haifeng He, Yiming Chen, Xin Jin, Heli Liu, Chunmei Wang
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A semi-empirical life-prediction model for multiaxial ratchetting-fatigue interaction of SUS301L stainless steel tubular welded joint Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-03 Huiliang Luo, Chao Yu, Yujie Liu, Qianhua Kan, Guozheng Kang
Based on the strain measured in the SUS301L stainless steel tubular welded joint in the asymmetrically stress-controlled multiaxial low-cycle fatigue tests by using the digital image correlation (DIC) method, the dependence of fatigue life on the loading level and loading path is well explained by discussing the multiaxial ratchetting-fatigue interaction in the fatigue failure zone of welded joint
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Evaluation of the accuracy and efficiency of the modified maximum variance method for multiaxial fatigue analysis under constant amplitude loading Int. J. Fatigue (IF 5.7) Pub Date : 2024-08-03 J.L.A. Ferreira, J.N. Dias, F.M. Lima, J.A. Araújo, C.R.M. da Silva
An optimized version of the Maximum Variance Method (MVM) is employed to determine maximum shear stress amplitudes in high-cycle multiaxial fatigue analysis using the critical plane approach, increasing accuracy and reducing computational burden. This refined approach posits that the MVM assumes that the critical plane is the one subjected to the maximum variance of the shear stress history. Comprehensive
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Fast permeability measurement for tight reservoir cores using only initial data of the one chamber pressure pulse decay test J. Mech. Phys. Solids (IF 5.0) Pub Date : 2024-08-03 Anh Tay Nguyen, Pouyan Asem, Yang Zhao, Zdeněk P. Bažant
In this study, a mathematical model for fast determination of the permeabilities of tight rocks using measurements taken from the initial period of the One Chamber Pressure Pulse Decay (OC-PPD) test is presented. The model applies to measurements taken both before and after the pressure pulse front has reached the downstream end of the specimen. The analytical solutions for the pressure decay in the
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Anisotropic damage evolution in solid fractures: A novel phase field approach with multiple failure criteria and directional-dependent structural tensor J. Mech. Phys. Solids (IF 5.0) Pub Date : 2024-08-03 Xiaocan Zou, Zhonghai Xu, Wenjie Li, Jin Gao, Chunxing Hu, Ruoyu Li, Xiaodong He
This study proposes a novel phase-field fracture model based on unified phase field theory, aiming to overcome current limitations in simulating material complex fracture behaviors. Through this model, analytical solutions for two-dimensional bars subjected to tensile or compressive stresses are provided, enabling the coupling of multiple failure criteria and further proficient simulation of mode-I
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Achieving ultrastrong adhesion of soft materials by discretized stress dispersion J. Mech. Phys. Solids (IF 5.0) Pub Date : 2024-08-03 Xiaochun Jiang, Qingqing Chen, Meng Yang, Xi Chen, Tongqing Lu, Tiejun Wang
The adhesion of soft materials often fails due to stress concentration at the interface. Structural design offers an effective approach to disperse stress at the interface and enhance adhesion properties. Herein, we introduce the concept of discretized stress dispersion to achieve ultrastrong adhesion of soft materials. This involves incorporating discrete structures at the adhesion interface, with
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Concurrent topology optimization of multiscale composites with differentiable microstructures Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-02 Jie Gao, Zepeng Wen, Xiaoya Zhai, Falai Chen, Hongmei Kang
To capitalize on the advantages of concurrent topology optimization while alleviating computational burdens, this paper introduces a novel design methodology termed (TVCTO) with differentiable microstructures. The filled differentiable microstructures represent a collection of parametrically controlled microstructures that are differentiable with respect to geometric and physical properties. This paper
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An isogemetric analysis formulation for the dynamics of geometrically exact viscoelastic beams and beam systems with arbitrarily curved initial geometry Comput. Methods Appl. Mech. Eng. (IF 6.9) Pub Date : 2024-08-02 Giulio Ferri, Enzo Marino
We present a novel formulation for the dynamics of geometrically exact Timoshenko beams and beam structures made of viscoelastic material featuring complex, arbitrarily curved initial geometries. An -consistent and second-order accurate time integration scheme for accelerations, velocities and rate-dependent viscoelastic strain measures is adopted. To achieve high efficiency and geometrical flexibility