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Analytical and ANN-based approaches for free vibration and nonlinear transient analysis of FG-GOEAM toroidal shell segments Comput. Struct. (IF 4.4) Pub Date : 2025-02-11 Vu Ngoc Viet Hoang, Pham Trung Thanh
This study investigates the free vibration and nonlinear transient response of functionally graded graphene origami (GOri)-enabled auxetic metamaterials (GOEAMs) toroidal shell segments under thermal conditions. The impact of the Winkler-Pasternak foundation, distributed in two configurations: centered and at both ends of the shell, is thoroughly examined.
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Locking-free polygonal plate element based on the discrete shear projection method Comput. Struct. (IF 4.4) Pub Date : 2025-02-11 G. Akhila, Sundararajan Natarajan, Haojie Lian, Irwan Katili
A novel shear locking free arbitrary polygonal element is proposed for thin/thick plates modelled by Reissner-Mindlin plate theory. The shear locking problem is alleviated by adopting a shear projection method. To do this, on each edge of the element, temporary variables are introduced, which facilitates approximating the rotations with a quadratic function. These are then written in terms of the nodal
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An efficient 3D corotational beam formulation using hybrid spatial discretization for nonlinear dynamics of flexible multibody system Comput. Struct. (IF 4.4) Pub Date : 2025-02-11 Boyang Wang, Zhuyong Liu, Tingke Wu
In this paper, an efficient and accurate 3D corotational beam formulation in fully explicit form is proposed for the nonlinear dynamics of flexible multibody systems. A hybrid spatial discretization scheme is presented, in which the internal force terms are described in the local frame and the inertial force terms are described in the global frame. The local frame is used to decompose rigid motions
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A novel explicit-implicit time integration method for solving time-dependent finite element equation: The Versa-δ method Comput. Struct. (IF 4.4) Pub Date : 2025-02-10 Mohammad Mahdi Malakiyeh, Saeed Shojaee, Saleh Hamzehei-Javaran
In this paper, we present a novel explicit–implicit time integration method for solving dynamic problems. The proposed method is designed to easily switch between explicit and implicit forms by adjusting certain control parameters. The remaining control parameters are optimized to ensure that the method would deliver a flawless performance in both forms. This method uses two sub-steps per time step
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Polygonal elements with Richardson-extrapolation based numerical integration schemes for hyperelastic large deformation analysis Comput. Struct. (IF 4.4) Pub Date : 2025-02-04 Du Dinh Nguyen, Minh Ngoc Nguyen, Tinh Quoc Bui
This paper presents a novel approach based on polygonal finite elements (PFEM) for hyperelastic large deformation analysis. Compared to the mesh of quadratic 8-node quadrangular finite elements (FEM-Q8), which is usually used in this problem type, a mesh of polygonal element usually requires less number of nodes (and thus less number of degrees of freedom), given the same number of elements. Traditionally
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A novel Chebyshev-based both meshfree method and shear deformation theory for functionally graded triply periodic minimal surface flat plates Comput. Struct. (IF 4.4) Pub Date : 2025-02-03 P. Phung-Van, P.T. Hung, Sawekchai Tangaramvong, H. Nguyen-Xuan, Chien H. Thai
This study introduces an innovative framework for the free vibration analysis of functionally graded (FG) triply periodic minimal surface (TPMS) plates. By utilizing Chebyshev polynomials, the study integrates a new shear deformation theory with a novel the moving Kriging meshfree method. The Chebyshev shear deformation theory is proposed, inherently satisfying the zero-shear stress condition at the
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A coupled FD-SPH framework for the damage evaluation of ceramic-steel composite structures subjected to blast loading Comput. Struct. (IF 4.4) Pub Date : 2025-01-31 Jian-Yu Chen, Xian-Zhao Song, Chong Peng
Ceramic-composite structures are important for developing lightweight vehicles under the threat of high explosives or improvised explosive devices on battlefields. In this paper, the damage process of the ceramic-steel double-layered target subjected to blast loading is simulated by developing a coupled finite difference-smoothed particle hydrodynamics methodology. The shock wave propagation in air
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On invariant and locking-free formulations for planar arbitrarily curved beams with Timoshenko-Ehrenfest beam model and peridynamic differential operator Comput. Struct. (IF 4.4) Pub Date : 2025-01-30 Duc Van Nguyen, Pana Suttakul, Minh Ngoc Nguyen, Erdogan Madenci, Tinh Quoc Bui, Jaroon Rungamornrat, Duy Vo
This study presents three formulations for the static, dynamic, and fracture simulations of planar arbitrarily curved beams using kinematic assumptions of Timoshenko-Ehrenfest beam model and peridynamic differential operator (PDDO). Displacements of the beam axis and rotation of the cross-section are considered as unknowns of the kinematic description. Two variants of the equations of motion are derived
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Shape monitoring of morphing wing structures using the inverse Finite Element Method Comput. Struct. (IF 4.4) Pub Date : 2025-01-30 Vincenzo Biscotti, Rinto Roy, Marco Gherlone
This work presents a closed-loop control strategy for morphing wing structures where the feedback originates from monitoring the actual deformed shape of the morphed skin. The approach is based on the inverse Finite Element Method (iFEM), able to reconstruct the displacement field of a structure by minimizing, in a least squares sense, the error between the analytical strains and those experimentally
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Cyclic nonlocal anisotropic damage modelling of concrete mesostructures with real-shaped aggregates Comput. Struct. (IF 4.4) Pub Date : 2025-01-30 A.A. Basmaji, A. Fau, R. Desmorat, U. Nackenhorst
Modelling and computing concrete mesostructures subjected to loads alternating between tension and compression are challenging. This paper presents a full computational model, from the random packing of real-shaped aggregates at the meso-scale to the FE computations with nonlocal anisotropic damage for alternate (cyclic) loading. Concrete is represented as a two-phase random heterogeneous material
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An adaptive port technique for synthesising rotational components in component modal synthesis approaches Comput. Struct. (IF 4.4) Pub Date : 2025-01-28 Xiang Zhao, My Ha Dao
Component Modal Synthesis (CMS) is a reduced order modelling method widely used for large-scale complex systems. It can effectively approximate system-level models through component synthesis, in which the repetitive geometrical components are modelled once and synthesised together. However, the conventional CMS only applies to systems with stationary components connected by strictly compatible ports
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RAGN-R: A multi-subject ensemble machine-learning method for estimating mechanical properties of advanced structural materials Comput. Struct. (IF 4.4) Pub Date : 2025-01-27 F. Kazemi, A. Ӧzyüksel Çiftçioğlu, T. Shafighfard, N. Asgarkhani, R. Jankowski
The utilization of advanced structural materials, such as preplaced aggregate concrete (PAC), fiber-reinforced concrete (FRC), and FRC beams has revolutionized the field of civil engineering. These materials exhibit enhanced mechanical properties compared to traditional construction materials, offering engineers unprecedented opportunities to optimize the design, construction, and performance of structures
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Phase-field modeling of brittle anisotropic fracture in polycrystalline materials under combined thermo-mechanical loadings Comput. Struct. (IF 4.4) Pub Date : 2025-01-24 Raj Kiran, Krishana Choudhary, Nhon Nguyen-Thanh
Phase-field modeling, owing to the regularized representation of discrete crack topologies, provides an efficient and robust framework for simulating complex fracture mechanisms in brittle materials. This study proposes an adaptive isogeometric-based approach to comprehend the fracture behaviour of polycrystalline materials under different thermo-mechanical loadings. The model considers anisotropy
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A conformal optimization framework for lightweight design of complex components using stochastic lattice structures Comput. Struct. (IF 4.4) Pub Date : 2025-01-20 Zhuangyu Li, Hui Liu, Changri Xiong, Wenlei Xiao, Shulin Chen, Ziteng Zhu, Gang Zhao
Multi-scale lattice structures are celebrated for their superior mechanical properties and have been widely adopted across various engineering disciplines. Traditional periodic multi-scale lattice structures, however, often struggle with maintaining the fidelity of the original model's boundaries, encounter complex geometric modeling processes, and require extensive optimization times. This paper introduces
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Time integration scheme for nonlinear structural dynamics, FAM, including structural vibration control Comput. Struct. (IF 4.4) Pub Date : 2025-01-20 Carlos M. Patlán, Hugo Hernández-Barrios, Iván F. Huergo, Francisco Domínguez-Mota
In this study, a method for the integration of the equation of motion for the inelastic analysis of structures utilizing the Force Analogy Method (FAM) and nonlinear control systems is proposed. The method is implicit, unconditionally stable, one-step scheme, multi-stage, with second-order precision, self-start capability, and high-frequency response filtering, exhibiting low overshooting. It enables
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Multiphysics Modeling of Chloride-Induced Corrosion Damage in Concrete Structures Comput. Struct. (IF 4.4) Pub Date : 2025-01-20 Mojtaba Aliasghar-Mamaghani, Ioannis Koutromanos, Carin Roberts-Wollmann, Matthew Hebdon
This paper presents a computational scheme describing the formation and evolution of cracks in concrete structures due to chloride-induced corrosion in reinforcing or prestressing steel. The scheme accounts for coupled heat, moisture and chloride transport, while phenomenologically describing the kinetics of the electrochemical corrosion reaction in steel, formation of expansive corrosion products
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Impact of non-local damage formulation on chloride transport modeling in concrete Comput. Struct. (IF 4.4) Pub Date : 2025-01-10 Pavel Trávníček, Jiří Němeček, Tomáš Koudelka, Jaroslav Kruis
Reinforced concrete structures, such as roads and bridges, are exposed to chloride ingress, leading to steel reinforcement corrosion and reduced service life. Accurate numerical simulations of chloride ingress must account for damage caused by loading, as higher damage increases diffusion. This paper analyzes the impact of selected damage evolution laws and non-local formulations on the diffusion coefficient
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An analytical approach to the sensitivity analysis of semi-recursive ODE formulations for multibody dynamics Comput. Struct. (IF 4.4) Pub Date : 2025-01-10 Álvaro López Varela, Daniel Dopico Dopico, Alberto Luaces Fernández
Sensitivity analysis is an extremely powerful tool in many applications such as in the optimization of the dynamics of multibody systems with gradient-based methods. Sensitivity calculations are computationally burdensome and, depending on the method chosen for differentiation and the set of dynamic equations, they could result highly inefficient. Semi-recursive dynamic methods are seldom studied analytically
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Corrigendum to “Topology optimization of lattice structures for target band gaps with optimum volume fraction via Bloch-Floquet theory” [Comput. Struct. 307 (2025) 107601] Comput. Struct. (IF 4.4) Pub Date : 2025-01-09 F. Gómez-Silva, R. Zaera, R. Ortigosa, J. Martínez-Frutos
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An efficient archive-based parameter-free multi-objective Rao-DE algorithm for bi-objective optimization of truss structures Comput. Struct. (IF 4.4) Pub Date : 2025-01-08 Viet-Hung Truong, Sawekchai Tangaramvong, Hoang-Anh Pham, Manh-Cuong Nguyen, Rut Su
Metaheuristic algorithms have proven effective for complex optimization problems, including truss design, yet many require specific parameter settings, leading to increased complexity. This paper proposes an archive-based parameter-free multi-objective Rao-Differential Evolution (APMORD) algorithm for bi-objective optimization of truss design problems. APMORD simplifies the process by integrating the
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A discontinuous Galerkin method based isogeometric analysis framework for flexoelectricity in micro-architected dielectric solids Comput. Struct. (IF 4.4) Pub Date : 2025-01-08 Saurav Sharma, Cosmin Anitescu, Timon Rabczuk
Flexoelectricity, the generation of electric field in response to a strain gradient, is a universal electromechanical coupling, dominant only at small scales due to its requirement of high strain gradients. This phenomenon is governed by a set of coupled fourth-order partial differential equations (PDEs), which require C1 continuity of the basis in finite element methods for the numerical solution
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Frequency-dependent mass, elastic and geometric stiffness matrices of an axially loaded Timoshenko-Ehrenfest beam with applications Comput. Struct. (IF 4.4) Pub Date : 2025-01-08 J.R. Banerjee
Earlier research on the development of explicit algebraic expressions for the elements of the frequency-dependent mass, elastic and geometric stiffness matrices for free vibration analysis was carried out on Bernoulli-Euler, Timoshenko-Ehrenfest and axially loaded Bernoulli-Euler beams. Seeking solution for the correspondingly more difficult problem for an axially loaded Timoshenko-Ehrenfest beam seemed
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Stacked-based machine learning to predict the uniaxial compressive strength of concrete materials Comput. Struct. (IF 4.4) Pub Date : 2025-01-06 Abdelrahman Kamal Hamed, Mohamed Kamel Elshaarawy, Mostafa M. Alsaadawi
Compressive strength is a key factor in the design and durability of concrete structures. Accurate prediction of compressive strength helps optimize material use and reduce construction costs. This study proposes a novel stacked model for predicting compressive strength, integrating three base models with linear regression. The base models include Artificial Neural Networks, Random Forest, and Extreme
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Wheel-rail dynamic interaction induced by tread spalling integrating with pre-fatigue damage of materials Comput. Struct. (IF 4.4) Pub Date : 2025-01-06 Jinneng Wang, Xiongfei Zhou, Kai Liu, Kaiyun Wang, Lin Jing
Tread spalling is a typical damage type of wheel tread of railway vehicles, which produces severe wheel-rail dynamic interaction, further aggravating the deterioration of crucial components of vehicle and track, especially for coupling with fatigue damage of wheel/rail materials generated in the long-term operation. In this study, a comprehensive three-dimensional (3-D) wheel-rail transient contact
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Homogenization based topology optimization of a coupled thermal fluid-structure problem Comput. Struct. (IF 4.4) Pub Date : 2025-01-03 Godfred Oheneba Agyekum, Laurent Cangémi, François Jouve
This article focuses on the topology optimization of a weakly coupled three physics problem. The structures are made of periodically perforated material, where the microscopic periodic cell is macroscopically modulated. The objective is to optimize the homogenized formulation of this system, where the coupling is weak because the three physics involved are solved consecutively: first, a coupled fluid
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Continuum mechanics-based shell elements with six degrees of freedom at each node − the MITC4 / D and MITC4+ / D elements Comput. Struct. (IF 4.4) Pub Date : 2025-01-03 Yeongbin Ko, Klaus-Jürgen Bathe, Xinwei Zhang
We give the formulation and numerical assessment for using six degrees of freedom at each node of 4-node continuum mechanics-based quadrilateral shell elements. The formerly published MITC4 and MITC4 + shell elements are considered and extended to now include the drilling rotational degrees of freedom at the nodes. Including these degrees of freedom enables the modeling of shells with beam elements
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Accurate and flexible shape sensing of shell structures with polygonal inverse finite element method Comput. Struct. (IF 4.4) Pub Date : 2024-12-30 Shishun Zhang, Xiao Xiao, Hanyu Chen, Jianping Xuan
The inverse Finite Element Method (iFEM) based on triangular and quadrilateral elements faces significant challenges in complex shell structures due to slow convergence or poor mesh quality. In this study, a novel variable-node polygonal iFEM is developed to enhance the accuracy and flexibility of shape sensing for complex shell structures. Shear and membrane behaviors are respectively improved by
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On the use of the inverse finite element method to enhance knowledge sharing in population-based structural health monitoring Comput. Struct. (IF 4.4) Pub Date : 2024-12-27 Giulia Delo, Rinto Roy, Keith Worden, Cecilia Surace
Efficient Structural Health Monitoring (SHM) is critical for ensuring safety and improving the operation and maintenance of aerospace structures. This study focusses on advanced shape-sensing methods, such as the inverse Finite Element Method (iFEM), which can estimate the complete displacement field of a structure based on a restricted number of strain measurements, fostering continuous and real-time
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Extended spectral element formulation for modeling the propagation of nonlinear ultrasonic waves produced by multiple cracks in solid media Comput. Struct. (IF 4.4) Pub Date : 2024-12-27 Feilong Li, Yue Su, Xiaoqiang Sun
This study presents a novel time-domain extended spectral element method (TD-XSEM) that can efficiently and accurately simulate interactions between ultrasonic waves and multiple randomly distributed and oriented cracks in solid materials. Compared to the conventional TD-SEM, which excels at large-scale structures but struggles with small discontinuities and contact issues, our TD-XSEM integrates linear
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Nonlinear finite element analysis of layered steel fiber reinforced concrete beams Comput. Struct. (IF 4.4) Pub Date : 2024-12-24 Anas M.H. Fares, Burcu Burak Bakir
This study investigates the effect of fiber properties and SFRC layer thickness on the flexural behavior of layered beams that undergo both compression and tension failures. Four specimens tested in a prior experimental study are modeled utilizing nonlinear finite element software ABAQUS, and numerical results are verified by comparison with experimental results. Contrary to existing nonlinear models
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Ground structure method-based stiffener layout topology optimization for horizontal machining center headstock cover plate Comput. Struct. (IF 4.4) Pub Date : 2024-12-23 Hongyu Liu, Zheng Qiu, Jun Shi, Jianhong Sun, Song Zhang
Structural dynamic performance of a machine tool greatly affects machining precision and productivity. One effective approach in improving the dynamic performance is by applying topology design optimization to the machine tool structure. A method based on the Ground Structure Method (GSM) is established to optimize the layout of stiffener structure. The GSM is employed for the construction of the stiffener
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Simultaneous optimization of topology and bi-material distribution of three-dimensional structures for addressing local heat accumulation in layer-upon-layer additive manufacturing process Comput. Struct. (IF 4.4) Pub Date : 2024-12-20 Nima Yaghoobi, Mohammad Hossein Abolbashari
This paper introduces a novel approach based on a topology optimization (TO) model to efficiently distribute material phases for minimizing structural compliance and enhance local heat evacuation in additive manufacturing (AM). The approach simultaneously optimizes the structure for its intended function and behavior during layer-by-layer production. While AM allows intricate, topologically optimal
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Modular-topology optimization for additive manufacturing of reusable mechanisms Comput. Struct. (IF 4.4) Pub Date : 2024-12-20 Marek Tyburec, Martin Doškář, Michael Somr, Martin Kružík, Jan Zeman
Modular designs have gained popularity because they can generally address manufacturing efficiency, reusability, and sustainability concerns. Here, we contribute to the growing field by proposing a fully automatic design method for modules utilized in several products. Our manufacturing-aware procedure is composed of three consecutive steps: (i) free-material optimization for obtaining the optimal
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Advanced 3D Hamiltonian nodal position finite element method for nonlinear dynamic analysis of rotating solids Comput. Struct. (IF 4.4) Pub Date : 2024-12-19 Fuzhen Yao, Chaofeng Li, Zheng H. Zhu
This paper develops a novel 3D brick element by Nodal Position Finite Element Method (NPFEM) to effectively model rotating solids. It uses nodal positions instead of nodal displacements to formulate element’s strain and kinetic energies. This approach effectively avoids computational errors caused by spurious strains induced by large rigid-body rotations and can automatically account for stiffening
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An explicit topology and thickness control approach in SIMP-based topology optimization Comput. Struct. (IF 4.4) Pub Date : 2024-12-18 Tongxing Zuo, Haitao Han, Qianglong Wang, Qiangwei Zhao, Zhenyu Liu
In order to improve the topology optimization results for the requirements such as manufacturability and functionality, and to strengthen the link between structural topology optimization and computational topology, this paper measures the topology and thickness of the structure using topological invariants (i.e., Euler characteristic and Betti numbers) in the computational topology. Based on set theory
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Non-parametric ground motion model for displacement response spectra and Fling for Himalayan region using machine learning Comput. Struct. (IF 4.4) Pub Date : 2024-12-16 Jyothi Yedulla, Ravi Kanth Sriwastav, S.T.G. Raghukanth
Displacement response spectra (DRS) are crucial for seismic design as earthquake damage correlates more with displacements than forces. Previous efforts to develop attenuation relations for DRS have been largely approximate. Permanent displacement or Fling poses significant design, repair and rehabilitation challenges. Consideration of DRS and Fling in seismic design and performance assessment necessitates
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Dynamic characterization of cross-physics coupling strengths, a methodology to coupling and reordering partitioned solvers for multiphysics applications Comput. Struct. (IF 4.4) Pub Date : 2024-12-13 Christopher Nahed, Jacques de Lamare
The role of dimensionless ratios in engineering and physics is ubiquitous; but their utility in the multiphysics community is sometimes overlooked. Notably, in the multiphysics modelling community, coupling methods are often discussed and developed without an explicit monitoring of the various dimensionless ratios of the various inter-physics coupling terms. However, it is evident that the varying
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Topology optimization of lattice structures for target band gaps with optimum volume fraction via Bloch-Floquet theory Comput. Struct. (IF 4.4) Pub Date : 2024-12-13 F. Gómez-Silva, R. Zaera, R. Ortigosa, J. Martínez-Frutos
In this work, a topology optimization algorithm has been developed to design bi-material lattice structures showing a band gap around a target frequency, using just one unit cell through the application of Bloch-Floquet theorem. The Bidirectional Evolutionary Structural optimization (BESO) method has been employed, based on bi-material interpolation. A new objective function has been defined, which
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Coupling of finite and boundary element methods for contact analysis of dielectric solids immersed in electrostatic medium Comput. Struct. (IF 4.4) Pub Date : 2024-12-13 Moonhong Kim, Dongwoo Sohn
This paper introduces a novel approach for analyzing the frictionless two-dimensional contact between dielectric solids in an electrostatic medium. This analysis is achieved by combining the finite element and boundary element methods. The finite elements model elastic dielectric solids undergoing geometrically nonlinear mechanical deformation and electric polarization. We present a finite element-based
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Open-source implementations and comparison of explicit and implicit crystal-plasticity finite element methods Comput. Struct. (IF 4.4) Pub Date : 2024-12-12 Hassan M. Asadkandi, Tomáš Mánik, Bjørn Holmedal, Odd Sture Hopperstad
In this study, two state-of-the-art implementations of the rate-dependent Crystal Plasticity Finite Element Method (CPFEM) as user material subroutines in the finite element solvers Abaqus/Explicit and Abaqus/Standard (Implicit) are presented. Adaptive substepping in the explicit solver and line-search stabilized implementation in the implicit solver enable fast and stable calculations also for small
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Improved hexahedral mesh generation from quadrilateral surface meshes Comput. Struct. (IF 4.4) Pub Date : 2024-12-12 Jingchen Gao, Zhoufang Xiao, Shuwei Shen, Chenhao Xu, Jingjing Cai, Gang Xu
The quadrilateral surface mesh modification method based on dual cycle operations shows promising advantages in hexahedral mesh generation. However, as only simple cycle eliminations are considered, the existing methods can not handle complex surface meshes. In this study, an improved method based on cycle elimination is proposed for high-quality hexahedral mesh generation from a given quadrilateral
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An enrichment of Q4γs plate finite element using incomplete quadratic functions, an assumed energy orthogonality of Bergan’s free formulation, and mixed transverse shear strains Comput. Struct. (IF 4.4) Pub Date : 2024-12-12 Andi Makarim Katili, Kai-Uwe Bletzinger, Irwan Katili
This paper introduces a new quadrilateral plate element named DSPM4, which improves upon the previous Q4γs element. The DSPM4 element has twelve DOFs and four temporary DOFs at the mid-sides of the element. The rotation functions βs are modified by adding an incomplete quadratic function to improve the bending performance. An orthogonality condition between the lower and higher-order bending energy
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A framework for developing a machine learning-based finite element model for structural analysis Comput. Struct. (IF 4.4) Pub Date : 2024-12-10 Gang Li, Rui Luo, Ding-Hao Yu
This paper presents a machine learning-based finite element construction method (MLBFE) to predict a precise strain field with minimal nodes. The method first establishes a standardized MLBFE model via the substructure concept and the static condensation method. Then, a training data collection method involving nodal displacements and strain fields, and considering (1) boundary continuity, (2) strain
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A space-time approach for the simulation of brittle fracture with phase-field models in elastodynamics Comput. Struct. (IF 4.4) Pub Date : 2024-12-10 F.K. Feutang, S. Lejeunes, D. Eyheramendy
A space-time approach is proposed to simulate the propagation of brittle cracks in an isotropic and elastic solid in dynamics. We adopt the so called phase-field description of crack that is based on a variational representation of fracture mechanics. Due to this variational structure, the crack initiation and propagation can be then described thanks to a well chosen potential. In this approach, we
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A refined aeroelastic beam finite element for the stability analysis of flexible subsonic wings Comput. Struct. (IF 4.4) Pub Date : 2024-12-09 Carmelo Rosario Vindigni, Giuseppe Mantegna, Calogero Orlando, Andrea Alaimo, Marco Berci
In this work, a novel finite element approach for the computational aeroelastic analysis of flexible lifting structures in subsonic flow is presented. The numerical simulation of the fluid-structure interaction relies on the physical concept and mathematical formulation of an aeroelastic beam element, that is based on Euler-Bernoulli and De Saint-Venant theories for the structure dynamics and modified
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Design of compliant thermal actuators using topology optimization involving design-dependent thermal convection and pressure load Comput. Struct. (IF 4.4) Pub Date : 2024-12-06 Shuya Onodera, Takayuki Yamada
This study presents a topology optimization method for thermal actuators that accounts for boundary conditions influenced by variables such as thermal convection and pressure load. Thermal actuators with gripper-like designs are essential for handling hot and brittle materials. The objective of this study is to design actuator shapes that achieve an optimal balance between flexibility and stiffness
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Buckling analysis of structures with local abnormality using non-uniform spline finite strip method Comput. Struct. (IF 4.4) Pub Date : 2024-12-05 Hao Yu, Pizhong Qiao
Significance of structural components with local abnormality in buckling analysis has drawn considerable interest from researchers. A versatile and effective non-uniform spline finite strip method (N-u SFSM) is developed to allow for mesh refinement in local zones, enabling a comprehensive analysis of buckling characteristics of structures with local abnormality. The inclusion of non-uniform spline
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Bayesian updating using accelerated Hamiltonian Monte Carlo with gradient-enhanced Kriging model Comput. Struct. (IF 4.4) Pub Date : 2024-12-04 Qiang Li, Pinghe Ni, Xiuli Du, Qiang Han, Kun Xu, Yulei Bai
Bayesian methods have been widely used to improve the accuracy of finite element model in civil engineering. However, Bayesian methods generally suffer from the computational complexity involved in accurately identifying the posterior distribution. To address this issue, this paper proposes a novel method by combining the Hamiltonian Monte Carlo (HMC) algorithm with the gradient-enhanced Kriging (GEK)
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A review on computational linear and nonlinear dynamic analysis of shell-type composite structures Comput. Struct. (IF 4.4) Pub Date : 2024-11-28 Dervis Baris Ercument, Saeid Sahmani, Babak Safaei
Composite materials allow the production of structures with desired and improved properties (such as high strength), while minimizing the undesirable outcomes (e.g., increased weight). This ability to tune the properties of materials and structures has put composite materials under the spotlight in many fields, ranging from medical, automotive, aerospace, marine, and civil engineering applications
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Multiscale concurrent topology optimization of transient thermoelastic structures Comput. Struct. (IF 4.4) Pub Date : 2024-11-28 Yanding Guo, Shanshan Cheng, Lijie Chen
Previous multiscale concurrent topology optimization methods for thermoelastic structures were primarily based on static loading and steady-state heat transfer conditions, which do not account for transient effects associated with time-dependent loads. To address this limitation, this paper establishes a novel generic multiscale concurrent topology optimization method that incorporates transient thermoelastic
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Data-driven FEM cluster-based basis reduction method for ultimate load-bearing capacity prediction of structures under variable loads Comput. Struct. (IF 4.4) Pub Date : 2024-11-27 Yinghao Nie, Xiuchen Gong, Gengdong Cheng, Qian Zhang
The structural ultimate load-bearing capacity plays an influential role in engineering applications. Melan’s static shakedown theorem offers a valuable approach for predicting the lower bound of shakedown loading factors and providing a safer shakedown domain when the structures are subjected to cyclic variable loads. However, the associated nonlinear mathematical programming is plagued by substantial
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Efficient methods to build structural performance envelopes in characteristic load space Comput. Struct. (IF 4.4) Pub Date : 2024-11-26 S. Sheshanarayana, C.G. Armstrong, A. Murphy, T.T. Robinson, N.L. Iorga, J.R. Barron
Performance envelopes provide a novel methodology that quantifies the load bearing capacity of a structure in a reduced dimension load space. The envelopes relate the complex loads acting on a structure to the corresponding structural failure constraints and may find many applications within the aircraft structural design process. Constructing envelopes for industrial problems is of particular interest
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A Cepstrum-Informed neural network for Vibration-Based structural damage assessment Comput. Struct. (IF 4.4) Pub Date : 2024-11-25 Lechen Li, Adrian Brügger, Raimondo Betti, Zhenzhong Shen, Lei Gan, Hao Gu
Data-driven methods for vibration-based Structural Health Monitoring (SHM) have gained significant popularity for their straightforward modeling process and real-time tracking capabilities. However, developing complex models such as deep neural networks can pose challenges, including limited interpretability and substantial computational demands, due to the large number of parameters and deep layer
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A non-classical computational method for modelling functionally graded porous planar media using micropolar theory Comput. Struct. (IF 4.4) Pub Date : 2024-11-25 AbdolMajid Rezaei, Razie Izadi, Nicholas Fantuzzi
The current study proposes a computational-based method to employ the non-classical micropolar continuum for modelling plates with in-plane functionally graded porosities. Initially, a homogenisation method is developed to derive the micropolar parameters of porous heterogenous plates based on strain energy equivalence in various designed deformations simulated via finite element analysis. The modelling
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Extended formulation of macro-element based modelling – Application to single-lap bonded joints Comput. Struct. (IF 4.4) Pub Date : 2024-11-20 Sébastien Schwartz, Éric Paroissien, Frédéric Lachaud
An extended formulation of the macro-element (ME) based models, representing for both adherends and adhesive along the entire overlap in only one four-node element, is presented. Compared to earlier modelling, continuum ME (CME) and discrete ME (DME) based models, the adherend parts are also modelled as plane continuum media, for which high order displacement fields are freely supposed. Both extended
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Synergistic approach: Peridynamics and machine learning regression for efficient pitting corrosion simulation Comput. Struct. (IF 4.4) Pub Date : 2024-11-20 J. Ramesh Babu, S. Gopalakrishnan
Corrosion-induced material deterioration poses a pervasive threat to structural integrity, necessitating an in-depth understanding of its intricate behaviors. Pitting corrosion, a critical concern in this context, accelerates the degradation of materials. The limitations of conventional models arise from their neglect of the subsurface electrode boundary layer dynamics during the dissolution process
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New implicit time integration schemes for structural dynamics combining high frequency damping and high second order accuracy Comput. Struct. (IF 4.4) Pub Date : 2024-11-20 Eman Alhayki, Wulf G. Dettmer
The time integration schemes, GA-23 and GA-234, recently proposed by the authors for first order problems, are extended to solve second-order problems in structural dynamics. The resulting methods maintain unconditional stability and user-controlled high-frequency damping. They offer improved accuracy and exhibit less numerical damping in the low-frequency regime, outperforming the well-known generalised-α
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Conforming embedded isogeometric analysis for B-Rep CAD models with strong imposition of Dirichlet boundary conditions using trivariate B++ splines Comput. Struct. (IF 4.4) Pub Date : 2024-11-20 Xuefeng Zhu, Guangwu Ren, Xiangkui Zhang, Chunhui Yang, An Xi, Ping Hu, Zheng-Dong Ma
Strong imposition of Dirichlet boundary conditions for immersed finite element methods or immersed isogeometric methods remains a challenge. To address this issue, this paper presents a 3D conforming embedded isogeometric method for Boundary-Represented (B-Rep) solid CAD models by generalizing our bivariate B++ splines to trivariate B++ Splines. The proposed method can convert a B-Rep model into a
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Prediction of nonlinear dynamic responses and generation of seismic fragility curves for steel moment frames using boosting machine learning techniques Comput. Struct. (IF 4.4) Pub Date : 2024-11-19 Farzaneh Zareian, Mehdi Banazadeh, Mohammad Sajjad Zareian
The main objective of this paper is to develop machine learning (ML) models for predicting the seismic responses of steel moment frames. For this purpose, four boosting ML techniques-gradient boosting, XGBoost, LightGBM, and CatBoost-were developed in Python. To create an inclusive dataset, 92,400 nonlinear time-history analyses were performed on 1,848 steel moment frames under 50 earthquakes using
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Bearing capacity analysis of RC slabs under cyclic loads: Dual numerical approaches Comput. Struct. (IF 4.4) Pub Date : 2024-11-16 Phuc L.H. Ho, Canh V. Le, Dung T. Tran, Phuong H. Nguyen, Jurng-Jae Yee
Shakedown analysis is a powerful and efficient tool for calculating the safety factors of structures under variable and repeated external quasi-static loads, that can prevent structures from incremental and alternative plasticity collapses. RC slabs in practical engineering applications are usually under long-tern variable and cyclic loads, but their fatigue behavior was rarely reported in the literature