Article
Mechanics
Ananda Babu Arumugam, Mageshwaran Subramani, Manish Dalakoti, Prakhar Jindal, Rajeshkumar Selvaraj, Esmail Khalife
Summary: This article presents the vibration and damping characteristics of a laminated composite cylindrical sandwich shell with a carbon nanotube reinforced magnetorheological elastomer (CNT-MRE) core. The governing equations of motion for the cylindrical CNT-MRE sandwich shell are derived using a higher order shear deformation theory (HSDT) based on finite element formulation. The validity of the presented HSDT model is verified by comparing it with an ABAQUS model. The influence of CNT reinforcement in the MRE layer and various parameters on the stiffness and damping behavior of the composite cylindrical CNT-MRE sandwich shell is investigated.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Engineering, Civil
Gholam Reza Asgari, Amirbahador Arabali, Masoud Babaei, Kamran Asemi
Summary: This study investigates the dynamic instability of a sandwich beam composed of an isotropic core and functionally graded graphene platelets-reinforced composite (GPLRC) face sheets for the first time. A comprehensive investigation is conducted to assess the effects of various factors on the dynamic instability regions (DIRs) of the beam.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2022)
Article
Engineering, Civil
E. Mohammad-Rezaei Bidgoli, Mohammad Arefi
Summary: This paper studies the nonlinear vibration analysis of a composite sandwich with graphene nanoplatelets. The displacement field of the sandwich plate is developed based on first-order shear deformation theory and geometric nonlinearity is considered in the constitutive relations. The governing equations of motion are derived using Hamilton's principle and solved using Galerkin's approach. The nonlinear frequency and the nonlinear-to-linear frequency ratio are computed based on the input parameters of the honeycomb structure and graphene nanoplatelets.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2023)
Article
Mathematics
Mohammed Sobhy, Fatemah H. H. Al Mukahal
Summary: This paper investigates wave propagation in a new three-layer structure composed of piezoelectromagnetic material reinforced with graphene platelets. The study shows that the geometry of the plates, material distribution, and external electric and magnetic potentials have significant effects on the wave frequency and phase velocity of the lightweight plates.
Article
Mechanics
Qilin Jin, Qiang Zuo
Summary: A novel electro-mechanical coupling theory is proposed for the free vibration analysis of graphene-reinforced sandwich plates with piezoelectric face sheets. The theory improves the accuracy of interlaminar shear stress and enhances the precision of the free vibration response of piezoelectric sandwich plates. Compared to existing theories, the proposed theory produces more accurate results. A comprehensive parametric study is also conducted to understand the impact of significant parameters on the free vibration behavior of piezoelectric graphene-reinforced sandwich plates.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Engineering, Civil
M. S. H. Al-Furjan, Ahmad Farrokhian, S. R. Mahmoud, Reza Kolahchi
Summary: This study investigates the low-velocity impact behavior of nanocomposite sandwich truncated conical shells, using novel mathematical models and shear deformation theories, and experimentally examines the effects on the sandwich structure.
THIN-WALLED STRUCTURES
(2021)
Article
Engineering, Mechanical
Saeed Kamarian, Mahdi Bodaghi, Reza Barbaz Isfahani, Jung-il Song
Summary: This study investigates the use of carbon nanotubes (CNTs) to increase the critical buckling temperature of sandwich plates with soft core and laminated composite face sheets. Experimental tests show that the addition of only 0.3% CNTs significantly enhances the thermo-mechanical properties of the composite face sheets. Thermal buckling equations for sandwich plates with CNT-reinforced face sheets are derived and various analytical methods are employed to analyze the thermal buckling behavior, with results showing a 22%-36% increase in critical buckling temperature due to CNTs.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Engineering, Civil
B. Alanbay, R. C. Batra
Summary: In this study, a surrogate optimization algorithm and numerical technique were used to analyze the dynamic deformations of sandwich structures with fiber-reinforced face sheets. The goal was to minimize the structural mass and maximize its blast mitigating capabilities. Simulation results showed that the mass density and elastic modulus of the core layers did not continuously vary through the thickness.
THIN-WALLED STRUCTURES
(2022)
Article
Mechanics
Xin Wang, Xue Li, Zeng-Shen Yue, Run-Pei Yu, Qian-Cheng Zhang, Shao-Feng Du, Zhi-Kun Yang, Bin Han, Tian Jian Lu
Summary: The study systematically investigated the vibration damping characteristics of laser-welded sandwich panels with high stiffness and high damping, and analyzed the accuracy of using surrogate models to approximate the damping loss factor of the sandwich panels. An efficient optimization procedure was proposed, factoring in structural stiffness, damping loss, and weight of the sandwich panel.
COMPOSITE STRUCTURES
(2021)
Article
Mechanics
Niloufar Adab, Mohammad Arefi, Marco Amabili
Summary: The free vibrational behavior of rotating truncated conical sandwich microshells is investigated in this paper using FSDT and MCST. The effective mechanical properties of the face sheets are computed using the rule of mixture and Halpin-Tsai model, and the equations of motion are derived incorporating centrifugal and Coriolis accelerations. The accuracy and convergence of the solution are verified, and the influence of various parameters on the frequencies of the microshells is studied.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Hamid Frahlia, Riadh Bennai, Mokhtar Nebab, Hassen Ait Atmane, Abdelouahed Tounsi
Summary: This study investigates the vibration response of a functionally graded plate on a viscoelastic foundation. An analytical solution based on high-order shear deformation theory is proposed, which has fewer unknowns compared to other theories. The proposed theory uses integer terms in the displacement field and includes shear deformation without correction factors. Numerical results show that the proposed theory is in good agreement with other available results and can be used to solve free vibration problems of functionally graded plates on visco-Pasternak media.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Mechanics
Pooriya Shahali, Hassan Haddadpour, Saeed Shakhesi
Summary: This study uses computational methods to investigate the natural frequencies, loss factors, and mode shapes of a sandwich cylinder with moderately thick functionally graded face sheets and an electrorheological fluid core. The results provide important insights into the effects of material and structural parameters on these properties.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Korosh Khorshidi, Mehdi Rezaeisaray, Mahdi Karimi
Summary: This research investigates a piezo harvester made of a honeycomb sandwich panel, which offers more flexibility in stiffness compared to traditional cantilever beam structures, resulting in improved harvested energy performance. Different types of shear deformable plate theories were utilized, and a parametric study was conducted to explore the impacts of various parameters on the electrical power and voltage of the harvester.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Article
Mechanics
Moein Zanjanchi, Majid Ghadiri, Saeid Sabouri-Ghomi
Summary: This study aims to analyze the nonlinear vibration and instability of a sandwich plate with an Auxetic Honeycomb core and a Carbon Nanotube Reinforced Composite (CNTRC) face layer on a viscous elastic foundation under parametric excitation. The analytical model used the Hamilton principle and nonlinear strain-displacement relations to solve the governing equations through the Galerkin method and the multiple-scale method. The results provide valuable insight into optimizing the design of sandwich plates for engineering applications in the aerospace and automotive industries.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2023)
Article
Engineering, Civil
Huu-Quoc Tran, Van-Tham Vu, Van-Long Nguyen, Minh-Tu Tran
Summary: This article analyzes the nonlinear dynamic behavior and free vibration of a piezoelectric auxetic honeycomb sandwich plate on a Pasternak elastic substrate. It establishes nonlinear equations of motion using the first-order shear deformation plate theory and von Kármán type nonlinear strain-displacement relationship. The displacement-time and acceleration-displacement curves are determined by using the Galerkin and Runge-Kutta fourth-order methods, and verification examples confirm the accuracy of the model. Novel investigations evaluate the effect of material, geometrical parameters, and elastic substrate coefficients on the frequency and nonlinear dynamic characteristics of the piezoelectric auxetic honeycomb sandwich plate for both open-circuit and closed-circuit operation.
THIN-WALLED STRUCTURES
(2023)
Article
Computer Science, Interdisciplinary Applications
D. Dinh-Cong, T. Nguyen-Thoi
Summary: The article presents the application of a multi-objective cuckoo search algorithm for structural damage identification in composite structures made of functionally graded materials. The proposed algorithm is able to accurately identify the locations and extent of multi-damages using spatially incomplete measurement data with noise contamination. Numerical simulation studies show that the multi-objective cuckoo search algorithm provides better damage prediction compared to two other well-known algorithms.
ENGINEERING WITH COMPUTERS
(2023)
Article
Computer Science, Interdisciplinary Applications
Pham Toan Thang, Dieu T. T. Do, Jaehong Lee, T. Nguyen-Thoi
Summary: This paper presents an in-depth study on the influence of nanoscale parameters on the bending and free vibration responses of functionally graded carbon nanotube-reinforced composite nanoshells. Mathematical formulas and numerical calculations are used to investigate the effect of nanoscale parameters, material properties, and shell shapes on the deflection and fundamental frequency parameters of the nanoshells.
ENGINEERING WITH COMPUTERS
(2023)
Article
Computer Science, Interdisciplinary Applications
Quoc-Hoa Pham, Phu-Cuong Nguyen, Trung Thanh Tran, Trung Nguyen-Thoi
Summary: This paper proposes a finite element method for the free vibration analysis of a sandwich nanoplate with an auxetic honeycomb core. The method uses a nonlocal elasticity theory and a shear deformation theory without shear correction factors, and it is applicable to sandwich nanoplates with negative Poisson's ratio.
ENGINEERING WITH COMPUTERS
(2023)
Article
Engineering, Civil
H. S. Naveen Kumar, Subhaschandra Kattimani, Flavio D. Marques, T. Nguyen-Thoi, Mehdi Shariati
Summary: This research investigates the geometrically nonlinear behavior of functionally graded saturated porous material (FGSPM) plate under undrained conditions. The refined shear deformation plate theory (RSDPT) is used to model the FGSPM plate with von Karman's nonlinearity, and Biot's linear poroelasticity theory is applied to establish the constitutive equations. The results show that the saturated fluid significantly affects the nonlinear deflection and vibration behavior of the FGSPM plate.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2023)
Article
Computer Science, Artificial Intelligence
Thao Nguyen-Trang, Trung Nguyen-Thoi, Kim-Ngan Nguyen-Thi, Tai Vo-Van
Summary: This paper proposes a technique to apply a metaheuristic optimization algorithm for solving the balance-driven automatic clustering problem of probability density functions (CDF). The proposed method can automatically determine the number of clusters and approximate the global optimal solution, considering both the clustering compactness and the clusters' size similarity. Experimental results on one-dimensional and multidimensional probability density functions demonstrate that the new method outperforms conventional techniques in providing higher quality clustering solutions.
INTERNATIONAL JOURNAL OF MACHINE LEARNING AND CYBERNETICS
(2023)
Article
Engineering, Multidisciplinary
Zing L. T. Tran, Tam T. Truong, T. Nguyen-Thoi
Summary: This study proposes a new method called DNN-DE, which combines deep neural networks (DNN) with differential evolution (DE), for optimizing the frequency of laminated functionally graded carbon nanotube (FG-CNT)-reinforced composite quadrilateral plates under free vibration. The DNN is used to predict the objective and constraints, replacing the time-consuming finite element analysis (FEA) procedures, while the DE acts as an optimizer. Numerical examples are provided to demonstrate the performance of the proposed method, and the results are compared with those obtained by other methods to verify its reliability and effectiveness. The study also investigates the influence of various parameters on the optimal results, such as boundary conditions, CNT volume fraction, and CNT distribution.
INTERNATIONAL JOURNAL OF COMPUTATIONAL METHODS
(2023)
Article
Engineering, Civil
D. Dinh-Cong, T. Nguyen-Thoi
Summary: This article proposes an optimization-based model updating technique for structural damage identification, considering limited noise-contaminated measurements and varying environmental conditions. The inverse problem is formulated as a constrained optimization problem, which is solved using a newly developed algorithm called Chaos Game Optimization (CGO). Numerical investigations demonstrate that the proposed technique accurately localizes and quantifies damage in metallic structures, even with incomplete and noisy data, but is significantly affected by ambient temperature variations in concrete structures.
Article
Engineering, Civil
Duy-Khuong Ly, Vinyas Mahesh, Chanachai Thongchom, T. Nguyen-Thoi
Summary: This study proposes an advanced cell-based smoothed discrete shear gap method (CS-DSG3) using zig-zag theory integrated with a hybrid control mechanism for analysis of smart damping control of laminated functionally graded carbon nanotube reinforced composite (FG-CNTRC) shell structures. The study successfully combines CS-DSG3 with zig-zag theory to provide an effective global-local numerical approach for analyzing the behavior of laminated FG-CNTRC shell structures.
THIN-WALLED STRUCTURES
(2023)
Article
Engineering, Civil
Quoc-Hoa Pham, Parviz Malekzadeh, Van Ke Tran, Trung Nguyen-Thoi
Summary: In this study, a two-node beam element enriched based on the Lagrange and Hermite interpolation function is proposed to solve the governing equation of a functionally graded porous (FGP) curved nanobeam on an elastic foundation in a hygro-thermo-magnetic environment. The material properties of curved nanobeams change continuously along the thickness via a power-law distribution, and the porosity distributions are described by an uneven porosity distribution.
FRONTIERS OF STRUCTURAL AND CIVIL ENGINEERING
(2023)
Article
Automation & Control Systems
Tam T. Truong, Jaehong Lee, T. Nguyen-Thoi
Summary: Most previous studies on damage detection in civil engineering structures have focused on either element damage detection or joint damage detection, separately. This study proposes an effective data-driven approach using an attention based convolutional gated recurrent unit network (ACGRU) for real-time damage detection of both joint and element in frame structures.
ENGINEERING APPLICATIONS OF ARTIFICIAL INTELLIGENCE
(2023)
Article
Construction & Building Technology
Nguyen-Minh Toan, Bui-Ngoc Tram, Jim Shiau, Tan Nguyen, Nguyen-Thoi Trung
Summary: This paper presents a novel approach for the stability evaluation of rectangular tunnels in undrained clay during lining process. By adopting isogeometric analysis and upper bound limit analysis, the tunnel geometry can be accurately represented using B-spline surfaces. The upper bound limit analysis is formulated as a second-order cone program, which can be solved using a numerical optimization algorithm. The proposed approach is validated and found to be accurate and reliable through comparisons with previous studies. Additionally, a deep learning model is trained to further enhance the accuracy and precision of the results.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Ngoc-Tu Do, Trung Thanh Tran, Trung Nguyen-Thoi, Quoc Hoa Pham
Summary: The main goal of this paper is to improve the mixed interpolation of tensorial components triangular (MITC3) by using the edge-based smoothed finite element method (ES-FEM), known as ES-MITC3, for analyzing the vibration of piezoelectric functionally graded porous (p-FGP) plates subjected to dynamic loading. The varying material properties of the FGP core through thickness with uneven porosity distribution are considered, as well as the linear relationship between electric potential and the thickness of the piezoelectric sublayer. A closed-loop control algorithm is used to actively control the vibration of p-FGP plates through feedback from displacement and velocity. The proposed method's performance is verified through comparative examples, and the authors hope it can be effectively applied to various smart material models and contribute to understanding texture control by piezoelectric materials through numerical results.
FORCES IN MECHANICS
(2023)
Article
Engineering, Multidisciplinary
Duy-Khuong Ly, Ho-Nam Vu, Chanachai Thongchom, Nguyen-Thoi Trung
Summary: This paper presents a novel numerical approach for nonlinear analysis and smart damping control in laminated functionally graded carbon nanotube reinforced magneto-electro-elastic (FG-CNTMEE) plate structures, taking into account multiple physical fields. The approach employs a multi-physical coupling isogeometric formulation to accurately capture the nonlinear strain-displacement relationship and the magneto-electro-elastic coupling properties. The smart constrained layer damping treatment is applied to achieve nonlinear damped responses. The formulation is transformed into the Laplace domain and converted back to the time domain through inverse techniques for smart control using viscoelastic materials.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2024)
Article
Mechanics
T. Nguyen-Thoi, Duy-Khuong Ly, S. Kattimani, Chanachai Thongchom
Summary: This article presents a novel numerical approach for modeling and analyzing smart constrained layer damping (SCLD) treatment in multilayer porous functionally graded graphene platelets-reinforced composite (PFG-GPRC) plates based on electromechanical coupling isogeometric analysis. The approach utilizes non-uniform rational B-splines (NURBS) basis functions to efficiently approximate the geometric, mechanical, and electric displacement fields. By integrating these basis functions with a zig-zag formulation, the approach can handle continuous/discontinuous material properties at interfaces and improve the effectiveness of global-local numerical solutions. The analysis considers different graphene platelet patterns and examines the impact of various parameters on the damping behavior of multilayer PFG-GPRC plates through parametric investigation.
Article
Mechanics
Quoc Hoa Pham, Trung Thanh Tran, Ashraf M. Zenkour, T. Nguyen-Thoi
Summary: This work studies the free vibration analysis and multi-objective optimization for L-shaped bi-functionally graded sandwich (L-BFGSW) plates. By using an effective finite element formulation and non-dominated sorting genetic algorithm, the optimal solution for the trade-off relationship between the maximum frequency and the minimum structural weight can be obtained.
COMPOSITE STRUCTURES
(2023)
Article
Mechanics
Alireza Enferadi, Majid Baniassadi, Mostafa Baghani
Summary: This study presents the design and analysis of an SMP microvalve, where the thermomechanical response of the SMP is investigated using a nonlinear constitutive model that incorporates hyperelasticity and viscoelasticity. The model accounts for fluid-solid interaction and heat transfer in both fluid and solid physics. Numerical simulations are carried out to examine the important characteristics of the SMP valve. The results demonstrate the significance of employing fluid-solid interaction conjugated heat transfer analysis for the efficient development of microvalves in diverse applications.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2024)
Article
Mechanics
Hridya P. Lal, B. R. Abhiram, Debraj Ghosh
Summary: Higher-order elasticity theories are used to model mechanics at the nanoscale, but the length-scale parameters in these theories need to be evaluated through experiments or MD simulations. This study shows that the length-scale parameter in the modified strain gradient theory varies with dimensions, boundary conditions, and deformation level for carbon and boron nitride nanotubes. To address this issue, a supervised ML-based framework is developed, combining MD simulations, continuum formulation, and ML to predict the length-scale parameter for a given material, dimension, and boundary condition. This predictive tool reduces the need for expensive MD simulations and opens up possibilities for applying non-classical continuum theories to nanoscale mechanics problems.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2024)
Article
Mechanics
Geng Chen, Shengzhen Xin, Lele Zhang, Min Chen, Christian Gebhardt
Summary: This paper develops a multiscale numerical approach to predict the failure probability of additive manufacturing (AM) structures subjected to time-varied loadings. The approach combines statistical homogenization, shakedown analyses, and reliability methods to consider the influence of microstructural features on load bearing capacity. Through case studies on exemplary structures and different material randomness assumptions, the robustness of the results is confirmed and the mechanism of how micropores influence structural reliability is explained.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2024)
Article
Mechanics
Guillaume Cadet, Manuel Paredes
Summary: This study proposes a comprehensive solution for calculating the stress field on the surface of a curved beam with a circular cross section, which is crucial for probabilistic fatigue life analysis.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2024)
Article
Mechanics
Hongshi Ruan, Xiaozhe Ju, Junjun Chen, Lihua Liang, Yangjian Xu
Summary: This paper proposes a data-driven approach to improve the efficiency of computational homogenization for nonlinear hyperelastic materials. By combining clustering analysis, Proper Orthogonal Decomposition (POD), and efficient sampling, a reduced order model is established to accurately predict elastoplasticity under monotonic loadings. The numerical results show a significant acceleration factor compared to a purely POD-based model, which greatly improves the applicability for structural analysis.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2024)
Article
Mechanics
Pep Espanol, Mark Thachuk, J. A. de la Torre
Summary: The motion of a rigid body, described by Euler's equations in Classical Mechanics, assumes that the distances between constituent particles are fixed. However, real bodies cannot meet this assumption due to thermal fluctuations. In order to incorporate dissipative and thermal fluctuation effects into the description, a generalization of Euler's equations is proposed. This theory explains the origin of these effects as internal, rather than caused by an external thermal bath, and derives the stochastic differential equations governing the body's orientation and central moments.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2024)
Article
Mechanics
Prateek Chandrakar, Narayan Sharma, Dipak Kumar Maiti
Summary: The current study focuses on the deterioration in thermal buckling performance of variable angle tow laminated (VATL) plates caused by damages in various composite and damage characteristics. Through numerical simulations and surrogate models, it was found that damages reduce the sensitivity of composite properties to buckling response, and a distinctive pattern of buckling response was observed when composite properties vary.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2024)
Article
Mechanics
Liangteng Guo, Shaoyu Zhao, Jie Yang, Sritawat Kitipornchai
Summary: This study introduces composites reinforced with graphene origami nanofillers into functionally graded multilayered phononic crystals. Numerical investigations reveal that these materials possess negative Poisson's ratio and offer unique mechanical properties, which can be tuned by adjusting the weight fraction and hydrogen coverage of the graphene fillers.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2024)
Article
Mechanics
Kai Li, Haiyang Wu, Yufeng Liu, Yuntong Dai, Yong Yu
Summary: This paper presents a novel self-oscillating liquid crystal elastomer fiber-beam system that can sway continuously and periodically under steady illumination. The governing equations of the system are established and the self-swaying process and motion mechanism are described in detail. Numerical results show the system undergoes supercritical Hopf bifurcation and the effects of system parameters on the self-swaying amplitude and frequency are discussed quantitatively.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2024)
Article
Mechanics
Lingkang Zhao, Peijun Wei, Yueqiu Li
Summary: This paper proposes a spatial-temporal fractional order model to study the dynamic behavior of thermoelastic nanoplates in a thermal environment. The model provides a flexible approach to describe the small-scale effects and complex history-dependent effects. Analytical and numerical methods verify the reliability of the model, and the effects of parameters on the dynamic response are discussed.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2024)
Article
Mechanics
A. N. O'Connor, P. G. Mongan, N. P. O'Dowd
Summary: This research presents an autonomous framework that combines Bayesian optimization and finite element analysis to identify ductile damage model parameters. The framework has been successfully applied to P91 material datasets and demonstrates the impact of algorithm hyperparameters on the resulting non-unique ductile damage parameters.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2024)
Article
Mechanics
S. V. Sorokin, S. Lenci
Summary: This paper reconsiders the nonlinear coupling between flexural and longitudinal vibrations of ideally straight elastic beams, using a nonlinear theory of curved beams and employing class-consistent boundary conditions. A paradoxical difference in the nonlinear parts of the Duffing equations obtained in the limit of vanishing curvature and in the case of an ideally straight beam is demonstrated and explained.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2024)
Article
Mechanics
C. Hari Manoj Simha
Summary: Dynamic Mode Decomposition (DMD) can be used to construct deformation fields for linear solids without making constitutive assumptions or knowing material properties. It operates on time-shifted data matrices and selects dominant modes using singular value decomposition. DMD can be used for reconstructing displacement states in elastic solids and identifying the onset of plasticity in elastic-plastic solids.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2024)
Article
Mechanics
C. Ren, K. F. Wang, B. L. Wang
Summary: An electromechanical model is established to investigate the characteristics of a bilayer structure consisting of a piezoelectric semiconductor film and an elastic substrate. The combined effects of piezoelectricity and flexoelectricity are considered, and closed-form expressions for the distributions of electron concentrations and relevant electromechanical fields are obtained. The effects of interfacial parameter, flexoelectricity, and initial carrier concentration are discussed. The research highlights the importance of the interfacial parameter and the weakening effect of flexoelectricity on the imperfect interface of the bilayer system.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2024)
Article
Mechanics
Yu Sun, Qiang Han, Chunlei Li
Summary: This paper presents the design of a tunable functionally graded metamaterial beam for flexural wave attenuation through the integration of a piezomagnetic shunt damping system and an inertial amplification mechanism. The proposed system demonstrates tunable and strong wave attenuation capability through local resonance and energy consumption. The theoretical and numerical results verify that the system can achieve significant wave attenuation at defined frequencies and also be optimized for maximal attenuation at various frequency ranges.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2024)
