Article
Engineering, Civil
Kanav Chadha, Vinyas Mahesh, Arjun Siddharth Mangalasseri, Vishwas Mahesh
Summary: This article introduces a lightweight vibration-based energy harvester (EH) constituted of multifunctional magneto-electro-elastic (MEE) facesheets and auxetic metamaterial core (AMC). The use of the auxetic core enhances the EH's performance, resulting in an almost 1.5 times higher power output compared to conventional metal-based energy harvesters. The auxetic-based EH also achieves a 22% weight reduction for the same power output. This research contributes to the utilization of multifunctional composites and metamaterials in complex engineering applications.
THIN-WALLED STRUCTURES
(2023)
Article
Chemistry, Physical
Philipp Metsch, Dirk Romeis, Karl A. Kalina, Alexander Rassloff, Marina Saphiannikova, Markus Kaestner
Summary: In this study, the magneto-mechanical coupling in magneto-active elastomers is investigated from two modeling perspectives: a micro-continuum and a particle-interaction approach, demonstrating their capabilities through representative examples. A systematic comparison of these approaches in a hybrid multiscale framework shows a remarkable agreement in model predictions, enhancing the understanding of interactions in magneto-active elastomers with chain-like microstructures.
Article
Materials Science, Multidisciplinary
Ryo Miyashita, Hiromasa Goto
Summary: A polyaniline composite was prepared by chemically polymerizing aniline in the cholesteric liquid crystal state of hydroxypropyl cellulose. The composite exhibited a helical structure of the main chain and demonstrated excellent catalytic and magnetic properties. It also showed promising redox properties, making it suitable for various applications.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Materials Science, Composites
Subrat Kumar Behera, Deepak Kumar, Chandra Shekhar Maurya, Somnath Sarangi
Summary: This study develops a novel class of coupled universal relations for electro-magneto-active polymeric composites under electromagnetic field interaction. It also proposes a theory that unifies pseudo transverse isotropy and rate-dependent phenomena in the context of particle reinforcement. Experimental investigations were conducted to confirm the applicability of the proposed universal relation.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Mechanics
Liming Zhou, Fangting Qu
Summary: Many engineering problems involve the coupling or interaction between different physics fields. In order to improve the efficiency and accuracy of calculations for magneto-electro-elastic materials in multiphysics fields, the MEE coupling isogeometric analysis method (MIGAM) is proposed. This method uses non-uniform rational B-spine (NURBS) functions for both geometric and analytical models, achieving seamless integration and ignoring mesh density effects. The MEE models, constructed using NURBS functions, are used to investigate the multiphysics coupling effects and static/dynamic responses under thermal and mechanical loading. Compared to the finite element method, MIGAM achieves higher efficiency by using fewer control points while maintaining sufficient accuracy for coupling multiphysics problems.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
Jalal Khaghanifard, Amir R. Askari, Mohsen Taghizadeh, Jan Awrejcewicz, Peter D. Folkow
Summary: This paper nonlinearly models cantilever-based functionally graded magneto-electro-elastic energy harvesters (FGMEEEH) for the first time. The coupled magneto-electro-mechanical model is obtained on the basis of the Euler-Bernoulli beam theory. A hybrid procedure including Ritz's method is then utilized to generate reduced order models for both asym-metric unimorph and symmetric bimorph configurations.
APPLIED MATHEMATICAL MODELLING
(2023)
Article
Engineering, Multidisciplinary
L. Sh Esayas, Subhaschandra Kattimani
Summary: This paper investigates the effect of porosity on active damping of geometrically nonlinear vibrations of functionally graded plates. The study analyzes the impact of factors such as porosity distribution, material gradation, and boundary conditions on the damping performance. The results demonstrate that porosity significantly influences the nonlinear behavior and damping performance of the graded plates.
DEFENCE TECHNOLOGY
(2022)
Article
Thermodynamics
Jian Yang, Bo Liu, Tiezhu Zhang, Jichao Hong, Hongxin Zhang
Summary: This paper proposes a novel mechatronics-electro-hydraulic power coupling electric vehicle (MEH-PCEV) and designs energy management strategies for its multiple energy sources system. The torque output anomaly issue is also addressed. The simulation results demonstrate that the proposed methods can enhance the stability of electric and total torque output, improve the efficiency of the motor operation, and reduce energy consumption.
Article
Mechanics
Aman Khurana, Deepak Kumar, Atul Kumar Sharma, M. M. Joglekar
Summary: This study presents the dynamic modeling and analysis of a smart actuator, using an energy-based model to predict its response and investigate the impact of particle reinforcement on dynamic oscillations. The findings show that particle reinforcement enhances the polymer, reduces deformation, decreases oscillation intensity, and increases excitation frequency.
JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
(2021)
Article
Engineering, Civil
Vinyas Mahesh
Summary: This article investigates the controlled nonlinear transient response of sandwich plates made of magnetoelectro-elastic (MEE) facesheets and agglomerated carbon nanotube (ACNT) core. The control is achieved by active constrained layer damping (ACLD) treatment. The proposed finite element (FE) model integrates the three-field coupling with the agglomeration and electromagnetic circuit effects, providing a valuable tool for the design of smart structures.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Civil
Vinyas Mahesh
Summary: This study investigates the controlled nonlinear transient response of sandwich plates made of magnetoelectro-elastic facesheets and agglomerated carbon nanotube core under active constrained layer damping treatment. The proposed FE model integrates the coupling of magnetic, electric, and elastic fields with agglomeration and electromagnetic circuit effects, providing an important tool for smart structure design.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Electrical & Electronic
Wenjie Feng, Wenbin Wu, Xin Yu Zhou, Wenquan Che, Yongrong Shi
Summary: This paper proposes a broadband high-efficiency quasi-Class-J power amplifier based on the nonlinear output capacitance effect, which increases output power and efficiency by increasing current magnitude, and can work in a wide frequency band.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2022)
Article
Mechanics
Aman Khurana, Deepak Kumar, Atul Kumar Sharma, Giuseppe Zurlo, M. M. Joglekar
Summary: Actuation devices made of smart polymers often face instabilities that can negatively impact their performance and lead to device failure. Wrinkling instability is commonly observed in smart polymers when subjected to electric or magnetic fields. Wrinkles can be both beneficial and detrimental, depending on the application. This study focuses on understanding the factors influencing thin films' pull-in and wrinkling instabilities and proposes a model to predict these instabilities based on electro-magneto-mechanical principles. The findings suggest that the level and direction of transverse isotropy can be modified to control the extent of pull-in and wrinkling instabilities.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2022)
Article
Materials Science, Multidisciplinary
Xiwen Fan, Yu Wang, Bochao Wang, Longjiang Shen, Jun Li, Zhenbang Xu, Sheng Wang, Xinglong Gong
Summary: This work introduces a novel magnetorheological polymer gel incorporated with carbon nanotubes and carbonyl iron particles, showcasing unusual nonlinear magneto-electro-mechanical responses. The high-performance sensing characteristics were observed due to low matrix viscosity and movable conductive paths formed by CNTs. Moreover, the rate-dependent electromechanical behavior was influenced by transient and mutable physical cross-linked bonds in the polymer gel, highlighting the potential for intelligent vibration controls in various applications.
FRONTIERS IN MATERIALS
(2021)
Article
Engineering, Civil
Chia-Wen Hsu, Chyanbin Hwu
Summary: This study focuses on the unsymmetric magnetic-electro-elastic (MEE) composite laminated thin plates, taking into account the coupling effects from mechanical, electric, and magnetic interactions as well as lamination sequence and anisotropic properties. By writing the governing partial differential equations in matrix form, explicit solutions are derived for two different boundary conditions. Some remarks on scaling and numerical calculation are provided to avoid ill-conditioned matrices.
THIN-WALLED STRUCTURES
(2022)
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)