Article
Engineering, Mechanical
Vinyas Mahesh
Summary: This research work investigates the nonlinear damped transient response of FG-CNTMEE shells using finite element methods, obtaining controlled response through ACLD treatment. Different forms of load cases and the influence of electro-magnetic boundary conditions are considered. The equations of motion are derived using the principle of virtual work, and solutions are obtained through condensation approach and direct-iterative method.
JOURNAL OF VIBRATION ENGINEERING & TECHNOLOGIES
(2022)
Article
Mechanics
Ya-Fei Zhao, Shun-Qi Zhang, Xiang Wang, Song-Yun Ma, Guo-Zhong Zhao, Zhan Kang
Summary: This article develops a geometrically nonlinear finite element formulation based on the first-order shear deformation hypothesis for static and dynamic analysis of carbon nanotube reinforced magneto-electro-elastic plates. It verifies the proposed model and studies the impact of different functionally graded patterns on reinforcement efficiency.
COMPOSITE STRUCTURES
(2022)
Article
Computer Science, Interdisciplinary Applications
Vinyas Mahesh, Dineshkumar Harursampath
Summary: This article proposes a finite-element formulation based on higher order shear deformation theory (HSDT) to evaluate the nonlinear frequency characteristics of carbon nanotube reinforced magneto-electro-elastic (CNTMEE) plates. The effects of electro-magnetic circuits on the nonlinear coupled behavior of CNTMEE plates are investigated for the first time in the literature. The study reveals the influence of coupling fields on the nonlinear frequency response of CNTMEE plates by considering different forms of CNT distributions and adjusting parameters.
ENGINEERING WITH COMPUTERS
(2022)
Article
Materials Science, Multidisciplinary
Vinyas Mahesh, Dineshkumar Harursampath
Summary: In this article, the nonlinear deflection problem of magneto-electro-elastic shells reinforced with carbon nanotubes under multiphysics loads is addressed. A mathematical model based on higher-order shell theory is derived, and the influence of coupling fields and various parameters on the deflection is studied. The findings provide valuable insights for aerospace research and development.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Vinyas Mahesh
Summary: This article presents a higher-order nonlinear finite element formulation to evaluate the nonlinear deformation of functionally graded magneto-electro-elastic porous shells under the influence of electro-magnetic and mechanical loads. Different gradients, porosity distributions, and electromagnetic loads are analyzed for their effects on the nonlinear central deflection of FG-MEEP shells, with attention paid to distinguishing structural responses at fully coupled and uncoupled states.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Computer Science, Interdisciplinary Applications
Vinyas Mahesh, Dineshkumar Harursampath
Summary: This study evaluates the large/nonlinear deflection of functionally graded magneto-electro-elastic porous flat panels, considering geometric skewness and under combined mechanical, electrical, and magnetic loads. Mathematical formulation is derived using higher order shear deformation theory and von-Karman's geometric nonlinearity with finite element method (FEM). The analysis investigates the effect of key parameters such as skew angle, porosity distribution, gradient index, porosity volume, functionally graded pattern, and electromagnetic loads on the deflection of FG-MEEP flat panels, while also assessing the degree of coupling associated with these parameters.
ENGINEERING WITH COMPUTERS
(2022)
Article
Mechanics
Liming Zhou, Jiye Wang, Mingrui Liu, Ming Li, Yingbin Chai
Summary: The study employs the enriched finite element method (EFEM) to solve the transient dynamics of Magneto-electro-elastic (MEE) intelligent structures, demonstrating their characteristics with the implicit Newmark integration method. The EFEM enhances traditional FEM shape functions with interpolation cover functions to capture higher gradients of field variables and smooth out inter-element stress jumps. Results show a good agreement with analytical results and illustrate the superior abilities of EFEM in handling multi-physical coupling problems compared to traditional FEM.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Liming Zhou, Yan Gao
Summary: Magneto-electro-elastic (MEE) composites have promising application prospects due to their rapid response to external electric or magnetic fields. The enriched finite element method (EFEM) is an improved version of the standard finite element method (FEM) that can effectively solve the multi-physics coupling issues in MEE-based structures. The mechanical-electro-magnetic coupling enriched finite element method (MEM-EFEM) was proposed specifically for the complex coupling mechanism in MEE-based structures, and it outperforms the regular FEM in terms of convergence, accuracy, and element usage.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
M. Vinyas, D. Harursampath, S. C. Kattimani
Summary: This article evaluates the frequency response of FG-CNTMEE plates under different circuit conditions using finite element formulation and HSDT, achieving good convergence and accuracy. Various parameters' effects on the plate are considered for the first time, providing a benchmark for future development and analysis of smart structures.
DEFENCE TECHNOLOGY
(2021)
Article
Mechanics
Zheng Gong, Yinxiao Zhang, Ernian Pan, Chao Zhang
Summary: In this work, the concentration and distribution of field along the wall of elliptic holes in anisotropic magneto-electro-elastic (MEE) materials were systematically analyzed using a three-dimensional finite-element formulation implemented in COMSOL software. The proposed model was validated and applied to the design of multiferroic composites with an open hole. The distribution of stress and influence of hole shape, plate thickness, and stacking sequence were investigated.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2023)
Review
Mechanics
Cherif Othmani, He Zhang, Chaofeng Lue, Yan Qing Wang, Ali Reza Kamali
Summary: The growing usage of elastic, piezoelectric and magneto-electro-elastic composites has led to the development of new numerical methods for predicting dynamic responses. Orthogonal polynomial expansions are suitable for predicting acoustic wave dispersion curves, but may not be effective for structures with significant differences in constituent properties.
COMPOSITE STRUCTURES
(2022)
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
Mechanics
Kiran Madrahalli Chidanandamurthy, Wei Wang, Cheng Fang, Subhaschandra Kattimani
Summary: In this article, a new mathematical model is proposed to develop a porous skew partially functionally graded magneto-electro-elastic plate. The model combines stepped functionally grade plates and modified power law approximation. The study investigates the influence of various factors, such as partial gradation, porosity distribution, porosity volume, and skew angle, on the natural frequency and mechanical behavior of the plate.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Engineering, Mechanical
Ye Tang, Tao Wang, Zhi-Sai Ma, Tianzhi Yang
Summary: A novel magneto-electro-elastic model of bi-directional functionally graded materials beams is developed to investigate nonlinear dynamics, showing that asymmetric modes induced by 2D FGMs significantly impact nonlinear responses. The influences of material distributions, length-thickness ratio, electric voltage, magnetic potential, and boundary conditions on nonlinear resonant frequency and response amplitude are discussed, highlighting the potential for accurate design of multi-ferroic composite structures through adjustments in material properties.
NONLINEAR DYNAMICS
(2021)
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
Materials Science, Composites
Vishwas Mahesh, Vinyas Mahesh, Sharnappa Joladarashi, S. M. Kulkarni
Summary: The use of laboratory testing is important in evaluating the abrasion resistance of flexible reinforcement materials in armor and car structural components. This study examines the wear of compliant composites made of woven jute fabric and natural rubber under two- and three-body conditions and identifies different wear mechanisms.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2023)
Article
Materials Science, Composites
Vinyas Mahesh, Prasad G. Maladkar, Gangu S. S. Sadaram, Athul Joseph, Vishwas Mahesh, Dineshkumar Harursampath
Summary: Besides their anomalous behavior under tensile and compressive structures, auxetic structures have improved energy absorption characteristics that are highly desirable across different fields of study. This paper focuses on characterizing the compressive behavior and negative Poisson's ratio (NPR) of auxetic structures fabricated using additive manufacturing techniques and polymer nanocomposite materials. The study uses glycol-modified polyethylene terephthalate (PETG) and PETG nanocomposites filled with organically modified montmorillonite (OMMT) nanoclay particles to produce auxetic structures using fused filament fabrication (FFF). The compressive performance of different structures is evaluated through mechanical testing and digital image correlation (DIC), considering parameters such as crushing strength, NPR, and energy absorption. The results indicate that higher concentrations of nanoclay particles decrease the compressive strength and that NPR decreases with increasing strain rates. The study also highlights the influence of composition and structure geometry on the strain energy absorption. Aerospace applications can benefit from these high-performance material-structure combinations.
JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS
(2023)
Article
Engineering, Mechanical
Vishwas Mahesh, Vinyas Mahesh, J. N. Tejaswini, J. Deekshitha, P. Gunashree, G. Ramyashree
Summary: This study focuses on the development of polymer matrix composites filled with waste rubber crumb for tribological applications. The results show that the addition of rubber crumb greatly improves the abrasion resistance of the composites.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2023)
Article
Engineering, Mechanical
Vishwas Mahesh, Vinyas Mahesh, Dineshkumar Harursampath
Summary: The current study investigates the mechanical performance of hybrid composites and how it is affected by the composition, arrangement, and sequencing of fibers. Four distinct hybrid composites were created using a hand-layup approach, with varying stacking sequences of jute, coir, and carbon fibers. It was found that adding carbon fibers to the core and skin enhanced the mechanical properties of the composites. The fractography of the composites was also studied using a scanning electron microscope.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2023)
Article
Engineering, Mechanical
Vinyas Mahesh
Summary: This study investigates the impact of auxeticity synergised with the pyro-coupling behavior of multiphase magneto-electro-elastic (M-MEE) composites using finite element analysis. The nonlinear deflection and bending of sandwich plates with auxetic core and M-MEE skins under multi-physics load are examined. Parametric studies reveal that the plate deflection and bending behavior are significantly influenced by the auxetic cell dimensions and electro-magnetic loads. The integrated effects of auxeticity and pyro-coupling are not yet reported in the open literature and can serve as a future reference.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2023)
Article
Mechanics
Hukum Chand Dewangan, Subrata Kumar Panda, Nitin Sharma, Samy Refahy Mahmoud, Dineshkumar Harursampath, Vinyas Mahesh
Summary: This work presents a numerical modeling study on the static large-deformation behavior of multilayered flat/curved panels with cutouts under thermo-mechanical load. The numerical model incorporates third order displacement polynomials and two nonlinear strains (Green-Lagrange and von-Karman) to capture the large-deformation characteristic of the panel. The governing equation is formulated using Hamilton's principle and solved using the selective integration scheme and Picard's direct iterative method.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2023)
Article
Polymer Science
Vinyas Mahesh
Summary: The current study integrates artificial neural network (ANN) with experimentation to assess the wear properties of glycol-modified polyethylene terephthalate (PETG) composites reinforced with organically modified montmorillonite (OMMT) nanoclay. The results show that adding 3% weight percentage of OMMT nanoclay improves the wear properties of the composites, with mild wear compared to virgin PETG. The developed ANN model accurately predicts the tribological performance of PETG/OMMT composites, reducing the need for expensive experimentation and analysis. These composites may find applications in the prosthetic, aerospace, and automobile industries.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
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
Mechanics
Chetna Srivastava, Vinyas Mahesh, Pandi Pitchai, P. J. Guruprasad, Nik Petrinic, Fabrizio Scarpa, Dineshkumar Harursampath, Sathiskumar A. Ponnusami
Summary: The variational asymptotic method (VAM) is used to determine the equivalent elastic stiffness tensor of auxetic materials for the first time. The VAM allows rotational degrees-of-freedom of the structural elements without any assumptions. The homogenized response of the unit cells is fully anisotropic, with specific possible responses of orthotropy or transverse isotropy depending on the arrangement of structural elements. The predictions of the VAM-based method are validated using commercial finite element software and open literature, demonstrating its versatility and computational efficiency in describing auxetic metamaterials.
JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
(2023)
Article
Materials Science, Multidisciplinary
Virendra Pratap Singh, Ashish Kumar, Rajan Kumar, Anchit Modi, Deepak Kumar, Vinyas Mahesh, Basil Kuriachen
Summary: A comprehensive study was conducted on the behaviour of an AA6061-T6 alloy joint through friction stir welding. The investigation focused on the relationship between microstructure and strength in the joint under different processing parameters. Multiple techniques such as SEM, XRD, optical microscopy, and EDS were used to explore intermetallic compounds and their phases, as well as mechanical properties like tensile strength, hardness, and residual stress. The findings revealed the evolution of grain boundaries and the presence of second-phase particles. It was observed that a rotational speed of 800 rpm resulted in improved hardness, tensile strength, and flexural strength.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Materials Science, Composites
Vinyas Mahesh, Jerin P. George, Vishwas Mahesh, Himadree Chakraborthy, Sriram Mukunda, Sathiskumar Anusuya Ponnusami
Summary: This article investigates the synergistic effect of organically modified montmorillonite (OMMT) nanoclay and short carbon fibers (SCFs) on the tribological behavior of additively manufactured Polyethylene Terephthalate Glycol (PETG) nanocomposites. The specific wear rate (SWR) and coefficient of friction (CoF) of the nanocomposites were assessed through dry-sliding wear tests. An artificial neural network (ANN) methodology was proposed to accurately predict the wear performance of PETG nanocomposites. The proposed ANN methodology showed agreeable accuracy in predicting SWR and CoF, leading to reduced experimentation costs and time.
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
(2023)
Article
Engineering, Mechanical
Nithin U. Aithal, Vishwas Mahesh, Vinyas Mahesh, Sathiskumar Anusuya Ponnusami, Dineshkumar Harursampath
Summary: This study explores the potential uses and challenges associated with cenosphere, a waste product from coal combustion. By adding cenosphere as a filler to carbon fiber-reinforced polymer sandwich composites, the mechanical properties of the composite materials, including tensile strength, flexural strength, interlaminar shear strength, and impact strength, can be significantly enhanced.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2023)
Article
Nanoscience & Nanotechnology
Arjun Siddharth Mangalasseri, Vinyas Mahesh, Sriram Mukunda, Vishwas Mahesh, Sathiskumar A. Ponnusami, Dineshkumar Harursampath, Abdelouahed Tounsi
Summary: This article investigates the energy harvesting characteristics of a magneto-electro-elastic (MEE) cantilever beam reinforced with carbon nanotubes (CNT) under transverse vibration using a lumped parameter model. The influence of various factors on the energy harvesting behavior is thoroughly discussed, including the distribution and volume fraction of CNT, substrate material, and thickness ratios. The article aims to explore the behavior of smart materials reinforced with carbon nanotubes for energy harvesting applications.
ADVANCES IN NANO RESEARCH
(2023)
Article
Materials Science, Composites
Vinyas Mahesh
Summary: The acoustic properties of 3D printed PETG nanocomposites were experimentally investigated and an artificial neural network-based prediction methodology was developed. The results showed that higher weight percentages of nanoclay and carbon fibers had a beneficial effect on sound absorption.
POLYMER COMPOSITES
(2023)
Article
Materials Science, Multidisciplinary
Virendra Pratap Singh, Deepak Kumar, Vinyas Mahesh, Dineshkumar Harursampath, Basil Kuriachen
Summary: The nano-scale tribological behavior of a Colmonoy 6 coating deposited over SS304 steel using plasma transferred arc (PTA) cladding technique was studied. The presence of second phases in the coating contributed to both dispersion and solid solution strengthening. Despite being harder than the substrate, the coating showed increased wear and friction due to its high interfacial shear strength.
