Article
Engineering, Mechanical
A. Ghorbanpour Arani, S. A. Jamali
Summary: This research investigates the vibration analysis of a cylindrically curved sandwich plate rested on Winkler-Pasternak foundation, deriving constitutive equations for different layers and proposing an analytical approach to solve the coupled equations. It is observed that increasing the volume fraction of carbon nanotubes in face sheets enhances the stability of the electro-rheological sandwich plate, which can be utilized in designing smart structures in various fields such as military, aviation, marine, and automotive industries.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Mechanics
V Kumar, S. J. Singh, V. H. Saran, S. P. Harsha
Summary: This paper presents a study on the free vibration analysis of tapered Functionally Graded Material (FGM) plates, using FSDT and HSDT models for comparison, with the finding that the Pasternak foundation effect dominates over the Winkler foundation. The governing equations are obtained through Hamilton's principle, and solutions are derived using the Galerkin-Vlasov method.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2021)
Article
Mechanics
C. Chr Koutsoumaris, K. G. Eptaimeros
Summary: This study explores the analysis of static engineering problems of a nanobeam using nonlocal integral elasticity models. The results show that the integral models exhibit a flexible behavior compared to classic and nonlocal differential models, demonstrating good physical robustness and promising applications in the field of nanomaterials and beyond.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2021)
Article
Mathematics, Applied
Pei Zhang, P. Schiavone, Hai Qing
Summary: A nonlocal study of vibration responses of FG beams supported by a viscoelastic Winkler-Pasternak foundation is conducted, considering the damping responses of both the Winkler and Pasternak layers of the foundation. The bending deformation of the beams and the elastic and damping responses of the foundation are comprehensively considered by uniting differential formulations of strain-driven and stress-driven two-phase local/nonlocal integral models, addressing the stiffness softening and toughening effects. The GDQM is used to solve the complex eigenvalue problem, and benchmark results for vibration frequency are obtained.
APPLIED MATHEMATICS AND MECHANICS-ENGLISH EDITION
(2023)
Article
Mechanics
Ahmed Amine Daikh, Mohamed-Ouejdi Belarbi, Abdelhak Khechai, Li Li, Hani M. Ahmed, Mohamed A. Eltaher
Summary: This paper proposes a new nanoplate model to characterize the buckling behavior of bilayer FG porous plates, which can consider both geometric and physical effects. Materials are graded continuously using a power law function. Two types of coated FG plates, Hardcore and Softcore FG plates, are investigated. Based on the generalized field of displacement, a Quasi-3D higher-order shear deformation plate theory is proposed, reducing the number of variables. The proposed solution is validated and is in good agreement with existing literature.
Article
Mechanics
Pei Zhang, Peter Schiavone, Hai Qing
Summary: This article presents a hygro-thermal-damping vibration analysis of two-variable shear deformation beams supported by a visco-Pasternak foundation. The effects of simultaneously applying stress-driven nonlocal assumptions on the foundation and hygro-thermal load in the undamped and damping vibration of the shear deformation beams are examined.
COMPOSITE STRUCTURES
(2023)
Article
Engineering, Mechanical
Nikola Nesic, Milan Cajic, Danilo Karlicic, Aleksandar Obradovic, Julijana Simonovic
Summary: This paper investigates the nonlinear dynamic behavior of a nonlocal functionally graded Euler-Bernoulli beam resting on a fractional visco-Pasternak foundation and subjected to harmonic loads. The proposed model captures both the elastic stress gradient field considering the nonlocal parameter and the strain gradient stress field considering the material length scale parameter. The study demonstrates that the application of the incremental harmonic balance method in analyzing nonlocal strain gradient theory-based structures can lead to more reliable studies for strongly nonlinear systems.
NONLINEAR DYNAMICS
(2022)
Article
Thermodynamics
Quoc-Hoa Pham, Van Ke Tran, Trung Thanh Tran, Trung Nguyen-Thoi, Phu-Cuong Nguyen, Van Dong Pham
Summary: This article presents a finite element method based on a quasi-3D nonlocal theory to study the free vibration of functionally graded material nanoplates on an elastic foundation in a thermal environment. The study compares numerical results with previous research to verify accuracy and investigates the effects of various parameters on the free vibration of nanoplates.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Engineering, Mechanical
S. J. Singh, S. P. Harsha
Summary: The paper investigates the impact of porosity on vibration and buckling responses of sandwich plates supported with different boundary conditions, using a new modified sigmoid function based functionally graded material plate. Different types of porosity and plate configurations are considered, revealing significant effects on the plate's vibration and buckling responses.
JOURNAL OF SANDWICH STRUCTURES & MATERIALS
(2021)
Article
Mechanics
H. M. Numanoglu, H. Ersoy, O. Civalek, A. J. M. Ferreira
Summary: This article examines the free thermal vibration analysis of nanobeams surrounded by an elastic matrix using nonlocal elasticity and Timoshenko beam theories. The equation of motion for free vibration is solved by analytical method, and a weighted residue-based finite element formulation is developed for boundary conditions other than simply supported nano beams. Numerical results show the high accuracy of the nonlocal finite element formulation and the effects of size dependency and environmental factors on the dynamic behavior of nanobeams are discussed in detail.
COMPOSITE STRUCTURES
(2021)
Article
Physics, Multidisciplinary
Hadi Babaei, M. Reza Eslami
Summary: A nonlocal strain gradient theory is developed for studying large amplitude vibrations of arches made of functionally graded porous material. Various models, including Reddy's third-order model, Timoshenko's first-order model, and the classical Euler-Bernoulli model, are analyzed in the study. Parametric studies are conducted to investigate the effects of different parameters on the frequencies of FG porous arches.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Mechanics
S. Adhikari, D. Karlicic, X. Liu
Summary: The research investigates the free and forced bending vibration of damped nonlocal nano-beams on an elastic foundation, considering two types of nonlocal damping models. A frequency-dependent dynamic finite element method is developed to analyze the forced vibration response. The study reveals that the dynamic stiffness matrix can be defined by six unique coefficients and reduces to well-known special cases under different conditions, with a numerical algorithm suggested for extracting eigenvalues in the undamped case.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2021)
Article
Engineering, Civil
Ashraf M. Zenkour
Summary: In this study, the thermal vibrational behavior of a nanoplate placed on a three-factor foundation is investigated using nonlocal elasticity and Mindlin's first-order shear deformation plate theory. A three-parameter viscoelastic model is obtained by connecting the Winkler-Pasternak elastic foundation with viscous damping. The differential equations of motion are derived and solved to obtain the natural frequencies of simply-supported nanoplates. The influences of the nonlocal index, viscous damping index, and temperature changes are investigated. Additional thermal vibration results of nanoplates resting on the viscoelastic foundation are presented for future comparisons.
STRUCTURAL ENGINEERING AND MECHANICS
(2022)
Article
Materials Science, Multidisciplinary
Ashraf M. Zenkour, Hela D. El-Shahrany
Summary: This study investigates the controlled motion of viscoelastic/fiber-reinforced/magnetostrictive/sandwich plates supported by visco-Pasternak foundations. The authors derive the governing dynamic system using Hamilton's principle and utilize a feedback control system to control the structural vibration. Numerical outcomes indicate that increasing the thickness ratio of the viscoelastic layer to the magnetostrictive layer improves system vibration control.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Engineering, Civil
V. Kumar, S. J. Singh, V. H. Saran, S. P. Harsha
Summary: This work investigates the buckling response of a porous plate made of functionally graded materials. It considers a tapered FGM plate under uniaxial and biaxial loading with various boundary conditions. The effects of Pasternak foundation and different porosity patterns on the buckling response are studied. The study utilizes the first order-shear deformation theory and the Galerkin's-Vlasov method to derive the effective equations of motion for buckling analysis.
Article
Engineering, Civil
Ehsan Arshid, Hossein Arshid, Saeed Amir, S. Behnam Mousavi
Summary: This study investigated the performance of porous sandwich structures with different numbers of layers, considering factors such as thermal environment effects, functionally graded materials, and carbon nanotube-reinforced composites. The results showed that increasing the central opening angle can reduce natural frequencies and critical buckling loads, increasing the porosity coefficient will decrease these values, but increasing the CNTs content will have the opposite effect.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2021)
Article
Engineering, Aerospace
Ehsan Arshid, Saeed Amir, Abbas Loghman
Summary: This study presents thermal buckling analysis of annular/circular microplates made from functionally graded Graphene nanoplatelets (GNPs) reinforced porous nanocomposite. Increasing the weight fraction of GNPs reduces buckling results, while increasing the porosity coefficient improves thermal buckling behavior. These findings can serve as a benchmark for future studies.
AEROSPACE SCIENCE AND TECHNOLOGY
(2021)
Article
Computer Science, Interdisciplinary Applications
Ehsan Arshid, Mohammad Khorasani, Zeinab Soleimani-Javid, Saeed Amir, Abdelouahed Tounsi
Summary: The study investigated the vibrational behavior of a three-layered sandwich microplate with functionally graded porous materials as core and piezoelectric nanocomposite materials as face sheets. By reinforcing the face sheets with carbon nanotubes, their properties can be changed, and equations of motion can be derived using innovative theoretical methods. Results show that an increase in CNTs' volume fraction improves mechanical properties and natural frequency, while the hygrothermal environment also has significant effects on the results.
ENGINEERING WITH COMPUTERS
(2022)
Article
Engineering, Multidisciplinary
Zeinab Soleimani-Javid, Ehsan Arshid, Saeed Amir, Mahdi Bodaghi
Summary: This study analyzes the free vibration behavior of functionally graded saturated porous micro cylindrical shells with two nanocomposite skins and investigates the effects of different parameters on the natural frequencies.
DEFENCE TECHNOLOGY
(2022)
Article
Engineering, Aerospace
Ehsan Arshid, Zeinab Soleimani-Javid, Saeed Amir, Nguyen Dinh Duc
Summary: This study investigates the vibrational behavior of three-layered cylindrical shells with graphene nanoplatelets (GNPs)-reinforced composite core and piezo-electro-magnetic (PEM) face sheets, providing theoretical support for the design and manufacture of more efficient engineering structures.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Mechanics
Zahra Khoddami Maraghi, Saeed Amir, Ehsan Arshid
Summary: This paper investigates the vibration and instability of a sandwich circular plate composed of Magnetorheological fluid core and Magnetostrictive face sheets. The energy method and Hamilton principle are used to derive the governing equations, and the natural frequency is calculated using the differential quadrature method. The study explores the impact of important parameters such as load factor, elastic modulus, shear layer, magnetic field intensity, and boundary conditions on the natural frequency of structures. The results demonstrate that varying load leads to flutter-type instability in the first two vibrational modes.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Mechanics
Ehsan Arshid, Saeed Amir, Abbas Loghman
Summary: This study investigates the vibrational behavior of a functionally graded graphene nanoplatelets-reinforced porous nanocomposite (FG GNPs-RPN) annular microplate with piezoelectric/metallic coverings under asymmetric conditions. The microstructure is located on a Kerr elastic substrate and is in a thermoelectrical media. Various core properties are considered using Gaussian random field scheme, Halpin-Tsai, and extended rule of mixture models. The results show that adding GNPs enhances the frequencies by about 20-28%, while increasing porosity up to seventy percent leads to a decrease in frequencies by about 8-15%. The proposed model can be used to advance knowledge and future applications in various industries.
Article
Engineering, Civil
Ehsan Arshid, Saeed Amir, Abbas Loghman
Summary: This study investigates the application of reinforcing metal foam structures with nano-fillers in terms of vibration characteristics. Carbon nanotubes and graphene nanoplatelets are selected as the fillers and dispersed in different patterns, affecting the mechanical properties of the structure. Natural frequencies and mode shapes are obtained using various theories and methods, and the results are validated.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Ehsan Arshid, Mohammad Amin Ghorbani, Mohammad Javad Momeni Nia, Oemer Civalek, Abhinav Kumar
Summary: This paper investigates the thermo-mechanical buckling performance of three-layered advanced fluid-infiltrated porous shells embedded between two GPLs-reinforced composite layers. The influence of fluids in the pores is studied using Skempton coefficient. Imperfection types and ratio effects are also considered. Furthermore, the weight fraction and dispersion patterns of Graphene nanoplatelets (GPLs) for the face layers are studied. After deriving the governing equations using virtual displacement method, they are analytically solved via Navier's approach. Finally, the impact of different factors on the critical buckling loads (CBLs) and temperatures (CBTs) of cylindrical, spherical, and doubly-curved shells is assessed.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
Ehsan Arshid, Mohammad Javad Momeni Nia, Mohammad Amin Ghorbani, Omer Civalek, Abhinav Kumar
Summary: This research explores the poro-thermoelastic frequency analysis of three-layer functionally graded saturated porous lightweight shells covered with graphene nanoplatelets-reinforced composite surfaces. The effects of volume fraction and diffusion types of graphene nanoplatelets reinforcement, as well as pressure exerted by fluids and pore arrangements, are investigated. The equations of motion derived based on the first-order shear deformation theory and Hamilton's principle are solved analytically. The frequencies for different types of shells are presented, providing useful information for various industries and serving as a benchmark for future studies.
APPLIED MATHEMATICAL MODELLING
(2023)
Article
Engineering, Civil
Khaled Alhaifi, Ahmad Reza Khorshidvand, Murtadha M. Al-Masoudy, Ehsan Arshid, Seyed Hossein Madani
Summary: This paper investigates the influence of porosity distributions on the buckling and post-buckling behaviors of a functionally graded saturated porous circular plate. The plate is subjected to uniformly distributed radial loading and is supported by simply supported and clamped boundary conditions. The effects of poroelastic material parameters, boundary conditions, and thickness change on the post-buckling behavior of the plate are analyzed in detail. The results indicate that the buckling and post-buckling behaviors in the monotonous and symmetric cases differ from the asymmetric case, mainly due to the asymmetric distribution of elastic moduli.
STRUCTURAL ENGINEERING AND MECHANICS
(2023)
Article
Engineering, Civil
Javad Kargar, Ali Ghorbanpour Arani, Ehsan Arshid, Mohsen Irani Rahaghi
Summary: The study investigates the free vibration of a spherical panel with a magnetorheological fluids core and magneto-electro-elastic face sheets. By using FSDT and Hamilton's principle, the motion equations are extracted and solved using Navier's method. The effects of parameters such as magnetic field intensity, loss factor, multi-physical loads, types of elastic medium, geometric properties of the panel, and different material types for the face sheets on the results are considered and discussed.
STRUCTURAL ENGINEERING AND MECHANICS
(2021)
