Article
Mechanics
Aria Ghabussi, Negin Ashrafi, Aghil Shavalipour, Abolfazl Hosseinpour, Mostafa Habibi, Hossein Moayedi, Behzad Babaei, Hamed Safarpour
Summary: The study investigates the vibrational characteristics of a cylindrical nanoshell reinforced by graphene nanoplatelets, coupled with a piezoelectric actuator, and embedded in a viscoelastic medium. The material properties of the graphene-reinforced composite are assumed to be graded in the thickness direction and analyzed using a nanomechanical model. Various factors, such as the viscoelastic foundation, piezoelectric layer, and graphene distribution pattern, are found to play important roles in the frequency characteristics of the nanoshell, providing useful insights for the design of materials science and nano-electromechanical systems.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2021)
Article
Engineering, Civil
Xiujuan Liang, Haixu Ji
Summary: The research in this paper focuses on the dynamic stability analysis of a graphene nanoplatelets (GPLs) reinforced composite spinning disk. The study employs a mixture rule and a modified Halpin-Tsai model, and utilizes the principle of Hamilton to determine the boundary conditions, ultimately solved using GDQM.
GEOMECHANICS AND ENGINEERING
(2021)
Article
Computer Science, Interdisciplinary Applications
P. Phung-Van, H. Nguyen-Xuan, Chien H. Thai
Summary: This paper investigates the free vibration analysis of functionally graded graphene platelet-reinforced composites (FG GPLRC) plates using a nonlocal strain gradient isogeometric model based on the higher order shear deformation theory. Various distributed patterns of graphene platelets (GPLs) are considered, and the effects of different parameters on the natural frequencies of the nanoplates are examined. The results obtained in this study can serve as benchmark results for further research on FG GPLRC nanoplates.
ENGINEERING WITH COMPUTERS
(2023)
Article
Mechanics
Ming Jin
Summary: This study presents, for the first time, the motion limiting nonlinear dynamics and frequency analysis of a nanopipe reinforced with carbon nanotube agglomerations (CNTAs). The nanopipe is coupled with a piezoelectric actuator, and the FSDT and NSGT theories are used to consider displacement fields and size effects. The nonlinear equations are solved using the GDQM and MSSP methods. The outcomes show that the area ratio of the piezoelectric layer, CNTs' volume fraction, boundary conditions, and size-dependent parameter play a significant role in the nonlinear dynamics of the composite nanopipes.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Computer Science, Interdisciplinary Applications
Farshid Allahkarami
Summary: This paper investigates the dynamic stability and parametric effects on functionally graded nanocomposite annular plate subjected to a periodic radial compressive load in thermal environment. The fundamental natural frequencies are calculated using a proposed model and compared with literature results to validate the accuracy.
ENGINEERING WITH COMPUTERS
(2022)
Article
Mechanics
Mostafa Habibi, Alireza Mohammadi, Hamed Safarpour, Aghil Shavalipour, Majid Ghadiri
Summary: This study investigated the wave propagation characteristics of a size-dependent laminated composite nanostructure coupled with a piezoelectric actuator. By conducting a parametric study, it was found that the ply angle plays a significant role in phase velocity changes when increasing the wave number, while an increase in piezoelectric actuator thickness leads to a higher critical value of external voltage and enhanced stability of the composite nanostructure coupled with the actuator.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2021)
Article
Computer Science, Interdisciplinary Applications
Alireza Gholipour, Mergen H. Ghayesh, Shahid Hussain
Summary: In this article, a coupled continuum viscoelastic model for Timoshenko nonlocal strain gradient theory-based nanobeams is developed and solved using a finite difference analysis. The model incorporates the viscosity of the nanobeams and considers the ultrasmall size influences and rotary inertia. The energy dissipation is formulated via negative work and the coupled continuum viscoelastic dynamic model is solved using a finite difference analysis for nonlinear mechanics.
ENGINEERING WITH COMPUTERS
(2022)
Article
Engineering, Civil
Mohammadreza Ramezani, Mohammad Rezaiee-Pajand, Francesco Tornabene
Summary: A new analytical approach to the nonlinear analysis of functionally graded graphene platelet reinforced composite laminated cylindrical shells is presented. The approach is based on the higher-order shear deformation theory and the principle of virtual work. The method is validated through parametric studies and stress analysis.
THIN-WALLED STRUCTURES
(2022)
Article
Materials Science, Composites
Yan Yuan, Zhiqiang Niu, John Smitt
Summary: This paper studies the vibration analysis of viscoelastic nanobeams reinforced with functionally graded carbon nanotubes subjected to magneto-hygro-thermo loading, taking into account the thickness stretching effect. The frequency of the nanobeams is analyzed considering the effects of size effect parameters, elastic foundation factors, distributions of carbon nanotubes, hygrothermal environment, and viscoelastic parameter.
ADVANCED COMPOSITE MATERIALS
(2023)
Article
Engineering, Civil
Mohammadreza Ramezani, Mohammad Rezaiee-Pajand, Francesco Tornabene
Summary: This paper presents a new analytical approach for the nonlinear analysis of functionally graded graphene platelet re-inforced composite laminated cylindrical shells under external pressure and thermal environment. The method is based on higher-order shear deformation theory and natural strain cover functions, with consideration of temperature-dependent thermomechanical properties of the composite laminated shells.
THIN-WALLED STRUCTURES
(2022)
Article
Computer Science, Interdisciplinary Applications
M. S. H. Al-Furjan, Hamed Safarpour, Mostafa Habibi, Mehran Safarpour, Abdelouahed Tounsi
Summary: This study focuses on the buckling temperature and post-buckling analysis of a functionally graded graphene nanoplatelet-reinforced composite (FG-GPLRC) disk surrounded by a nonlinear elastic foundation and covered with a piezoelectric actuator. The results demonstrate the significant impact of various factors such as radius ratio, GPLs parameters, elastic foundation, applied voltage, and piezoelectric thickness on the thermal post-buckling response of the FG-GPLRC disk. Additionally, the presence of the elastic foundation appears to induce a sinusoidal effect on the post-buckling behavior of the disk.
ENGINEERING WITH COMPUTERS
(2022)
Article
Mechanics
G. G. Sheng, Yan Han, Zihang Zhang, Lei Zhao
Summary: This study investigates the nonlinear free and forced vibrations of functionally graded cylindrical microshells conveying viscous fluid, considering size effects and viscous forces. The critical flow velocity and natural frequency are obtained numerically, and the effects of axial load, scale parameter, fluid flow velocity and viscosity on nonlinear dynamic response are studied. Comparisons with inviscid case and previous literature are also discussed.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Multidisciplinary
Xiao Chen, Linyuan Fan, Peng Lin
Summary: This study proposes two computational methods, the 2D-GDQM and adaptively tuned deep neural network, for predicting the frequency response of sandwich disks. The 2D-GDQM discretizes the equations of motion using a grid-based approach, providing accurate and efficient frequency solutions. The adaptively tuned deep neural network predicts natural frequencies by training on frequency solutions obtained from 2D-GDQM simulations. Both methods accurately predict the natural frequencies of sandwich disks with honeycomb cores, with 2D-GDQM being more computationally efficient and the neural network approach being more flexible.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Construction & Building Technology
Khaled Alhaifi, Ehsan Arshid, Ahmad Reza Khorshidvand
Summary: The current study involved large deflection analysis of an FGSP rectangular plate on a nonlinear elastic foundation, considering Biot's model, FSDT theory, and GDQM method. The results showed that increasing porosity and Skempton coefficient can respectively enhance and reduce the deflection of the structure, providing insights for designing more reliable engineering structures.
STEEL AND COMPOSITE STRUCTURES
(2021)
Article
Engineering, Civil
Emad Sobhani, Amir R. Masoodi, Amir Reza Ahmadi-Pari
Summary: This research focuses on the natural frequency factors (NFFs) and sandwich nanocomposite models employed in the Assembled Spherical-Cylindrical-Conical Shell (ASCCS) structure. Various numerical methods and theories are used to investigate the mechanical characteristics and vibration modes of ASCCS.
ENGINEERING STRUCTURES
(2022)
Article
Mechanics
Farzad Ebrahimi, Sepehr Bayrami Sedighi
Summary: In this paper, a sandwich composite plate with a tunable magneto-rheological (MR) fluid core was used to analyze wave propagation. The effects of magnetic field and core-to-top layer thickness ratio on the wave dispersion characteristics were investigated. The results showed that the magnetic field intensity was the most important factor in changing the wave dispersion characteristics, and increasing the core-to-top layer thickness ratio led to a decrease in wave frequency.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Mechanics
Erfan Cheshmeh, Mohammed Karbon, Arameh Eyvazian, Dong Won Jung, Mostafa Habibi, Mehran Safarpour
Summary: The buckling and vibration analysis of FG-CNTRC rectangular plate are investigated based on 12-unknown higher order shear deformation theory (HSDT) in this study. The study explores the influence of temperature distribution and boundary conditions on the behavior of the plate through numerical analysis and parametric study.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Mechanics
Kittisak Jermsittiparsert, Aria Ghabussi, Ali Forooghi, Aghil Shavalipour, Mostafa Habibi, Dong Won Jung, Maryam Safa
Summary: Smart composites have become the desired target for high-tech engineering applications due to manufacturing process advancements. This study explores the thermal buckling, critical voltage, and vibration response of a thermally affected graphene nanoplatelet reinforced composite microdisk. The results reveal the significant influence of distribution patterns, weight fraction, piezoelectric thickness, outer to inner radius ratio, and applied voltage on the system's behavior.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Computer Science, Interdisciplinary Applications
M. S. H. Al-Furjan, Mostafa Habibi, Alireza Rahimi, Guojin Chen, Hamed Safarpour, Mehran Safarpour, Abdelouahed Tounsi
Summary: A nonlinear dynamic model is developed for the frequency and chaotic responses of a multi-scale hybrid nano-composite reinforced disk. The effects of different external loads and FG patterns on the motion response of the structure are investigated. It is recommended to choose plates with lower thickness relative to the outer radius for better vibration performance.
ENGINEERING WITH COMPUTERS
(2022)
Article
Mechanics
M. S. H. Al-Furjan, Seyedeh Yasaman Bolandi, Lijun Shan, Mostafa Habibi, Dong Won Jung
Summary: This study focuses on the vibrational characteristics of a rotating multi-hybrid nanocomposite reinforced cantilevered disk. The centrifugal and Coriolis effects due to rotation are taken into consideration. Using the high-order shear deformable theory, the strains and stresses can be determined. The rule of the mixture is applied to access various mass densities and the Poisson ratio, and a modified Halpin-Tsai theory is used to obtain the module of elasticity. The boundary conditions and governing equations are obtained using Hamilton's principle and solved using the generalized differential quadrature method. The results show that factors such as fiber angle, angular velocity, and carbon nanotube patterns significantly impact the amplitude and vibration behavior of the rotating cantilevered disk.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Mechanics
M. S. H. Al-Furjan, Mostafa Habibi, Dong Won Jung, Hamed Safarpour, Mehran Safarpour
Summary: This article presents the axial buckling analysis of a polymer-CNT-fiber nanocomposite annular system resting on Winkler-Pasternak substrates under various temperature gradients. The governing equations are derived using Hamilton's principle and the higher-order shear deformation theory, and a generalized differential quadrature method is employed for an accurate solution. The results show that parameters such as the outer to inner radius ratio, temperature increase patterns, volume fraction and orientation angle of carbon fibers, weight fraction and distribution patterns of carbon-nanotubes, and other geometric and physical parameters play an important role in the axial buckling load of the structure.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Computer Science, Interdisciplinary Applications
Armin Morasaei, Aria Ghabussi, Soheila Aghlmand, Maziar Yazdani, Shahrizan Baharom, Hamid Assilzadeh
Summary: The study focuses on employing intelligent techniques to predict the shear and tensile response of steel-concrete composite floor systems at high temperatures. Results indicate that ELM-GWO technique performs best in predicting split-tensile load, and provides the best estimation of slip value.
ENGINEERING WITH COMPUTERS
(2022)
Article
Mechanics
Farzad Ebrahimi, Ali Dabbagh, Abbas Rastgoo
Summary: This paper investigates the buckling problem of a multi-scale hybrid nanocomposite shell for the first time while the cylinder is supposed to be rested on an elastic substrate. The effects of nanofillers' agglomeration and the equivalent material properties of the carbon nanotube-reinforced (CNTR) nanocomposite are studied. The results provide insights into the failure behavior and propose strategies to enhance the buckling resistance of the nanocomposite structure.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Computer Science, Interdisciplinary Applications
Runqian Ma, Misagh Karimzadeh, Aria Ghabussi, Yousef Zandi, Shahrizan Baharom, Abdellatif Selmi, Nelson Maureira-Carsalade
Summary: This study investigated the structural behavior of simply supported Composite Beams (CBs) jointed with concrete slabs and steel parts. By using a hybrid Extreme machine learning-Grey wolf optimizer algorithm, the performance was compared, showing that the GWO-ELM hybrid model performed better and was more reliable than the solo ELM and GWO models.
ENGINEERING WITH COMPUTERS
(2022)
Article
Physics, Multidisciplinary
Farzad Ebrahimi, Ali Seyfi, Mostafa Nouraei, Parisa Haghi
Summary: The study investigates wave propagation in simply supported functionally graded beams exposed to magneto-thermal environments and embedded on two-parameter elastic foundation. The influence of various parameters on wave frequency and phase velocity of the beams is compared and thoroughly discussed to highlight key findings.
WAVES IN RANDOM AND COMPLEX MEDIA
(2022)
Article
Computer Science, Interdisciplinary Applications
M. S. H. Al-Furjan, Seyedeh Yasaman Bolandi, Mostafa Habibi, Farzad Ebrahimi, Guojin Chen, Hamed Safarpour
Summary: This study presents critical angular velocity, critical velocity of fluid flow, and vibration control analysis of a rotating multi-hybrid nanocomposite reinforced cylindrical microshell. By utilizing a non-classical model, various factors such as Coriolis and centrifugal effects, strains and stresses, and external voltage are considered. The study also applies the rule of mixtures and a modified Halpin-Tsai theory for elasticity modulus, and utilizes a Proportional-Derivative (PD) controller for sensor output control.
ENGINEERING WITH COMPUTERS
(2022)
Article
Engineering, Civil
Aria Ghabussi, Mina Mortazavi, Raghu Betha
Summary: This study focuses on the numerical analysis of curved steel dampers in the hybrid wall panel consisting of cold-formed and hot-rolled squared hollow section frames to improve seismic performance. The results show that the energy dissipation, frame strength, and elastic stiffness are optimal when using a 75 degrees damper with 10 mm thickness and 40 mm depth or a 55 degrees damper with 13 mm thickness and 40 mm depth at the top of the hot-rolled section.
Article
Mechanics
Zhongmin Liu, Xin Zhai
Summary: This study evaluates the potential of lubricating pumps to reduce fuel consumption in passenger cars under standardized driving conditions. The results show that a certain amount of excess hydraulic power is needed under low speed conditions to meet the sudden increase in lubrication requirements. The excess hydraulic power of the lubrication system is proportional to engine speed when the piston spray cooling speed exceeds a certain range. The duration of acceleration conditions in driving cycles and the lubricant temperature are the most critical factors affecting the driving power of the lubricating pump.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
