Surface elastic shell model for nonlinear primary resonant dynamics of FG porous nanoshells incorporating modal interactions

Sahmani, S.; Fattahi, A. M.; Ahmed, Noor A.

doi:10.1016/j.ijmecsci.2019.105203

Cited by 67 publications

(9 citation statements)

References 71 publications

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“…Zanoosi [27] captured the strain gradient size effects in the thermo-mechanical free oscillations of FG porous microbeams. Sahmani et al [28][29][30][31] applied the nonlocal stress, surface stress, and strain gradient size dependencies in primary resonant dynamics of microshells having through thickness FG heterogeneity. Fan et al [32] and Yuan et al [33] investigated, respectively, the surface stress and nonlocal strain gradient size effects on the shear stability behavior of FG heterogeneous skew microplates.…”

Section: Introductionmentioning

confidence: 99%

Isogeometric small-scale-dependent nonlinear oscillations of quasi-3D FG inhomogeneous arbitrary-shaped microplates with variable thickness

Tang

Sun

Sahmani

et al. 2021

J Braz. Soc. Mech. Sci. Eng.

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The current investigation deals with proposing a numerical analysis for the geometrically nonlinear large-amplitude vibrations of arbitrary-shaped microplates having variable thickness with various patterns in the presence of couple stress type of microstructural size dependency. To accomplish this purpose, the isogeometric analysis (IGA) is employed to achieve exact geometrical description as well as higher-order efficient smoothness with no meshing difficulty. On the other hand, the modified couple stress continuum mechanics is applied to a refined quasi-3D plate model having the capability to take the thickness stretching into consideration with only four variables. The microplates are assumed made of functionally graded (FG) composites, the material properties of which are changed continuously through the variable thickness. The variation of microplate thickness obeys three different schemes including linear, concave, and convex ones. It is highlighted that by changing the pattern of the thickness variation from convex type to linear one, and then from linear type to concave one, the both classical and couple stress continuum-based nonlinear frequency of the microplates having different shapes increases due to a higher value of the average plat thickness. On the other hand, by considering this change in the thickness variation pattern, it is seen that the significance of the couple stress size effect increases. For this reason, the significance of the stiffening scheme associated with the gradient of rotation gets lower through increment of the material gradient index of a FG composite microplate.

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Section: Introductionmentioning

confidence: 99%

Isogeometric small-scale-dependent nonlinear oscillations of quasi-3D FG inhomogeneous arbitrary-shaped microplates with variable thickness

Tang

Sun

Sahmani

et al. 2021

J Braz. Soc. Mech. Sci. Eng.

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“…Thai et al 51 investigated the influences of nonlocal gradient and dynamic flexoelectric effects on the behaviors of flexoelectric micro energy harvesters and their performance under various loading conditions. Sahmani et al 52 anticipated the small scale‐dependent nonlinar primary resonaane of FG porous nanoshells in the presence of modal interaction. Guo et al, 53 Samaniego et al, 54 and Zhuang et al 55 developed an energy approach implementing the machine learning concepts to solve partial differential equations utilized in computational mechanics.…”

Section: Introductionmentioning

confidence: 99%

Nonlocal strain gradient‐based nonlinear dynamics of sinusoidal impulsive actuated porous/piezoelectric multilayer energy nanoharvesters

Fan,

Sahmani,

Safaei

2023

Polymer Composites

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The applications of nanoelectromechanical systems integrating simultaneously the mechanical and electrical functionalities at nanoscale have been gotten wider in the last decade. The main objective of this exploration is to analyze the small scale‐dependent nonlinear dynamical feedback of multilayer energy nanoharvesters containing a graded porous passive core coated by piezoelectric facesheets under a sinusoidal impulsive external actuation. For this purpose, the technique of meshless collocation is constructed at the same time the nonlocal stress and strain gradient tensors without any necessary background meshes and integration procedure. It is found that by taking the nonlocal stress tensor into account, the average of extremum points of maximum lateral deflection increases from to , and from to for simply supported and clamped multilayer nanoharvesters, respectively. On the contrary, through considering the strain gradient tensor, the average of extremum values of the maximum lateral deflection reduces from to for the simply supported nanoharvester, and from to for the clamped one.Highlights Development a third‐order shear flexible nonlocal strain gradient (NSG)‐based plate‐type nanoharvester model Incorporating the role of nonlocal stress and strain gradient tensors in nonlinear dynamics of nanoharvesters Time‐histories of achieved voltage of sinusoidal impulsive loaded plate‐type nanoharvesters Influence of porosity on the NSG‐based nonlinear dynamic performance.

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“…Liu et al [46] developed a novel method for solving nonlinear forced vibrations of functionally graded (FG) piezoelectric shells in multiphysics fields. However, there have been many studies on nonlinear vibration behaviors of various materials [47][48][49][50][51][52][53][54]. The nonlinear forced vibration behaviors of third-order shear deformable nanobeams in the presence of both surface stress and surface inertia due to high surface to volume ratio were investigated by Sahmani et al [55].…”

Section: Introductionmentioning

confidence: 99%

Thermal Buckling and Bending Analyses of Carbon Foam Beams Sandwiched by Composite Faces Under Axial Compression

Safaei

Onyibo²,

Hurdoganoglu³

2022

FU Mech Eng

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The bending and critical buckling loads of a sandwich beam structure subjected to thermal load and axial compression were simulated and temperature distribution across sandwich layers was investigated by finite element analysis and validated analytically. The sandwich structure was consisted of two face sheets and a core, carbon fiber and carbon foam were used as face sheet and core respectively for more efficient stiffness results. The analysis was repeated with different materials to reduce thermal strain and heat flux of sandwich beams. Applying both ends fixed as temperature boundary conditions, temperature induced stresses were observed, steady-state thermal analysis was performed, and conduction through sandwich layers along with their deformation nature were investigated based on the material properties of the combination of face sheets and core. The best material combination was found for the reduction of heat flux and thermal strain, and addition of aerogel material significantly reduced thermal stresses without adding weight to the sandwich structure.

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Surface elastic shell model for nonlinear primary resonant dynamics of FG porous nanoshells incorporating modal interactions

Cited by 67 publications

References 71 publications

Isogeometric small-scale-dependent nonlinear oscillations of quasi-3D FG inhomogeneous arbitrary-shaped microplates with variable thickness

Isogeometric small-scale-dependent nonlinear oscillations of quasi-3D FG inhomogeneous arbitrary-shaped microplates with variable thickness

Nonlocal strain gradient‐based nonlinear dynamics of sinusoidal impulsive actuated porous/piezoelectric multilayer energy nanoharvesters

Thermal Buckling and Bending Analyses of Carbon Foam Beams Sandwiched by Composite Faces Under Axial Compression

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