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Transient swelling-induced finite bending of hydrogel-based bilayers:analytical and FEm approaches

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Applied mathematics and mechanics(English Edition) 2023年第2期44卷 273-288页

作者： A.amiri m.BANIASSADI m.BAGHANI School of mechanical Engineering College of EngineeringUniversity of TehranTehran ***Iran

Hydrogels with their time-dependent intrinsic behaviors have recently been used widely in soft structures as sensors/*** of the most interesting structures is the bilayer made up of hydrogels which may undergo swelling-induced *** this work,by proposing a semi-analytical method,the transient bending of hydrogel-based bilayers is *** nonlinear solid mechanics,a robust semi-analytical solution is developed which captures the transient finite bending of hydrogel-based ***,the multiphysics model of the hydrogels is implemented in the finite element method(FEm) framework to verify the developed semi-analytical procedure *** effects of different material properties are investigated to illustrate the nonlinear behavior of these *** von-mises stress contour extracted from FEm shows that the critical area of these soft structures is at the interface of the layers which experiences the maximum stress,and this area is most likely to rupture in large deformations.

关键词： hydrogel transient swelling bilayer multiphysics finite bending

Stress and buckling analysis of a thick-walled micro sandwich panel with a flexible foam core and carbon nanotube reinforced composite (cNTRc) face sheets

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Applied mathematics and mechanics(English Edition) 2020年第7期41卷 1027-1038页

作者： A.amiri m.mOHAmmADImEHR m.ANVARI Department of Solid mechanics Faculty of Mechanical EngineeringUniversity of KashanKashan 87317Iran

In this paper,the stresses and buckling behaviors of a thick-walled mi-cro sandwich panel with a flexible foam core and carbon nanotube reinforced composite(cNTRc)face sheets are considered based on the high-order shear deformation theory(HSDT)and the modified couple stress theory(mcST).The governing equations of equi-librium are obtained based on the total potential energy *** effects of various parameters such as the aspect ratio,elastic foundation,temperature changes,and volume fraction of the canbon nanotubes(cNTs)on the critical buckling loads,normal stress,shear stress,and deflection of the thick-walled micro cylindrical sandwich panel consider-ing different distributions of cNTs are *** results are compared and validated with other studies,and showing an excellent *** have become very use-ful and common candidates in sandwich structures,and they have been extensively used in many applications including nanotechnology,aerospace,and *** paper also extends further applications of reinforced sandwich panels by providing the modified equations and formulae.

关键词： stress and buckling analysis thick-walled micro cylindrical sandwich panel flexible foam core carbon nanotube reinforced composite(cNTRc)face sheet high-order shear deformation theory(HSDT)

Simulation Study of the Electron and Hole Transport in a cNTFET

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communications in Theoretical Physics 2013年第1期59卷 121-124页

作者： A.Bahari m.amiri Department of Physics University of Mazandaran

In this work we have investigated electron and hole transport through zig zag carbon nanotubes by solving Boltzmann Transport Equation(BTE).We find that the mobility of electrons is rather greater than *** nanotubes with longer diameter can carry higher ***,transport of electrons(or holes) is dominated by scattering events,which relax the carrier momentum in an effort to bring the conducting material to equilibrium.

关键词： transport nanotubes BTE

Zinc-ion hybrid supercapacitors with ultrahigh areal and gravimetric energy densities and long cycling life

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Journal of Energy chemistry 2022年第7期31卷 480-491,I0012页

作者： Ahmad amiri m.Naraghi Andreas A.Polycarpou J.mike walker’66 mechanical engineering department texas a&m universitycollege stationTX 77843USA department of aerospace engineering texas a&m universitycollege stationTX 77843USA

Zinc ion hybrid supercapacitor (ZIHSc) with promising energy and power densities is an excellent answer to the ever-growing demand for energy storage *** restricted lifespan due to the dendrite formation on metallic zinc (Zn) is one of the main ***,we investigate the electrochemical capability of oxygen-enriched porous carbon nanofibers (A-cNF) and nitrogen,oxygen-enriched porous carbon nanofibers (N-cNF) cathode materials for structural *** this end,a series of samples with different chemical compositions (N and O contents) are prepared to present deep insight into the electrochemical mechanism between N/O doping and Zn-ion *** as-prepared ZIHSc in the presence of N-cNF cathode and Zn cl_(2) electrolyte offers a battery-level gravimetric energy density of 143.2 Wh kg^(-1)at a power density of 367.1 W kg^(-1).The free-standing N-cNF electrodes in ZIHScs enjoy delivering an outstanding areal energy density of 110.4μWh cm^(-2)at 0.24 m W cm^(-2),excellent rate capability,and noticeable cycling stability over 10,000 cycles at 10 A g^(-1)with less than 7%*** was also concluded that active pyrrolic N dopants might deliver and facilitate more pseudocapacitance in ZIHScs than other N configurations,resulting in higher adsorption/desorption and insertion/extraction process of Zn cl^(+).Taking advantage of the beneficial properties of a free-standing continuous cathode,this novel generation of structural cathode material offers high areal and gravimetric energy densities and mechanical properties in a single zinc-ion-based package.

关键词： Porous carbon nanofibers Zinc chloride electrolyte Zinc ion hybrid supercapacitors Nitrogen-doping Activation Energy density

constraints on neutron skin thickness and symmetry energy of 208Pb through Skyrme forces and cluster model

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chinese Physics c 2020年第5期44卷 92-99页

作者： m.moghaddari amiri O.N.Ghodsi Department of Physics Faculty of ScienceUniversity of MazandaranP.O.Box 47415-416BabolsarIran

We used the cluster structure properties of the 212Po to estimate the neutron skin thickness of *** this purpose,we considered two important components:(a)alpha decay is a low energy phenomenon;therefore,one can expect that the mean-field,which can explain the ground state properties of 212Po,does not change during the alpha decay process.(b)212Po has a high alpha cluster-like structure,two protons and two neutrons outside its core nucleus with a double magic closed-shell,and the cluster model is a powerful formalism for the estimation of alpha decay preformation factor of such *** slope of the symmetry energy of 208Pb is estimated to be 75±25 meV within the selected same mean-fields and Skyrme forces,which can simultaneously satisfy the ground-state properties of parent and daughter nuclei,as their neutron skin thicknesses are consistent with experimental data.

关键词： α-decay isospin asymmetry neutron-skin thickness Hartree-Fock formalism

Square Integrable Representation of Groupoids

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Acta mathematica Sinica,English Series 2007年第2期23卷 327-340页

作者： H.amiri m.LASHKARIZADEH BAmI Department of mathematics University of Isfahan

A notion of an irreducible representation, as well as of a square integrable representation on an arbitrary locally compact groupoid, is introduced. A generalization of a version of Schur＇s lemma on a locally compact groupoid is given. This is used in order to extend some well-known results from locally compact groups to the case of locally compact groupoids. Indeed, we have proved that if L is a continuous irreducible representation of a compact groupoid G defined by a continuous Hilbert bundle H = （Hu）u∈G^0, then each Hu is finite dimensional. It is also shown that if L is an irreducible representation of a principal locally compact groupoid defined by a Hilbert bundle （G^0, （Hu）,μ）, then dimHu = 1 （u ∈ G^0）. Furthermore it is proved that every square integrable representation of a locally compact groupoid is unitary equivalent to a subrepresentation of the left regular representation. Furthermore, for r-discrete groupoids, it is shown that every irreducible subrepresentation of the left regular representation is square integrable.

关键词： topological groupoid irreducible representation square integrable representation

Simulation and Analysis of multisoliton Generation Using a PANDA Ring Resonator System

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chinese Physics Letters 2011年第10期28卷 95-98页

作者： I.S.amiri A.Afroozeh m.Bahadoran Department of Physics Science and Research BranchIslamic Azad UniversityTehranIran

A novel system of multisoliton generation using nonlinear equations of the propagating signals is *** system uses a PANDA ring resonator incorporated with an add/drop filter *** resonant conditions,the intense optical fields known as multisolitons can be generated and propagated within a Kerr-type nonlinear *** present simulation results show that multisolitons can be controlled by using additional Gaussian pulses input into the add port of the PANDA *** the soliton pulse in the microring device,a balance should be achieved between dispersion and nonlinear *** output signals from the PANDA ring resonator are input into the add/drop filter *** signals can be filtered by using the add/drop filter system,in which multi dark and bright solitons can be *** this work multi dark and bright solitons with an FWHm and an FSR of 425 pm and 1.145 nm are generated,respectively,where the Gaussian pulse with a central wavelength of 1.55µm and power of 600 mW is input into the system.

关键词： resonator system soliton

Reaction parameters influence on the catalytic performance of copper-silica aerogel in the methanol steam reforming

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燃料化学学报 2016年第1期44卷 84-90页

作者： Taher Yousefi amiri Jafarsadegh moghaddas Transport Phenomena Research center Chemical Engineering FacultySahand University of Technology Department of chemical Engineering Faculty of EngineeringUniversity of Zanjan

Steam reforming of methanol was carried out on the copper-silica aerogel *** effects of reaction temperature,feed rate,water to methanol molar ratio and carrier gas flowrate on the H_2 production rate and cO selectivity were investigated.m ethanol conversion was increased considerably in the range of about 240-300,after which it increased at a slightly lower *** used feed flowrate,steam to methanol molar ratio and carrier gas flowwere 1.2-9.0 m L/h,1.2-5.0 and 20-80 m L/min,*** the feed flowrate increased the H_2 production *** was found that an increase in the water to methanol ratio and decreasing the carrier gas flowrate slightly increases the H2production *** the water to methanol ratio causes the lowest temperature in which cO formation was observed to rise,so that for the ratio of 5.0 no cO formation was detected in temperatures lower than 375℃.In all conditions,by approaching the complete conversion,increasing the main product concentration,increasing the temperature and contact time,and decreasing the steam to methanol ratio,the cO selectivity was *** results suggested that cO was formed as a secondary product through reverse water-gas shift reaction and did not participate in the methanol steam reforming reaction mechanism.

关键词： copper-silica aerogel activity cO selectivity reaction parameters methanol steam reforming

configuration-dependent stretchable all-solid-state supercapacitors and hybrid supercapacitors

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carbon Energy 2023年第5期5卷 1-47页

作者： Ahmad amiri Ashley Bruno Andreas A.Polycarpou J.mike Walker’66 mechanical Engineering Department Texas A&M UniversityCollege StationTexasUSA

Given the rise in the popularity of wearable electronics that are able to deform into desirable configurations while maintaining electrochemical functionality,stretchable and flexible(hybrid)supercapacitors(Scs)have become increasingly of interest as innovative energy storage *** outstanding power density,long lifetime with low capacitance loss,and appropriate energy density,in particular in hybrid cases make them ideal candidates for flexible *** aim of this review paper is to provide an in-depth discussion of these stretchable and flexible Scs ranging from fabrication to electro-mechanical *** review paper begins with a short overview of the fundamentals of charge storage mechanisms and different types of multivalent metal-ion hybrid *** research methods leading up to the current state of these stretchable and flexible Scs are then *** is followed by an in-depth presentation of the challenges associated with the fabrication methods for different *** novel strategies to maximize the elastic and electrochemical properties of stretchable/flexible or quasi-solid-state Scs are classified and the pros and cons associated with each are *** advances in mechanical properties and the expected advancements for the future of these Scs are discussed in the last section.

关键词： 1D fiber-like Scs 2D planar supercapacitors 3D sponge and textile structures flexible/stretchable supercapacitors kirigami/origami-inspired structures