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Effects of rotation and gravity on an electro-magneto-thermoelastic medium with diffusion and voids by using the Lord-shulman and dual-phase-lag models

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Applied mathematics and mechanics(English Edition) 2019年第8期40卷 1135-1154页

作者： s.m.abo-dahab A.m.ABD-ALLA A.A.KILANY Department of mathematics Faculty of SciencesTaif UniversityTaif 888Saudi Arabia Department of mathematics Faculty of ScienceSouth Valley UniversityQena 83523Egypt Department of mathematics Faculty of ScienceSohag UniversitySohag 82524Egypt

The effects of rotation and gravity on an electro-magneto-thermoelastic medium with diffusion and voids in a generalized thermoplastic half-space are studied by using the Lord-shulman (L-s) model and the dual-phase-lag (DPL) model. The analytical solutions for the displacements, stresses, temperature, diffusion concentration, and volume fraction field with different values of the magnetic field, the rotation, the gravity, and the initial stress are obtained and portrayed graphically. The results indicate that the effects of gravity, rotation, voids, diffusion, initial stress, and electromagnetic field are very pronounced on the physical properties of the material.

关键词： electromagnetic field gravity field rotation initial stress voids diffusion normal mode analysis Lord-shulman (L-s) model dual-phase-lag (DPL) model

Effect of magnetic field on poroelastic bone model for internal remodeling

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Applied mathematics and mechanics(English Edition) 2013年第7期34卷 889-906页

作者： A.m.ABD-ALLA s.m.abo-dahab Department of mathematics Faculty of Sciences Taif University Department of mathematics Faculty of Science Sohag University Department of mathematics Faculty of Science South Valley University

This paper studies the effects of the magnetic field and the porosity on a poroelastic bone model for internal remodeling. The solution of the internal bone remodeling process induced by a magnetic field is presented. The bone is treated as a poroelastic material by Biot＇s formulation. Based on the theory of small strain adaptive elasticity, a theoretical approach for the internal remodeling is proposed. The components of the stresses, the displacements, and the rate of internal remodeling are obtained in analytical forms, and the numerical results are represented graphically. The results indicate that the effects of the magnetic field and the porosity on the rate of internal remodeling in bone are very pronounced.

关键词： wave propagation poroelastic wet bone internal remodeling magnetic field

Reflection of PlaneWaves from Electro-magneto-thermoelastic Half-space with a Dual-Phase-Lag model

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Computers, materials & Continua 2016年第2期51卷 63-79页

作者： A.m.Abd-Alla mohamed I.A.Othman s.m.abo-dahab math.Dept. Faculty of ScienceTaif University 888Saudi Arabia Department of mathematics Faculty of ScienceSohag UniversityEgypt math.Dept. Faculty of ScienceZagazig UniversityP.O.Box 44519ZagazigEgypt math.Dept. Faculty of ScienceSouth Valley UniversityQena 83523Egypt

The aim of this paper is to study the reflection of plane harmonic waves from a semi-infinite elastic solid under the effect of magnetic field in a *** expressions for the reflection coefficients,which are the relations of the amplitudes of the reflected waves to the amplitude of the incident waves,are ***,the reflection coefficient ratio variations with the angle of incident under different conditions are shown *** are made with the results predicted by the dual-phase-lag model and Lord-shulman theory in the presence and absence of magnetic field.

关键词： Reflection Generalized thermoelasticity magnetic field Dual-phaselag model

Electromagnetic field in fiber-reinforced micropolar thermoelastic medium using four models

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Journal of Ocean Engineering and science 2020年第3期5卷 230-248页

作者： s.m.abo-dahab A.m.Abd-Alla A.A.Kilany Dept.of mathematics Faculty of ScienceTaif University 888Saudi Arabia Dept.of mathematics Faculty of ScienceSohag UniversityEgypt Dept.of mathematics Faculty of ScienceSVUQena 83523Egypt

This paper aimed to study the effect of electromagnetic field on general model of the equations of the generalized thermoelasticity reinforcement of the deformation of a micropolar generalized thermoelastic *** phenomenon is in the context of the couple theory(C-D),Lord-shulman(L-s)and Green-Lindsay(G-L)as well as the Dual-Phase-Lag(DPL)*** normal mode technique is used to find the exact expressions components of displacement,force stress,and *** modifications of the considered variables with the horizontal distance are illustrated graphically to show the distance values that reduce to the variables *** are made with the results in the absence and presence of electromagnetic field for the general of reinforcement on the total deformation of a micropolar thermoelastic *** results obtained are calculated numerically and displayed by the graphs to show the effect of the entered new parameters on the phenomena.

关键词： Electro-magneto-thermoelasticity micropolar Fiber-reinforced Lord-shulman Green-Lindsay Dual-phase-lag

Rotational Effect on the Propagation of Waves in a magneto-micropolar Thermoelastic medium

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Computers, materials & Continua 2021年第10期69卷 205-220页

作者： A.m.Abd-Alla s.m.abo-dahab m.A.Abdelhafez A.m.Farhan Department of mathematics Faculty of ScienceSohag UniversitySohagEgypt Department of mathematics Faculty of ScienceSouth Valley University83523Egypt Department of Physics Faculty of ScienceJazan UniversityJazanSaudi Arabia Department of Physics Faculty of ScienceZagazig UniversityZagazigEgypt

The present paper aims to explore how the magnetic field,ramp parameter,and rotation affect a generalized micropolar thermoelastic medium that is standardized isotropic within the *** employing normal mode analysis and Lame’s potential theory,the authors could express analytically the components of displacement,stress,couple stress,and temperature field in the physical *** calculated such manners of expression numerically and plotted the matching graphs to highlight and make comparisons with theoretical *** highlights of the paper cover the impacts of various parameters on the rotating micropolar thermoelastic ***,the non-dimensional temperature is not affected by the rotation and the magnetic *** attention is paid to studying the impact of the magnetic field,rotation,and ramp parameter of the distribution of temperature,displacement,stress,and couple *** study highlighted the significant impact of the rotation,magnetic field,and ramp parameter on the micropolar thermoelastic *** conclusion,graphical presentations were provided to evaluate the impacts of different parameters on the propagation of plane waves in thermoelastic media of different *** study may help the designers and engineers develop a structural control system in several applied fields.

关键词： magnetic field micropolar thermoelastic rotation ramp parameter normal mode analysis

The effect of gravity and inclined load in micropolar thermoelastic medium possessing cubic symmetry under G-N theory

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Journal of Ocean Engineering and science 2018年第4期3卷 288-294页

作者： mohamed I.A.Othman s.m.abo-dahab Haneen A.Alosaimi Department of mathematics Faculty of ScienceZagazig UniversityZagazig 44519Egypt Department of mathematics Faculty of ScienceTaif UniversityTaif 888Saudi Arabia Department of mathematics Faculty of ScienceSouth Valley UniversityQena 83523Egypt

The problem of the micropolar thermoelastic medium under(G-N)theory of both types II,III under the effect of the gravity was *** normal mode analysis is used to obtain the solution of the physical *** are made between the results predicted by the(G-N)theory of type II and type III in the presence and absence of gravity and for different values of the angle of inclination.©2018 shanghai Jiaotong *** by Elsevier B.V.

关键词： micropolar thermoelasticity Green-Naghdi theory Normal mode method Gravity Inclined load.

Rotational Effects on magneto-Thermoelastic stoneley, Love and RayleighWaves in Fibre-Reinforced Anisotropic General Viscoelastic media of Higher Order

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Computers, materials & Continua 2017年第1期53卷 49-72页

作者： A.m.Abd-Alla s.m.abo-dahab Aftab Khan math.Dept. Faculty of ScienceTaif University 888Saudi Arabia math.Dept. Faculty of ScienceSohag UniversityEgypt math.Dept. Faculty of ScienceSVUQena 83523Egypt Department of mathematics COMSATSInstitute of InformationPark RoadChakshahzadIslamabadPakistan

In this paper, we investigated the propagation of magneto-thermoelastic surfacewaves in fibre-reinforced anisotropic general viscoelastic media of higher order ofnth order,including time rate of strain under the influence of rotation and magnetic *** generalsurface wave speed is derived to study the effects of rotation, magnetic field and thermal onsurface waves. Particular cases for stoneley, Love and Rayleigh waves are discussed. Theresults obtained in this investigation are more general in the sense that some earlier publishedresults are obtained from our result as special cases. Our results for viscoelastic of order zeroare well agreed to fibre-reinforced materials. Comparison was made with the results obtainedin the presence and absence of rotation, magnetic field and parameters for fibre-reinforced ofthe material medium. It is also observed that, surface waves cannot propagate in a fast rotatingmedium. Numerical results for particular materials are given and illustrated graphically. Theresults indicate that the effect of rotation, magnetic field on fibre-reinforced anisotropic generalviscoelastic media are very pronounced.

关键词： ibre-reinforced viscoelastic surface waves rotation anisotropic thermoelastic magnetic

Wave Propagation model in a Human Long Poroelastic Bone under Effect of magnetic Field and Rotation

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Computers, materials & Continua 2021年第8期68卷 1485-1504页

作者： A.m.Abd-Alla Hanaa Abu-Zinadah s.m.abo-dahab J.Bouslimi m.Omri Department of mathematics Sohag UniversitySohagEgypt Department of statistics University of JeddahCollege of ScienceJeddahSaudi Arabia Department of mathematics South Valley UniversityQena83523Egypt Department of Engineering Physics and Instrumentation National Institute of Applied Sciences and TechnologyCarthage UniversityTunisia Department of Physics Taif UniversityTaifSaudi Arabia Deanship of scientific Research King Abdulaziz UniversityJeddahSaudi Arabia

This article is aimed at describing the way rotation and magnetic field affect the propagation of waves in an infinite poroelastic cylindrical *** offers a solution with an exact closed *** authors got and examined numerically the general frequency equation for poroelastic ***,they calculated the frequencies of poroelastic bone for different values of the magnetic field and *** the results of previous studies,the authors noticed little frequency dispersion in the wet *** proposed model will be applicable to wide-range parametric projects of bone mechanical *** the vibration of surface waves in rotating cylindrical,long human bones under the magnetic field can have an *** findings of the study are offered in ***,a comparison with the results of the literature is conducted to show the effect of rotation and magnetic field on the wave propagation *** is worth noting that the results of the study highly match those of the literature.

关键词： Propagation of waves rotation magnetic field poroelastic wet bone natural frequency magnetic field

Entanglement and Entropy squeezing for moving Two Two-Level Atoms Interaction with a Radiation Field

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Computers, materials & Continua 2021年第3期66卷 2445-2456页

作者： s.Abdel-Khalek E.m.Khalil Beida Alsubei A.Al-Barakaty s.m.abo dahab Department of mathematics Collage of ScienceTaif UniversityTaif21944Saudi Arabia Department of mathematics Faculty of ScienceSohag UniversitySohag82524Egypt Department of mathematics Faculty of ScienceAl-Azhar UniversityCairoEgypt Department of Physics The University College at AljamoumUmm Al-Qura UniversityMakkahSaudi Arabia Department of mathematics Faculty of ScienceSouth Valley UniversityQena83523Egypt

In this paper,we analyzed squeezing in the information entropy,quantum state fidelity,and qubit-qubit entanglement in a time-dependent *** proposed model consists of two qubits that interact with a two-mode electromagnetic field under the dissipation *** analytical solution is calculated by considering the constants for the equations of *** effect of the general form of the time-dependent for qubit-field coupling and the dissipation term on the temporal behavior of the qubit-qubit entanglement,quantum state fidelity,entropy,and variance squeezing are *** is shown that the intervals of entanglement caused more squeezing for the case of considering the time-dependent ***,the entanglement between the qubits became more substantial for the case of time *** and negativity rapidly reached the minimum values by increasing the effect of the dissipation ***,the amount of variance squeezing and the amplitude of the oscillations decreased considerably when the time dependence increased,but the fluctuations increased *** show the relation between entropy and variance squeezing in the presence and absence of the dissipation parameter during the interaction *** result enables new parameters to control the degree of entanglement and squeezing,especially in quantum communication.

关键词： Entropy squeezing variance squeezing qubit-qubit entanglement moving qubits