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

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.

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

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 vacuum.The expressions for the reflection coefficients,which are the relations of the amplitudes of the reflected waves to the amplitude of the incident waves,are obtained.Similarly,the reflection coefficient ratio variations with the angle of incident under different conditions are shown graphically.Comparisons are made with the results predicted by the dual-phase-lag model and Lord-Shulman theory in the presence and absence of magnetic field.

Effect of magnetic field on poroelastic bone model for internal remodeling

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.

Model of Fractional Heat Conduction in a Thermoelastic Thin Slim Strip under Thermal Shock and Temperature-Dependent Thermal Conductivity

The present paper paper,we estimate the theory of thermoelasticity a thin slim strip under the variable thermal conductivity in the fractional-order form is solved.Thermal stress theory considering the equation of heat conduction based on the time-fractional derivative of Caputo of order
is applied to obtain a solution.We assumed that the strip surface is to be free from traction and impacted by a thermal shock.The transform of Laplace(LT)and numerical inversion techniques of Laplace were considered for solving the governing basic equations.The inverse of the LT was applied in a numerical manner considering the Fourier expansion technique.The numerical results for the physical variables were calculated numerically and displayed via graphs.The parameter of fractional order effect and variation of thermal conductivity on the displacement,stress,and temperature were investigated and compared with the results of previous studies.The results indicated the strong effect of the external parameters,especially the timefractional derivative parameter on a thermoelastic thin slim strip phenomenon.

Rotational Effects on Magneto-Thermoelastic Stoneley, Love and RayleighWaves in Fibre-Reinforced Anisotropic General Viscoelastic Media of Higher Order

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 field.The 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.

Optimized Deep Learning Model for Colorectal Cancer Detection and Classification Model

The recent developments in biological and information technologies have resulted in the generation of massive quantities of data it speeds up the process of knowledge discovery from biological systems.Due to the advancements of medical imaging in healthcare decision making,significant attention has been paid by the computer vision and deep learning(DL)models.At the same time,the detection and classification of colorectal cancer(CC)become essential to reduce the severity of the disease at an earlier stage.The existing methods are commonly based on the combination of textual features to examine the classifier results or machine learning(ML)to recognize the existence of diseases.In this aspect,this study focuses on the design of intelligent DL based CC detection and classification(IDL-CCDC)model for bioinformatics applications.The proposed IDL-CCDC technique aims to detect and classify different classes of CC.In addition,the IDLCCDC technique involves fuzzy filtering technique for noise removal process.Moreover,water wave optimization(WWO)based EfficientNet model is employed for feature extraction process.Furthermore,chaotic glowworm swarm optimization(CGSO)based variational auto encoder(VAE)is applied for the classification of CC into benign or malignant.The design of WWO and CGSO algorithms helps to increase the overall classification accuracy.The performance validation of the IDL-CCDC technique takes place using benchmark Warwick-QU dataset and the results portrayed the supremacy of the IDL-CCDC technique over the recent approaches with the maximum accuracy of 0.969.

Magneto-Thermoelasticity with Thermal Shock Considering Two Temperatures and LS Model

The present investigation is intended to demonstrate the magnetic field,relaxation time,hydrostatic initial stress,and two temperature on the thermal shock problem.The governing equations are formulated in the context of Lord-Shulman theory with the presence of bodily force,two temperatures,thermal shock,and hydrostatic initial stress.We obtained the exact solution using the normal mode technique with appropriate boundary conditions.The field quantities are calculated analytically and displayed graphically under thermal shock problem with effect of external parameters respect to space coordinates.The results obtained are agreeing with the previous results obtained by others when the new parameters vanish.The results indicate that the effect of magnetic field and initial stress on the conductor temperature,thermodynamic temperature,displacement and stress are quite pronounced.In order to illustrate and verify the analytical development,the numerical results of temperature,displacement and stress are carried out and computer simulated results are presented graphically.This study helpful in the development of piezoelectric devices.

Wave Propagation Model in a Human Long Poroelastic Bone under Effect of Magnetic Field and Rotation

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

Rotational Effect on the Propagation of Waves in a Magneto-Micropolar Thermoelastic Medium

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 half-space.By 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 domain.They calculated such manners of expression numerically and plotted the matching graphs to highlight and make comparisons with theoretical findings.The highlights of the paper cover the impacts of various parameters on the rotating micropolar thermoelastic half-space.Nevertheless,the non-dimensional temperature is not affected by the rotation and the magnetic field.Specific attention is paid to studying the impact of the magnetic field,rotation,and ramp parameter of the distribution of temperature,displacement,stress,and couple stress.The study highlighted the significant impact of the rotation,magnetic field,and ramp parameter on the micropolar thermoelastic medium.In conclusion,graphical presentations were provided to evaluate the impacts of different parameters on the propagation of plane waves in thermoelastic media of different nature.The study may help the designers and engineers develop a structural control system in several applied fields.

On thermoelastic problem based on four theories with the efficiency of the magnetic field and gravity

The fundamental objective of this paper is to study the effectiveness of magnetic field and gravity on an isotropic homogeneous thermoelastic structure based on four theories of generalized thermoelasticity.In another meaning,the models of coupled dynamic theory(CDT),Lord-Shulman(LS),Green-Lindsay(GL)as well as Green-Naghdi(GN II)will be taken in the consideration.Then,applying the harmonic method(normal mode technique),the solution of the governing equations and the expressions for the components of the displacement,temperature and(Mechanical and Maxwell’s)stresses is taken into account and calculated numerically.The impacts of the gravity and magnetic field are illustrated graphically which are pronounced on the different physical quantities.Finally,the results of some research that others have previously obtained may be found some or all of them as special cases from this study.

A magneto -thermo-elastic problem for a half-space without energy dissipation subjected to rotation and gravity field

The prime objective of the present paper is to analyze the effects of the rotation,magnetic field and gravity in a thermo-elastic half-space containing heat source on the boundary of the half-space.The medium assumed under consideration is traction free,homogeneous,isotropic,as well as without energy dissipation.The normal mode analysis and eigenvalue approach technique are used to solve the resulting non-dimensional coupled equations.The comparisons for the physical quantities are established numerically and represented graphically in different cases with respect to the used effects.A comparative and remarkable study has been carried out through various graphs to deliberate the consequences of different parameter on the displacement components,stress components and temperature.

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

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 medium.The 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)models.The normal mode technique is used to find the exact expressions components of displacement,force stress,and temperature.The modifications of the considered variables with the horizontal distance are illustrated graphically to show the distance values that reduce to the variables interrupt.Comparisons 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 medium.The results obtained are calculated numerically and displayed by the graphs to show the effect of the entered new parameters on the phenomena.

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

The problem of the micropolar thermoelastic medium under(G-N)theory of both types II,III under the effect of the gravity was investigated.The normal mode analysis is used to obtain the solution of the physical quantities.Comparisons 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 University.Published by Elsevier B.V.