Article
Engineering, Civil
Amnah M. Alharbi, Mohamed I. A. Othman, Elsayed M. Abd-Elaziz
Summary: This paper presents analytical solutions for a generalized thermoelastic medium with microtemperatures and voids subjected to laser pulse loading. The effects of various variables on the stresses and displacement components of the medium were numerically evaluated using normal mode analysis. The physical response of the medium was graphically illustrated in different scenarios, showing significant impacts of the variables on the medium's behavior.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2021)
Article
Thermodynamics
Yan Li, Yi Zhao, Tianhu He, Xiaogeng Tian, Kai Liao
Summary: This study investigates the thermoelastic Stefan problem with spatio-temporal nonlocal effect and obtains solutions using Laplace transformation and numerical inverse transformation. The solid-liquid phase change of silicon is described by the Stefan interface conditions, and the distributions of transient thermoelastic responses under different parameters are graphically expressed.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Mathematics
Hashim M. M. Alshehri, Khaled Lotfy
Summary: In this paper, the interaction between holes and electrons in semiconductor media is analyzed using the elasto-thermodiffusion theory. A one-dimensional electronic/thermoelastic deformation is described by the governing field equations, which are established based on coupled elasticity theory, plasma diffusion equations, and moving equations. The effects of temperature gradient phase lag, heat flux phase lag, and laser pulses are discussed and compared to silicon and germanium semiconductor materials.
Article
Materials Science, Multidisciplinary
Yan Li, Tianhu He
Summary: The transient response of a half-space heated by a non-Gaussian laser beam is investigated based on generalized thermoelasticity. Coupled governing equations with thermal time-delay factor and thermal kernel function are formulated and solved using Laplace transform technique. The study reveals that the peak values of non-dimensional temperature, displacement, and stress increase with decreasing thermal time-delay factor or increasing exponent of thermal kernel function. Negative temperature values, positive displacement, and stress values occur when the functionally graded parameter is less than zero.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2021)
Article
Physics, Multidisciplinary
A. M. S. Mahdy, Kh Lotfy, A. El-Bary, Ismail M. Tayel
Summary: The main goal of this work is to investigate the interaction impact between three propagated waves, focusing on the elastic wave, plasma wave and thermal waves within the context of the hyperbolic generalized two-temperature theory. The study examines the governing equations during the photothermal theory, exploring the impact of external magnetic field and laser pulse on a semiconductor medium's outer surface. Different models of photo-thermoelasticity theory are obtained through the coupling of photothermal theory and thermoelasticity theory, and integral transforms techniques are used in solving the equations.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Mechanics
Jun Lei, Xun Wei, Qin Wang, Yan Gu, Chia-Ming Fan
Summary: A novel space-time generalized finite difference method has been developed for solving dynamic coupled thermoelasticity problems, where the velocity is introduced as an additional unknown field quantity in the numerical implementation. The accuracy of this method has been verified through numerical analysis of dynamic coupled thermoelasticity problems in different loading cases in homogeneous or heterogeneous plates.
ARCHIVE OF APPLIED MECHANICS
(2022)
Article
Mathematics, Interdisciplinary Applications
Eman A. N. Al-Lehaibi
Summary: This work presents a new thermoelastic model for an isotropic and homogeneous annular cylinder. The inner surface of the cylinder is subjected to thermal shock, while the outer surface remains with no change in temperature and volumetric strain. The governing equations of the model, based on the hyperbolic two-temperature generalized thermoelasticity with fractional-order strain theory, have been derived. Numerical solutions are used to illustrate the effects of fractional-order and two-temperature parameters on the thermal and mechanical waves, including the distributions of temperature, displacement, strain, and stress.
FRACTAL AND FRACTIONAL
(2023)
Article
Thermodynamics
Alireza Zarei, Srikanth Pilla
Summary: This paper introduces an improved thermoelastic theory designed specifically for fast and ultrafast heating of materials. The theory incorporates a time delay in the temperature gradient and introduces the rate of temperature gradient as an additional term in the heat equation. Simulation results show a high level of agreement with experimental data, validating the accuracy of the theory.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Physics, Applied
Cong Min, Yi Zhang, Chaojin Zhang, Chengpu Liu
Summary: The proposed laser synthesis scheme combines single-color and hyper-Gaussian pulses to generate an isolated attosecond pulse (IAP) through interacting with pre-aligned molecules. Numerical results show that under certain hyper-Gaussian parameters, the scheme efficiently produces an IAP, with sensitivity to molecular pre-alignment angles. Optimal hyper-Gaussian parameters and pre-alignment angles can support the generation of the strongest IAP.
MODERN PHYSICS LETTERS B
(2021)
Article
Mechanics
Ismail M. Tayel
Summary: The problem of heating a non-homogeneous thermoelastic layer induced by absorbing a penetrating laser radiation throughout its volume is solved using the dual-phase-lag theory of thermoelasticity. The solution to the problem is obtained using the Laplace integral transform technique, and the distributions of the upper surface temperature, temperature, displacement, and normal stress are presented graphically.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Engineering, Multidisciplinary
Seyed Mahmoud Hosseini, Fengming Li
Summary: An effective meshless method based on the generalized finite difference (GFD) technique is developed to study the effects of strain gradient in the size-dependent Moore-Gibson-Thompson (MGT) coupled non-Fickian diffusion-thermoelasticity analysis in a Love-Bishop nanorod resonator. A new MGT-based model considering the strain gradient is proposed to investigate shock-induced wave propagations in displacement, temperature, and molar concentration fields in a Love-Bishop nanorod resonator for the first time. The governing equations are derived using the strain gradient equations, energy balance equation, and non-Fickian mass diffusion equation, and solved using the GFD-based meshless method.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Mechanics
Wei Peng, Like Chen, Tianhu He
Summary: This paper investigates the transient thermoviscoelastic response of a polymer micro-rod subjected to ultrashort laser pulse heating, taking into account the simultaneous effects of the fractional order parameter and the nonlocal parameter. The governing equations are obtained and solved using the Laplace transform method. The results show that the laser intensity, fractional order parameter, and nonlocal parameter have significant influences on the variation of the considered variables.
Article
Mechanics
S. M. Abo-Dahab, Nahed S. Hussein, A. M. Abd-Alla, H. A. Alshehri
Summary: This article investigates the generalized magneto-thermoelasticity in an orthotropic non-homogeneous continuum solid with a spherical cavity. The solution for displacement, stress components, and temperature has been obtained using an integral transform technique. Comparisons have been made to verify the accuracy of the model, and the effects of inhomogeneity, relaxation time, and magnetic field on temperature, stresses, and displacement are analyzed and presented through graphs.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Biology
Qiao Zhang, Yuxin Sun, Jialing Yang
Summary: This paper analyzes the thermoelastic responses of skin tissue during laser irradiation using a generalized dual-phase-lag model and discusses the effects of various parameters on temperature, displacement, and stress evolutions. The study shows that the generalized DPL bio-heat transfer model produces different results from the classical DPL model and Pennes model, highlighting the importance of parameters such as tissue equivalent diameter and blood vessel diameter.
JOURNAL OF THERMAL BIOLOGY
(2021)
Article
Optics
Yuzhou G. N. Liu, Yunxuan Wei, Omid Hemmatyar, Georgios G. Pyrialakos, Pawel S. Jung, Demetrios N. Christodoulides, Mercedeh Khajavikhan
Summary: Connectivity is crucial in determining the function, dynamics, and resiliency of a network across different systems. In the realm of non-Hermitian physics, complex and asymmetric exchange interactions have been shown to lead to novel behaviors. In this work, active optical oscillators with non-Hermiticity and nonlinearity are used to realize an anisotropic exchange between resonant elements, enabling the observation of the non-Hermitian skin effect and phase locking in a Hatano-Nelson laser array.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Hamdy M. Youssef, A. A. El-Bary
Summary: This paper introduces a new mathematical model of a thermoelastic semiconducting solid sphere based on the Green-Naghdi theories to study photothermal interaction. Damage and rotation have significant effects on all studied functions, especially when the bounding surface of the sphere is thermally loaded.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Mechanics
Hamdy M. Youssef, Alaa A. El-Bary
Summary: This article presents a new model of photothermoelastic and semiconducting two-dimensional solid cylinder, applying ramp-type heat load. The numerical results depict the effects of ramp-time heat parameter, relaxation time parameter, and cylindrical axis length on various functions.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Engineering, Multidisciplinary
Hamdy M. Youssef, Alaa A. El-Bary
Summary: This paper investigates the photothermal interaction of a rotating semi-conducting solid cylinder according to Lord-Shulman's generalized thermoelasticity theory. The study reveals that the mechanical relaxation time and angular velocity parameter have minimal effects on carrier density and temperature increment, but significant effects on strain, stress, and stress-strain energy. The lifetime parameter of the photogenerated carrier has essential implications on all studied functions.
ALEXANDRIA ENGINEERING JOURNAL
(2021)
Article
Engineering, Multidisciplinary
Hamdy M. Youssef, Najat Alghamdi, Magdy A. Ezzat, Alaa A. El-Bary, Ahmed M. Shawky
Summary: This paper aims to construct a modified SEIQR model for evaluating and monitoring the COVID-19 pandemic and compared it to real data. An optimal prevention protocol was presented, including staying at home, transporting sick individuals to safe areas, providing effective treatment, and reliable diagnostic methods.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Mechanics
Hamdy M. Youssef, Eman A. N. Al-Lehaibi
Summary: This paper presents the construction of a two-dimensional mathematical model for a thermoelastic solid cylinder and investigates the effects of parameters on temperature, strain, and stress. It is found that the damage mechanics variable has a significant impact on strain and stress distributions.
ARCHIVE OF APPLIED MECHANICS
(2022)
Article
Engineering, Electrical & Electronic
Hamdy M. Youssef, Najat A. Alghamdi
Summary: The paper focuses on developing a new thermal model of the human breast and discusses the effects of different parameters on effectively destroying tumor tissues.
JOURNAL OF ELECTROMAGNETIC WAVES AND APPLICATIONS
(2022)
Article
Engineering, Mechanical
Hamdy M. Youssef, Hamzah Alharthi, Mohamed Kurdi
Summary: This study focused on thermoelastic homogeneous isotropic nanobeams under consideration of damage mechanics, utilizing the Green-Naghdi model type-II and Laplace transforms technique to analyze the numerical findings for a rectangular silicon nitride thermoelastic nanobeam. The results highlighted the significant impact of mechanical damage value, ramp-time heat parameter, and beam thickness on the examined functions.
JOURNAL OF STRAIN ANALYSIS FOR ENGINEERING DESIGN
(2022)
Article
Chemistry, Physical
Hamdy M. Youssef, Eman A. N. AL-Lehaibi
Summary: The study established a thermal analysis model to investigate the effect of static pre-stress and length scale on the thermal quality factor of a silicon nanobeam resonator. The results suggest that significant enhancement in thermal quality factor can be achieved by tuning static pre-stress and length scale.
Article
Mechanics
Hamdy M. Youssef, Eman A. N. Al-Lehaibi
Summary: The present article presents a mathematical model for a thermoelastic semiconducting solid sphere based on the Green-Naghdi theories, considering fractional-order strain and ramp-time heat parameters. The numerical results show the significant effects of these parameters on the studied functions.
MECHANICS OF TIME-DEPENDENT MATERIALS
(2022)
Article
Physics, Multidisciplinary
Shreen El-Sapa, Hamdy M. Youssef, Alaa. A. El-Bary
Summary: This study presents a novel mathematical model of porous skin tissue based on fractional thermal diffusion and two-temperature heat conduction. The effects of two-temperature parameter, fractional order parameter, and porosity parameter on temperature increment and concentration are investigated and analyzed.
WAVES IN RANDOM AND COMPLEX MEDIA
(2022)
Article
Engineering, Mechanical
Hamdy M. Youssef, Eman An Al-Lehaibi
Summary: In this study, an analytical mathematical model for calculating the vibration in a viscothermoelastic nano-resonator is proposed, and the effects of parameters on the resonator performance are studied.
JOURNAL OF STRAIN ANALYSIS FOR ENGINEERING DESIGN
(2023)
Article
Thermodynamics
Hamdy M. Youssef, Eman A. N. Al-Lehaibi
Summary: The research aims to establish a new theory of generalized thermoelasticity for thermomass gas flow with low velocity and linear resistance based on the general non-Fourier law of heat conduction. The resistance effect has been included in the general heat conduction equation, which is based on the total derivative of the thermomass gas velocity. Two numerical applications of homogeneous, isotropic, and thermoelastic one-dimensional rods were solved using the Laplace transform and numerical inversion methods. The latest findings illustrate the contrasts between the Lord-Shulman model and the present revolutionary thermoelasticity model in terms of thermal and mechanical wave distributions.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Engineering, Mechanical
Hamdy M. Youssef, Alaa A. El-Bary
Summary: The main objective of this work is to analyze the viscothermoelastic behavior of homogeneous and isotropic nanobeams under mechanical damage. A Green-Naghdi type-II model of thermoelasticity is developed under simply supported conditions, and the Laplace transforms are used for solving the governing differential equations. The numerical results demonstrate the significant influence of mechanical damage, mechanical relaxation times, and ramp-time heat on the studied functions and thermomechanical waves of a silicon nitride rectangular nanobeam under thermal loading and simple support.
JOURNAL OF STRAIN ANALYSIS FOR ENGINEERING DESIGN
(2023)
Article
Mathematics
Ibrahim A. Abbas, Hamdy M. Youssef, Alaa A. El-Bary
Summary: In this study, a mathematical model was created to evaluate the thermal reaction in the human head exposed to electromagnetic waves. The research found that the impact of electromagnetic waves emitted by cellular devices is more detrimental to the bones of children's heads than they are to the bones of adults' heads.
Article
Mathematical & Computational Biology
Hamdy Youssef, Najat Alghamdi, Magdy A. Ezzat, Alaa A. El-Bary, Ahmed M. Shawky
Summary: This study established a mathematical epidemic model for the outbreak of COVID-19 and used real data from Saudi Arabia for analysis and validation. The SEIQR model was proven effective in analyzing epidemic spread.
INFECTIOUS DISEASE MODELLING
(2021)
