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Article
Mechanics
Indranil Sarkar et al.
Summary: The analysis of thermoelastic wave propagation in continuum solids at micro/nano-seconds is crucial for ultra-fast heating technologies, where strain relaxation effects will significantly increase. This study introduces a novel generalized thermoelasticity model by incorporating an additional strain-rate term and relaxation time parameter into the Lord-Shulman (LS) thermoelasticity. The new model is tested on a one-dimensional half-space problem, demonstrating its ability to eliminate propagating jump discontinuities in strain and stress fields.
JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
(2023)
Article
Mechanics
Ahmed E. Abouelregal et al.
Summary: The paper investigates the impact of the Seebeck effect on flexible materials by constructing the Moore-Gibson-Thompson heat equation model. By incorporating thermal gradients, charge density, Fourier's law, and current density into Ohm's law, the model examines the behavior of unbounded thermoelastic solid material under a uniform magnetic field and continuous thermal line. The study combines Laplace and Hankel transformational methods with the potential function technique and uses numerical inversion algorithms to analyze the physical fields. Measurements of thermoelectric sensitivity and the coefficient relating current density to heat flux density were also conducted.
ARCHIVE OF APPLIED MECHANICS
(2023)
Article
Thermodynamics
Marin Marin et al.
Summary: In this study, we establish a boundary value problem for elasticity of porous piezoelectric bodies with a dipolar structure. By defining two operators on suitable Hilbert spaces, we prove their positivity and self-adjointness, demonstrating that eigenvalues are real numbers and corresponding eigenfunctions are orthogonal. A variational formulation is provided for the eigenvalue problem using a Rayleigh quotient type functional. Additionally, a disturbance analysis in a specific case is investigated. It is important to note that the porous piezoelectric bodies with dipolar structure considered in this study are of a general form, i.e., inhomogeneous and anisotropic.
CONTINUUM MECHANICS AND THERMODYNAMICS
(2023)
Article
Geochemistry & Geophysics
Bo Yang et al.
Summary: This study develops a method to solve problems involving coupled mechanical and thermal motions and verifies its accuracy through numerical simulations. The method is applied to different multilayered models, revealing the propagation phenomena of thermoelastic waves within the interlayer. The study emphasizes the impact of thermal motions on seismic observations, especially in the presence of high thermal conductivity.
GEOPHYSICAL JOURNAL INTERNATIONAL
(2023)
Article
Thermodynamics
Manjeet Kumar et al.
Summary: The purpose of this article is to investigate the propagation characteristics of Rayleigh waves in a nonlocal generalized thermoelastic media, including particle motion, attenuation, and phase velocity. The dispersion relation of Rayleigh waves is established using Helmholtz potentials, taking into account stress-free insulated and isothermal plane surfaces. Numerical computations are performed using MATLAB software. The thermal factors of nonlocal generalized thermoelastic materials significantly influence the particle motion, attenuation, and phase velocity of Rayleigh waves. Numerical examples are provided to examine the effects of material thermal characteristics on Rayleigh wave propagation.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2023)
Article
Mechanics
S. Malik et al.
Summary: This paper investigates the wave propagation at the interface of two distinct nonlocal generalized thermoelastic solids with diffusion. The effect of thermoelastic media on wave propagation is demonstrated through plane wave analysis, which reveals the existence of three coupled waves (P-wave, T-wave, MD-wave) and one transverse wave (SV-wave). The study explores the reflection and transmission phenomena for different waves at the interface of the two media, deriving expressions for their amplitude ratios. The results provide valuable insights for scientists in fields such as geophysics, seismic effects, and materials science.
MECHANICS OF SOLIDS
(2023)
Article
Mechanics
Doaa Atta et al.
Summary: The main objective of this paper is to investigate the relationship between thermal processes and diffusion in thermoelastic solids. A new model that allows thermo-diffusion waves to propagate at finite speeds has been derived. The model is used to investigate a one-dimensional thermodiffusion problem for a homogeneous spherical shell, and analytical expressions for different transformed thermophysical fields are found. The differences between the presented model and previous theories are graphically presented and discussed.
MECHANICS OF TIME-DEPENDENT MATERIALS
(2023)
Article
Mechanics
A. E. Abouelregal et al.
Summary: In this paper, a generalized thermoelastic model with two-temperature characteristics is proposed, which includes a heat transfer equation with fractional derivatives and phase lags. The Caputo-Fabrizio fractional differential operator is used to derive a new model and solve the singular kernel problem of conventional fractional models. The effects of the heat source intensity and fractional order parameter on the thermal and mechanical responses are studied in detail by formulating and solving the governing partial differential equations.
PHYSICAL MESOMECHANICS
(2023)
Article
Multidisciplinary Sciences
Amir Najibi et al.
Summary: In this study, a graded finite element analysis is used to solve the axisymmetric 2D hyperbolic heat conduction equation in a finite hollow cylinder made of functionally graded materials. The graded FE method is verified, and the rule of the mixture with power-law volume fraction is found to enhance the thermal properties' gradation along the radial direction. The effects of Vernotte numbers and material distributions on temperature waves are investigated, and the results are discussed for different heat conduction models and material distributions.
Article
Mathematics
Ahmed E. Abouelregal et al.
Summary: By laminating piezoelectric and flexible materials, their performance can be improved. Therefore, the electrical and mechanical properties of layered piezoelectric materials under electromechanical loads and heat sources need to be analyzed theoretically and mechanically. Extended thermoelasticity models have been derived to address the problem of infinite wave propagation, as classical thermoelasticity cannot address this issue. This paper focuses on the thermo-mechanical response of a piezoelectric functionally graded (FG) rod due to a movable axial heat source, using the dual-phase-lag (DPL) heat transfer model. The physical characteristics of the FG rod vary exponentially along the axis of the body. The Laplace transform and decoupling techniques are used to analyze the physical fields obtained. The results are compared with those in previous literature, considering a range of heterogeneity, rotation, and heat source velocity measures.
Article
Mathematics, Applied
Ahmed E. Abouelregal et al.
Summary: The objective of this work is to improve a generalized thermoelastic heat transport framework, which is compatible with observable physical processes and allows speed reduction of heat waves within the solid. The proposed model can be used to derive alternative thermoelasticity models as special cases. The influence of Hall current on magneto-thermoelastic couplings in an infinite conducting viscoelastic medium with a cylindrical cavity under a strong magnetic field is also considered.
COMPUTERS & MATHEMATICS WITH APPLICATIONS
(2023)
Article
Chemistry, Physical
Yue Shi et al.
Summary: The reduction behaviors and mechanism of three types of fired VTM pellets were investigated. It was found that PA pellets showed excellent resistance to volume swelling and great morphology, while PB and PC pellets displayed abnormal swelling and structural damage. The compositions and grain sizes of iron-and titanium-bearing oxides led to different generation rates and morphologies of metallic iron, directly affecting the reduction characteristics and macroscopic performance of VTM pellets.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
Jun Wang et al.
Summary: The primary purpose of this work is to optimize the thermophysical properties of rare-earth tantalate ceramics using the high-entropy effect. A high-entropy rare-earth tantalate ceramic (10RE 0.1 )TaO 4 was successfully synthesized, and the lattice distortion and oxygen vacancy concentration in the rare-earth tantalates were characterized. Compared with single rare-earth tantalates, (10RE 0.1 )TaO 4 exhibits reduced thermal conductivity and lower phonon thermal conductivity in a wide temperature range. It is attributed to scattering effects from ferroelastic domains, lattice distortion, and point defects targeting different frequency phonons. Additionally, (10RE 0.1 )TaO 4 shows improved thermal expansion coefficient, Young's modulus, and high-temperature phase stability compared to single rare-earth tantalates.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Mechanics
H. Hany Sherief et al.
Summary: This work considers a 2D axisymmetric problem in an infinite body. The body consists of an infinite cylinder made of a different material and containing a variable heat source. The medium is assumed to be initially quiescent. The solution is obtained using the theory of thermoelasticity by Green-Lindsay and employing exponential Fourier and Laplace transform techniques. Numerical inversion process is performed to obtain the results. Numerical results for temperature, stress distributions, and displacement are computed and presented graphically.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2022)
Article
Chemistry, Multidisciplinary
Zhong-Zhen Luo et al.
Summary: Zn plays a crucial role in enhancing the thermoelectric performance of Ga-doped PbTe by improving electronic transport properties and reducing lattice thermal conductivity, resulting in a significant increase in the figure of merit.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Thermodynamics
Kushan Prasad Verma et al.
Summary: This study investigates the effect of locally applied thermal shock on the ceramic side of the functionally graded domain using nonlinear thermoelastic theory. The gradation and orientation of material properties are found to have a significant impact on the propagation of thermal and elastic waves.
JOURNAL OF THERMAL STRESSES
(2022)
Article
Physics, Multidisciplinary
Augustine Igwebuike Anya et al.
Summary: This article investigates the reflection and transmission of waves in a rotating micropolar fiber-reinforced thermo-elastic solid and inviscid liquid media under magnetic fields. The study shows that rotation and magneto-thermo-elastic parameters have significant effects on the modulations and amplitude ratios of the waves. Additionally, rotation increases the transmission coefficient of a specific wave in the liquid medium.
WAVES IN RANDOM AND COMPLEX MEDIA
(2022)
Article
Thermodynamics
Amir Najibi et al.
Summary: In this study, numerical heat conduction analysis was performed for functionally graded porosity (FGP) media. Different heat conduction models were compared in terms of temperature responses to different flux pulse durations. By tuning the porosity gradations, desired temperature distributions can be achieved.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Physics, Multidisciplinary
Husam Alfadil et al.
Summary: This study proposes a novel model to describe the fractional time derivative of viscoelastic semiconductor materials, and explores the thermal and photoacoustic interactions using the AB fractional derivatives operator and the MGT photothermal heat transfer model.
INDIAN JOURNAL OF PHYSICS
(2022)
Article
Engineering, Civil
M. Javani et al.
Summary: A unified formulation for the generalized coupled thermo-visco-elasticity response of hollow spheres is proposed, utilizing the Lord-Shulman, Green-Lindsay, and Green-Naghdi models. The Kelvin-Voigt model is employed to consider the viscoelastic response, with finite element method based on Galerkin weak formulation implemented for solution. The study demonstrates the influences of viscoelastic damping on the response of hollow spheres under rapid surface heating based on various types of generalized theories.
THIN-WALLED STRUCTURES
(2021)
Article
Computer Science, Interdisciplinary Applications
A. E. Abouelregal et al.
Summary: This paper focuses on studying thermal, elastic and coupled plasma waves in the context of a photo-thermal process transport within an infinite semiconductor medium. A new mathematical model based on the Moore-Gibson-Thompson equation is implemented to study photo-thermal interactions in two-dimensional semiconducting materials. The analysis includes effects of rotation, lifetime of the photo-generated, and the applied magnetic field on the distribution of thermophysical fields.
INTERNATIONAL JOURNAL OF MODERN PHYSICS C
(2021)
Article
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M. Choudhury et al.
JOURNAL OF THERMAL STRESSES
(2020)
Article
Thermodynamics
S. M. H. Jani et al.
JOURNAL OF THERMAL STRESSES
(2020)
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Multidisciplinary Sciences
Faris Alzahrani et al.
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Multidisciplinary Sciences
Sayed M. Abo-Dahab et al.
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Nanoscience & Nanotechnology
Anand Kumar Yadav
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Ahmed E. Abouelregal et al.
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JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE
(2020)
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Ramon Quintanilla
MATHEMATICS AND MECHANICS OF SOLIDS
(2019)
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SADHANA-ACADEMY PROCEEDINGS IN ENGINEERING SCIENCES
(2018)
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Amir Najibi et al.
COMPOSITES PART B-ENGINEERING
(2017)
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Manik Chandra Singh et al.
APPLIED MATHEMATICAL MODELLING
(2015)
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Y. Y. Zhu et al.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2014)
Article
Mathematics, Applied
Michael Dreher et al.
APPLIED MATHEMATICS LETTERS
(2009)
