Nantu Sarkar

Bio: Nantu Sarkar is an academic researcher from University of Calcutta. The author has contributed to research in topics: Thermoelastic damping & Isotropy. The author has an hindex of 16, co-authored 58 publications receiving 780 citations. Previous affiliations of Nantu Sarkar include University of Burdwan & Jadavpur University.

On the Analysis of Free Vibrations of Nonlocal Elastic Sphere of FGM Type in Generalized Thermoelasticity

Abstract: Free vibrations of non-homogenous (functionally graded material (FGM)) axisymmetric nonlocal thermoelastic hollow sphere has been taken into consideration for investigation The material of nonlocal thermoelastic sphere is supposed to be graded using power law in radial direction The solution of continued power series is employed to resolve the differential equations and to investigate the analytical solutions for field functions ie temperature, stress and displacement The analytical results have been authenticated using numerical computations with computer based software like MATLAB The numerical results have been shown graphically for the comparison of frequency shift and thermoelastic damping for local and nonlocal elastic materials Deduction of results has been validated with the already published literature

Effect of phase-lags on the transient waves in an axisymmetric functionally graded viscothermoelastic spherical cavity in radial direction

Abstract: This paper aims to present the analysis of transient wave characteristics in a functionally graded viscothermoelastic infinite medium with spherical cavity in the context of generalized thermoelasticity Continued series solution is used to solve simultanious differential equations for evaluating the field variables Convergence of the series solution is implemented and investigated that the series of functions are absolutely and uniformly convergent The formal solution for the field variables are obtained analytically and represented graphically The effect of grading index and different theories of generalized thermoelasticity are also shown graphically to examine the behavior of the variations of the field variables

L–S theory for the propagation of the photo-thermal waves in a semiconducting nonlocal elastic medium

Abstract: The model of the equations of generalized thermoelasticity based on the Lord–Shulman's theory with nonlocal elasticity effect is used to study the photothermal waves in a semiconducting medium. The...

Extended Irreversible Thermodynamics

Abstract: Der vorliegende Band enthált sechs Beitrage, in denen punktuell und exemplarisch der Stand der Forschung beleuchtet wird. Ein Beitrag von Codling und Frasinski beschreibt in erster Linie Experimente zum noch wenig verstandenen Phânomen der dissoziativen Ionisation von Molekülen, bei dem diese in einem intensiven Laserfeld mehrere Elektronén verlieren und in Ionen mit hoher kinetischer Energie zerfallen. Ein wesentlicher Teil dieses Beitrags widmet sich einer von den Autoren entwickelten Auswertungstechnik, welche die Korrelationen zwischen den Fiugzeiten emittierter Ionen und Elektronén sichtbar macht. Es folgen drei Beitrage zur Théorie. Schmelcher und Cederbaum beschreiben Effekte starker statischer Felder, die nur dann zu verstehen sind, wenn die Nicht-Separation der Schwerpunktsbewegung im auBeren Magnetfeld korrekt beriicksichtigt wird. Dies fiihrt

Nonlocal theory of thermoelastic materials with voids and fractional derivative heat transfer

Abstract: A new nonlocal theory of generalized thermoelastic materials with voids based on Eringen’s nonlocal elasticity and Caputo fractional derivative is established. The one-dimensional form of the above...

Eigenvalue approach in a three-dimensional generalized thermoelastic interactions with temperature-dependent material properties

Abstract: A three-dimensional model of the generalized thermoelasticity without energy dissipation under temperature-dependent mechanical properties is established. The modulus of elasticity is taken as a linear function of the reference temperature. The resulting formulation in the context of Green and Naghdi model II is applied to a half-space subjected to a time-dependent heat source and traction free surface. The normal mode analysis and eigenvalue approach techniques are used to solve the resulting non-dimensional coupled equations. Numerical results for the field quantities are given in the physical domain and illustrated graphically. The results are also compared to results obtained in the case of temperature-independent modulus of elasticity.

Photo-thermo-elastic wave propagation in an orthotropic semiconductor with a spherical cavity and memory responses

Abstract: This article highlights on the study of coupled plasma, thermal and elastic waves within an orthotropic infinite semiconducting medium in context of photothermal transport process having a spherica...

A GL Model on Thermo-Elastic Interaction in a Poroelastic Material Using Finite Element Method

Abstract: The purpose of this study is to provide a method to investigate the effects of thermal relaxation times in a poroelastic material by using the finite element method. The formulations are applied under the Green and Lindsay model, with four thermal relaxation times. Due to the complex governing equation, the finite element method has been used to solve these problems. All physical quantities are presented as symmetric and asymmetric tensors. The effects of thermal relaxation times and porosity in a poro-thermoelastic medium are studied. Numerical computations for temperatures, displacements and stresses for the liquid and the solid are presented graphically.