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Kumar R.,Kurukshetra University | Sharma K.D.,Swami Devi Dyal Institute of Engineering and Technology | Garg S.K.,Deenbandhu Chhotu Ram University of Science and Technology
Materials Physics and Mechanics | Year: 2012

The present investigation deals with the wave propagation in heat conducting transversely isotropic micropolar viscoelastic half space. Lord and Shulman (1967), Green and Lindsay (1972) and coupled thermoelasticity theories are considered to investigate the problem. The phase velocity and attenuation quality factors are obtained. The expressions for amplitudes of displacement component, microrotation, temperature distribution and stress components are obtained. The resulting quantities are computed numerically and effect of viscosity on these is shown graphically. Some special cases are also introduced from the present investigation. © 2012, Institute of Problems of Mechanical Engineering. Source


Kumar R.,Kurukshetra University | Sharma K.D.,Swami Devi Dyal Institute of Engineering and Technology | Garg S.K.,Deenbandhu Chhotu Ram University of Science and Technology
Advances in Acoustics and Vibration | Year: 2014

The reflection of plane waves at the free surface of thermally conducting micropolar elastic medium with two temperatures is studied. The theory of thermoelasticity with and without energy dissipation is used to investigate the problem. The expressions for amplitudes ratios of reflected waves at different angles of incident wave are obtained. Dissipation of energy and two-temperature effects on these amplitude ratios with angle of incidence are depicted graphically. Some special and particular cases are also deduced. © 2014 Rajneesh Kumar et al. Source


Abbas I.A.,King Abdulaziz University | Abbas I.A.,Sohag University | Kumar R.,Kurukshetra University | Sharma K.D.,Swami Devi Dyal Institute of Engineering and Technology | Garg S.K.,Deenbandhu Chhotu Ram University of Science and Technology
Journal of Computational and Theoretical Nanoscience | Year: 2015

The present investigation is to study the plane problem in a homogeneous isotropic micropolar thermoelastic half-space with void in the context of Lord-Shulman, Green-Lindsay and coupled thermoelasticity (CT) theories. The problem is investigated due to normal force, tangential force and thermal source. Finite element method technique has been used to solve the problem. The components of displacement, microrotation, stress, temperature change and volume fraction field are computed numerically. The computed numerical results are stimulate numerically and depicted graphically for a particular model. Effect of relaxation times are shown on the resulting quantities. Copyright © 2015 American Scientific Publishers All rights reserved. Source


Kumar R.,Kurukshetra University | Sharma K.D.,Swami Devi Dyal Institute of Engineering and Technology | Garg S.K.,Deenbandhu Chhotu Ram University of Science and Technology
Materials Physics and Mechanics | Year: 2014

The reflection of plane waves at the free surface of transversely isotropic micropolar viscothermoelastic medium is investigated. It is found that there exist four types of plane waves in transversely isotropic micropolar viscothermoelastic medium, namely quasi-longtitudinal displacement (qLD), quasi-transverse displacement (qTD), quasitransverse microrotaional (qTM), quasi-thermal (qT) wave. The amplitude ratios corresponding to reflected waves are obtained numerically when different waves are incident. Numerically simulated results are depicted graphically with respect to the frequency. The effect of viscosity on the amplitude ratios are shown graphically for specific model. Some particular results are also deduced. © 2015, Institute of Problems of Mechanical Engineering. Source


Singh H.,Singhania University | Arora D.,Swami Devi Dyal Institute of Engineering and Technology | Wason A.,Hindustan Institute of Technology and Management
Optik | Year: 2012

The wavelength assignment algorithm is a method to improve the performance in respect of blocking probability and to provide cost effective communication system. In this paper, we have developed a simple mathematical model which is used for the calculation of blocking probability of an OBS network. The implementation of the proposed model has less complexity and the computation used is quite efficient. This model can be implemented on different network topologies. The validity of model is supported by simulation results. © 2012 Elsevier GmbH. All rights reserved. Source

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