Showing papers by "Kodakkal Kannan Viswanathan published in 2011"
TL;DR: In this paper, the effects of the geometric parameters, thickness parameters, and material parameters on the frequencies of symmetric angle-ply laminated cylindrical shells with two kinds of material properties under different boundary conditions are analyzed.
Abstract: In this paper, free vibrations of symmetric angle-ply laminated cylindrical shells are presented under different thickness variations. The thickness variations of the shells are linear, exponential, and sinusoidal. Spline function techniques are adopted to approximate the displacement functions, and the point collocation method is used to obtain the generalized eigenvalue problem with appropriate boundary conditions. The effects of the geometric parameters, thickness parameters, and material parameters on the frequencies of symmetric angle-ply laminated cylindrical shells with two kinds of material properties under different boundary conditions are analyzed.
12 citations
TL;DR: In this article, the authors have studied the 8+ isomeric levels, half-lives, deformation parameters, and reduced transition probabilities between 8+? 6+ state of even-even 76Ni to 94Pd nuclei for N = 48 neutrons.
Abstract: Study of the properties of nuclear isomers is a current research focus. We have studied the systematic 8+ isomeric levels, half-lives, deformation parameters, and reduced transition probabilities between 8+ ? 6+ state of even-even 76Ni to 94Pd nuclei for N = 48 neutrons. The calculated half-lives and quadrupole moments are compared with the experimental values. Moreover, we have studied the systematic B (E2) values, intrinsic quadrupole moments and values of s/s2SPas a function of atomic number (Z) for N = 48 neutrons.
10 citations
TL;DR: In this paper, a free vibrational study of symmetric angle-ply laminated cylindrical shells of variable thickness including first order shear deformation theory using spline function approximation is studied.
Abstract: Free vibrational study of symmetric angle-ply laminated cylindrical shells of variable thickness including first order shear deformation theory using spline function approximation is studied. The equations of motion for the cylindrical shells are derived using first order shear deformation theory. The solutions of displacement functions are assumed in a separable form to obtain a system of coupled differential equations in terms of displacement and rotational functions, and these functions are approximated by Bickley-type splines of order three. The vibrations of three and five layered shells, made up of two different types of order of the layers of materials and two types of boundary conditions are considered. A generalized eigenvalue problem is obtained and solved numerically for an eigenfrequency parameter and an associated eigenvector of spline coefficients. Parametric studies are made for the frequency parameters with respect to the coefficients of thickness variations, length-to-radius ratio, length-to-thickness ratio and ply angles under different boundary conditions. In the present work, the results are expected to be more accurate and more suitable for immediate application in the areas of missiles, aviation, shipping, surface transport and a large number of industries related to the cement and chemicals.
4 citations
TL;DR: In this article, the binding energy, reduced transition probabilities and deformation parameter in 69,71,73,75,77,79,79 As nuclei have been calculated.
Abstract: We have calculated binding energy, reduced transition probabilities and deformation parameter in 69,71,73,75,77,79 As nuclei. The energies of projectile-like fragments and Q-value in 76Ge (635 MeV) + 198Pt reactions are also calculated. The theoretical calculations of projectile like fragments (PLFs) energies are compared with the experimental values. The systematic energies for 9/2+ 5/2- de-excitation of + those nuclei indicate maximum deformation at N=42. The decrease in excitation level of the 9/2 state 69 79 from As to As provides some evidence for decreasing quadruple “softness” towards the closed neutron shell at N = 40. We have reported single and coincidence ?-ray spectroscopy of 79As by deep- inelastic collision 76Ge (635 MeV) + 198Pt. The systematic isomeric level and reduced transition probabilities of 69,71,73,75,77,79As nuclei have been investigated.
3 citations
TL;DR: The free electron Compton scattering cross-section was calculated by klein-Nishima as mentioned in this paper, using photon with an energy of 662 keV scattered incoherently through angles from 0-120°.
Abstract: The free electron Compton scattering cross-section are given by klein-Nishima, calculated using photon with an energy of 662 keV scattered incoherently through angles from 0-120°. The Compton scattering effect was calculated producing a linear relationship between the reciprocal of the scattered photon energy and 1/E0as a function of (1-cos θ), where θ is the scattering angle. It was found that the energy of scattered gamma ray decreases as the scattering angles increase. The differential scattering cross-section as a function of θ was calculated.
Key words: Free electron, cross-section, scattering, photon.
2 citations