Response function analysis of excited-state kinetic energy functional constructed by splitting k-space

Over the past decade, fundamentals of time independent density functional theory for excited state have been established. However, construction of the corresponding energy functionals for excited states remains a challenging problem. We have developed a method for constructing functionals for excited states by splitting k-space according to the occupation of orbitals. In this paper we first show the accuracy of kinetic energy functional thus obtained. We then perform a response function analysis of the kinetic energy functional proposed by us and show why method of splitting the k-space could be the method of choice for construction of energy functionals for excited states.Comment: 11 page

On the Application of Rousselier's Damage Model to Predict Fracture Resistance Behavior of Zircaloy Fuel Pin Specimens

AbstractIt may not be possible to machine standard fracture mechanics specimens from the thin-walled fuel pins as used in the nuclear reactors due to their geometry. In order to overcome this problem, a combined experimental and finite element (FE) analysis procedure has been adopted in this work. Determination of transverse mechanical properties from the ring type of specimens machined from the thin-walled nuclear reactor fuel pins is not also straightforward due to the presence of combined tension as well as bending loading conditions. However, finite element analysis of the whole ring tension setup can be carried out and the material stress-strain property can be determined through an inverse and iterative procedure. In this work, ring tension tests were carried out on un-irradiated Zircaloy-4 clad tube specimens. The specimen and the mandrel both were modeled in order to evaluate the load-displacement behavior of the test. The Rousselier's micro- mechanical model for ductile fracture was applied to simulate the crack growth in these specimens. The micro-mechanical parameters as determined from the ring tension experiment and finite element analysis were later used to simulate the crack propagation in a standard double-edged notched tensile (DENT) specimen. The J-R curve of the DENT specimen has also been compared with that of a cracked Pin-Loading-Tension (PLT) specimen

An analytical formulation in 3D domain for the nonlinear response of piezoelectric slabs under weak electric fields

AbstractPiezoceramic materials exhibit different types of nonlinearities depending upon the magnitude of the mechanical and electric field strength within the body. Some of the nonlinear phenomena observed under weak electric fields near resonance frequency excitation are the presence of superharmonics in the response spectra and the jump phenomena etc. In this work, an analytical solution for the nonlinear response of rectangular piezoceramic slabs have been obtained by Rayleigh–Ritz method and perturbation technique in the 3-D domain using a generalized nonlinear electric enthalpy density function. Forced vibration experiments (excitation with electric field) have been conducted on a rectangular piezoceramic slab at varying electric field amplitudes and the analytical solutions have been shown to compare very well with the experimental results

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Not AvailableThis paper presents the biophysical impact of various interventions made under watershed development programs, in terms of the creation of additional water resources, and resultant changes in land use and cropping patterns in the Bundelkhand region of Madhya Pradesh State, India. Both primary and secondary data gathered from randomly selected watersheds and their corresponding control villages were used in this study. Analysis revealed that emphasis was given primarily to the creation of water resources potential during implementation of the programs, which led to augmentation of surface and groundwater availability for both irrigation and nonagricultural purposes. In addition, other land based interventions for soil and moisture conservation, plantation activities, and so forth, were taken up on both arable and nonarable land, which helped to improve land slope and land use, cropping pattern, agricultural productivity, and vegetation cover. Water Environ. Res., 90, 83 (2018).Not Availabl

Not Available

Not AvailableThis paper presents the biophysical impact of various interventions made under watershed development programs, in terms of the creation of additional water resources, and resultant changes in land use and cropping patterns in the Bundelkhand region of Madhya Pradesh State, India. Both primary and secondary data gathered from randomly selected watersheds and their corresponding control villages were used in this study. Analysis revealed that emphasis was given primarily to the creation of water resources potential during implementation of the programs, which led to augmentation of surface and groundwater availability for both irrigation and non-agricultural purposes. In addition, other land based interventions for soil and moisture conservation, plantation activities, and so forth, were taken up on both arable and nonarable land, which helped to improve land slope and land use, cropping pattern, agricultural productivity, and vegetation coverNot Availabl