elastic constant sentence in Hindi
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- For the indirect method, a starting resonant frequency spectrum, f _ n ^ { cal } ( n = 1, 2, & ) is calculated using estimated values for the elastic constants and the known sample dimensions and density.
- Once the lattice strains are calculated, the product of these values and the x-ray shear modulus, also known as the diffraction elastic constant GR ( HKL ), provides the stress on different lattice planes, ? ( HKL ).
- It has been extended by P . N . Keating to include anharmonic effects ( and calculate third-order elastic constants ), and many other researchers have extended it to include forces between the covalent bonds, and augment it in other ways.
- The position of these peaks occurs at the natural frequencies f _ n ( from which the elastic constants are determined ) and the quality factor Q ( a measure of how narrow the resonance is ) provides information about the dissipation of elastic energy.
- Interest in elastic properties made its entrance with 17th century philosophers, but the real theory of elasticity, indicating that the elastic constants of a material could be obtained by measuring sound velocities in that material, was summarized only two hundred of years later.
- J . S . Koehler theoretically predicted that by using alternate ( nano-) layers of materials with high and low elastic constants, shearing resistance is improved by up to 100 times as the Frank-Read source of dislocations cannot operate in the nanolayers.
- Relationships between elastic constants and X for cubic systems depending upon the direction of propagation of the phonon, q, and the eigenvector of the phonon, U, where L = longitudinal and T = transverse acoustic waves ( Hayes & Loudon, 1978 ).
- The nature and strength of these forces is important for the scientific understanding of solids since they determine the way the solid responds to these stresses ( elastic constants ), the velocity of sound waves in it, its infra-red absorption, and many other properties.
- The requirement of the symmetry of the stress and strain tensors lead to equality of many of the elastic constants, reducing the number of different elements to 21 C _ { ijkl } = C _ { klij } = C _ { jikl } = C _ { ijlk }.
- Ionization produces electron-hole pairs; the holes are trapped in the lattice near the Al atom, the resulting Li and Na atoms are loosely trapped along the Z axis; the change of the lattice near the Al atom and the corresponding elastic constant then causes a corresponding change in frequency.
- Where is time and is the position along the nerve axon . is the change in membrane density under the influence of the action potential, is the sound velocity of the nerve membrane, and describe the nature of the phase transition and thereby the nonlinearity of the elastic constants of the nerve membrane.
- Enderby MD, Clarke AR, Patel M, Ogden P, Johnson AA, " An automated ultrasonic immersion technique for the determination of three-dimensional elastic constants of polymer composites ", in Ultrasonics, 1998, vol . 36, no 1 5 ( 8 ref . ), pp . 245 249.
- The model has been, and is, used by many research scientists for calculating elastic constants, lattice dynamics, band structure, dislocation strains, atomic configurations at surfaces and interfaces, and other purposes for a wide range of solids, including amorphous ( i . e ., non-crystalline ) materials.
- Ramachandran then spent two years ( 1947 1949 ) at the Cavendish Laboratory in Cambridge, where he earned his X-ray diffuse scattering and its application to determination of elastic constants'under the direction of Professor William Alfred Wooster, popularly known as W . A . Wooster, a leading crystallography expert in the world.
- If Mott only produced early and somewhat minor contributions to that field, notably on alloy hardening with Nabarro and on the topology of a dislocation network lowering the apparent elastic constants of a crystal, there is no doubt that Mott's enthusiasm played its role in the three major steps forward in the field by F . C . Frank on crystal growth and plasticity and later, in Cambridge, by P . Hirsch on the thin film electron microscopy.
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