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Hydrostatic stress
About: Hydrostatic stress is a research topic. Over the lifetime, 1568 publications have been published within this topic receiving 37773 citations.
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TL;DR: In this article, the authors present a system of plastic flow equations which uses and generalizes to the multiaxial case a number of concepts commonly employed in the Local Strain Approach to low cycle fatigue.
Abstract: This paper presents a system of plastic flow equations which uses and generalizes to the multiaxial case a number of concepts commonly employed in the so-called Local Strain Approach to low cycle fatigue. Everything is built upon the idea of distance between stress points. It is believed that this will ease the generalization to the multiaxial case of the intuitive methods used in low cycle fatigue calculations, based on hysteresis loops, Ramberg?Osgood equations, Neuber or ESED rule, etc. It is proposed that the stress space is endowed with a quadratic metric whose structure is embedded in the yield criterion. Considerations of initial isotropy of the material and of the null influence of the hydrostatic stress upon yielding leads to the realization of the simplest metric, which is associated with the von Mises yield criterion. The use of the strain?hardening hypothesis leads in natural way to a normal flow rule and this establishes a linear relationship between the plastic strain increment and the stress increment.
TL;DR: A mathematical model, algorithm, and computer program for studying the stress-strain state and assessing the strength of earth dams in a plane statement under the action of body forces and hydrostatic pressure were developed in this paper .
Abstract: The article is devoted to studying the stress-strain state (SSS) and assessing the strength of the Gissarak, Sokh, and Pachkamar earth dams in a plane statement under the action of body forces and hydrostatic pressure. A mathematical model, algorithm, and computer program for studying the stress-strain state and assessing the strength of structures are developed in the article using the Lagrange variational equation. The finite element method was used in the problem solution. The adequacy of the model and the accuracy of the algorithm and program were verified by solving several test problems. It was revealed that the stress-strain state and strength of the studied earth dams significantly depend on the physical and mechanical properties of soils, the commensurability of geometric dimensions and slope coefficients of the dam retaining prisms, and on the level of water filling in reservoirs.
TL;DR: In this article , the graphitization behavior of diamond powder under non-hydrostatic (pure diamond powder) and quasi-hydrogen (mixed powder of diamond and sodium chloride) compression was quantitatively studied by analyzing the X-ray diffraction peaks' area of treated samples.
01 Jan 1998
TL;DR: The dependence of transport properties, such as electrical conductivity, AC susceptibility and Hall effect, both on hydrostatic and on uniaxial stress are investigated for specimens, which were cut from a single crystal of Bi2Sr2CaCu2Ox, was investigated as discussed by the authors.
Abstract: The dependence of transport properties, such as electrical conductivity, AC susceptibility and Hall effect, both on hydrostatic and on uniaxial stress are investigated for specimens, which were cut from a single crystal of Bi2Sr2CaCu2Ox, was investigated. The dependence of T c on uniaxial stress was not expected one from the viewpoint of a simple charge transfer model. Hall coefficient was measured to investigate the peculiar behavior of T c , resulted in that the change in a density of carriers (hole) plays an important role in the system.
02 Jun 2010
TL;DR: In this article, the authors report measurements of the wall stress in a granular material sheared in a cylindrical Couette cell, as a function of the distance from the free surface.
Abstract: We report measurements of the wall stress in a granular material sheared in a cylindrical Couette cell, as a function of the distance from the free surface. Our results shows that when the material is static, all components of the stress saturate to constant values within a short distance from the free surface, in conformity with earlier experiments and theoretical predictions. When the material is sheared by rotating the inner cylinder at a constant rate, the stresses are remarkably altered. The radial normal stress does not saturate, and increases even more rapidly with depth than the linear hydrostatic pressure profile. The axial shear stress changes sign on shearing, and its magnitude increases with depth. These results are discussed in the context of the predictions of the classical and Cosserat plasticity theories.