Results 211 to 220 of about 898,092 (267)
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Apparent stresses in disturbed pulsatile flows
Journal of Biomechanics, 1988Traditional attempts at decomposing measured velocities into repeatable and random components are examined for a set of velocity data measured under pulsatile flow conditions distal to a 90% axisymmetric constriction. The Reynolds numbers, which are typical of those found in the human carotid artery, are such that transitional phenomena occur during ...
B B, Lieber, D P, Giddens
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Journal of Applied Physics, 1956
Simultaneous measurements of flow birefringence, shear and normal stresses on a 15% solution of polyisobutylene in decalin were performed. They proved that the extinction angle measured in birefringence is identical to the orientation of the principal tensile stress calculated from the normal stress measurements and that the birefringence was ...
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Simultaneous measurements of flow birefringence, shear and normal stresses on a 15% solution of polyisobutylene in decalin were performed. They proved that the extinction angle measured in birefringence is identical to the orientation of the principal tensile stress calculated from the normal stress measurements and that the birefringence was ...
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Acta Metallurgica et Materialia, 1993
Abstract Experimental results on the flow stress of potassium in the temperature range of 1–30 K are compared with atomistic computer simulation of rigid dislocation motion and of dislocation kink pair generation and migration. Quantitative agreement is demonstrated.
M.S. Duesbery, Z.S. Basinski
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Abstract Experimental results on the flow stress of potassium in the temperature range of 1–30 K are compared with atomistic computer simulation of rigid dislocation motion and of dislocation kink pair generation and migration. Quantitative agreement is demonstrated.
M.S. Duesbery, Z.S. Basinski
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Flow stress anisotropy in aluminium
Acta Metallurgica et Materialia, 1990The plastic anisotropy of cold-rolled high purity aluminum (99.996%) and commercially pure aluminum (99.6%) has been investigated. Sample parameters were the initial grain size and the degree of plastic strain (ϵ < 3.00). Flow stresses (0.2% offset) were measured at room temperature by uniaxial tension as a function of the angle between the tensile ...
D. Juul Jensen, N. Hansen
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Gastric blood flow in restraint stress
The American Journal of Digestive Diseases, 1972Alterations in gastric mucosal hemodynamics during the development of restraint-induced gastric erosions in the rat were studied using the indicator fractionation technic with86Rb. Cardiac output, gastric flow fractions and gastric blood flow were determined in rats subjected to zero (control), 1/2, 4 and 24 hours of restraint. No correlation was found
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Dislocation structures and flow stress
Materials Science and Engineering: A, 1997The relation between polycrystal deformation and single crystal deformation has been studied for pure aluminium deformed in tension. A quantitative microstructural analysis has shown a significant effect of grain orientation on the microstructural evolution of grains in the polycrystal.
Niels Hansen, Xiaoxu Huang
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Metallurgical Transactions A, 1976
Ordering and disordering treatments have been given to an alloy of composition corresponding to Cu3Au to produce a range of order and domain size values not obtainable by any other technique. Flow stresses in polycrystalline materials have been obtained for a range of grain sizes, and the results examined in terms of several previously suggested models
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Ordering and disordering treatments have been given to an alloy of composition corresponding to Cu3Au to produce a range of order and domain size values not obtainable by any other technique. Flow stresses in polycrystalline materials have been obtained for a range of grain sizes, and the results examined in terms of several previously suggested models
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Acta Metallurgica, 1987
The reverse microflow associated with the Bauschinger effect in copper strained into stage II is characterized experimentally and analyzed in terms of the theory of obstacle-controlled flow and established composite theory. The results are discussed in the light of observations by electron microscopy, deformation calorimetry and X-ray diffraction.
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The reverse microflow associated with the Bauschinger effect in copper strained into stage II is characterized experimentally and analyzed in terms of the theory of obstacle-controlled flow and established composite theory. The results are discussed in the light of observations by electron microscopy, deformation calorimetry and X-ray diffraction.
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Secondary stresses in viscoelastic flow
Journal of Colloid Science, 1951Abstract Theoretical equations are developed for secondary stresses in a shearing viscoelastic fluid. The theory assumes that the elastic stresses developed by the continuous shear also relax continuously in accordance with Maxwell's relaxation theory of viscosity. The steady-state strains are analyzed by the theory of superelasticity.
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N1 stresses in extensional flows
Journal of Non-Newtonian Fluid Mechanics, 2016Abstract The possible role of shear-generated normal stresses in flows which appear to be extensional in nature is rarely considered. But in a recent article we showed that, in flows of Boger fluids through arrays of rods, the increased flow resistance caused by elasticity was related to the property N1 and not to extensional stresses. In the present
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