Continuum Foundations of Endochronic Plasticity

1984 ◽  
Vol 106 (4) ◽  
pp. 367-375 ◽  
Author(s):  
K. C. Valanis
Keyword(s):  
Plastic Strain ◽  
Experimental Determination ◽  
Strain Tensor ◽  
Three Dimensional ◽  
Strain History ◽  
Periodic Stress ◽  
Strain Space ◽  
Plastic Strain Tensor ◽  
Standard Tests

In this paper a number of issues are addressed. The proper measure of intrinsic time is shown to be the norm of the increment of the plastic strain tensor, if the memory path is a line in the cojoint stress-strain space and elasticity at reversal points is stipulated. The convexity of the kernel function suffices to show that a periodic plastic strain history will give rise to a periodic stress history—as is observed. Standard tests are then established for the unequivocal experimental determination of the kernel and hardening function, valid for use in general three-dimensional histories.

scholarly journals Учет влияния полей остаточных деформаций в современных физико-механических технологиях обработки конструкционных материалов

2019 ◽  
Vol 45 (1) ◽  
pp. 27
Author(s):  
Ю.Н. Кульчин ◽  
В.Е. Рагозина ◽  
О.В. Дудко
Keyword(s):  
Plastic Strain ◽  
Elastic Waves ◽  
Strain Tensor ◽  
Elastic Field ◽  
Reversible Strain ◽  
Elastic Plastic ◽  
Elastic Process ◽  
Elastic Shock ◽  
Plastic Strain Tensor

AbstractA strict determination of the mechanisms of redistribution of previously accumulated irreversible strains as a result of additional elastic shock actions on the material is given for a nonlinear gradient model of large elastic–plastic strain. It is shown that this redistribution is limited by rigid transport and rotation of the plastic strain tensor. Formulas for a change in the initial components of the plastic strain tensor in elastic waves are derived. It is shown that the preliminary plastic field affects the dynamics of further reversible strain as one of the factors of formation of the initial quasi-static elastic field, which cannot be obtained in a purely elastic process.

Experimental determination of three-dimensional liquid rocket nozzleadmittances.

AIAA Journal ◽  
1973 ◽  
Vol 11 (3) ◽  
pp. 267-272 ◽  
Author(s):  
B. T. ZINN ◽  
W. A. BELL ◽  
B. R. DANIEL ◽  
A. J. SMITH
Keyword(s):  
Experimental Determination ◽  
Three Dimensional ◽  
Liquid Rocket

Experimental determination of the three‐dimensional primary field of a seismic airgun array.

2011 ◽  
Vol 129 (4) ◽  
pp. 2602-2602
Author(s):  
Arslan M. Tashmukhambetov ◽  
George E. Ioup ◽  
Juliette W. Ioup ◽  
Natalia A. Sidorovskaia ◽  
Joal J. Newcomb ◽  
...  
Keyword(s):  
Experimental Determination ◽  
Three Dimensional ◽  
Primary Field

Submicrometre-resolution polychromatic three-dimensional X-ray microscopy

2012 ◽  
Vol 46 (1) ◽  
pp. 153-164 ◽  
Author(s):  
B. C. Larson ◽  
L. E. Levine
Keyword(s):  
Spatial Resolution ◽  
Elastic Strain ◽  
Strain Tensor ◽  
Three Dimensional ◽  
Direct Determination ◽  
Phase Identification ◽  
Sn Whisker ◽  
X Ray ◽  
Elastic Strain Tensor

The ability to study the structure, microstructure and evolution of materials with increasing spatial resolution is fundamental to achieving a full understanding of the underlying science of materials. Polychromatic three-dimensional X-ray microscopy (3DXM) is a recently developed nondestructive diffraction technique that enables crystallographic phase identification, determination of local crystal orientations, grain morphologies, grain interface types and orientations, and in favorable cases direct determination of the deviatoric elastic strain tensor with submicrometre spatial resolution in all three dimensions. With the added capability of an energy-scanning incident beam monochromator, the determination of absolute lattice parameters is enabled, allowing specification of the complete elastic strain tensor with three-dimensional spatial resolution. The methods associated with 3DXM are described and key applications of 3DXM are discussed, including studies of deformation in single-crystal and polycrystalline metals and semiconductors, indentation deformation, thermal grain growth in polycrystalline aluminium, the metal–insulator transition in nanoplatelet VO2, interface strengths in metal–matrix composites, high-pressure science, Sn whisker growth, and electromigration processes. Finally, the outlook for future developments associated with this technique is described.

Eigenstresses in Anisotropic Films

1991 ◽  
Vol 239 ◽  
Author(s):  
Ferdinando Auricchio ◽  
Mauro Ferrari
Keyword(s):  
Stress Field ◽  
Experimental Determination ◽  
Three Dimensional ◽  
Closed Form Solution ◽  
Form Solution ◽  
Ceramic Film ◽  
Stress States ◽  
Resultant Stress ◽  
Structural Theories

ABSTRACTA closed-form solution for a macroscopically homogeneous, fully anisotropie layer subject to non-uniform through-thickness eigenstrain is presented, and employed in determining the three-dimensional deformation and stress states of a thermally loaded ceramic film with microstructure-induced macroscopic anisotropy. The resultant stress field is compared with those that could be deduced by experimental determination of the curvature and the classical structural theories.

scholarly journals I mpact of compaction and thaw conditionson deformation characteristics of thawing soils

2017 ◽  
pp. 58-63
Author(s):  
P. I. Kotov ◽  
L. T. Roman ◽  
M. N. Tsarapov
Keyword(s):  
Physical Properties ◽  
Experimental Determination ◽  
Sandy Loam ◽  
Three Dimensional ◽  
Deformation Characteristics ◽  
Clay Loam ◽  
Laboratory Studies ◽  
Compression Coefficient ◽  
Plane Parallel

The results of laboratory studies of the effect of thawing conditions (plane-parallel or three dimensional) on the deformation characteristics (thawing and compression coefficients) thaw- ing soils (sand, sandy loam, clay loam) with desired physical properties of massive and layered cryogenic textures presented in the article. It was found that the values of the thawing coefficient bigger after three dimensional thawing, and compression coefficient after plane- parallel thaw- ing. The obtained data allowed to establish the applicability of the experimental determination of thawing soils deformation characteristics regardless of thawing conditions.

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