Results 111 to 120 of about 25,504 (165)

On the Characterization of Strain-Hardening in Plasticity

Journal of Applied Mechanics, 1981
In the context of a purely mechanical, rate-type theory of elastic-plastic materials and utilizing a strain space formulation introduced in [1], this paper is concerned mainly with developments pertaining to strain-hardening behavior consisting of three distinct types of material response, namely, hardening, softening, and perfectly plastic behavior ...
Casey, J., Naghdi, P. M.
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Strain Hardening in Fatigue

Nature, 1966
FRACTOGRAPHIC studies1–3 using optical and electron microscopy have shown that, for many metals, high-strain fatigue endurance is determined by crack propagation of the type designated stage II by Forsyth4. This is contrary to the statistical argument put forward by Gittus5 and the dislocation intersection model of Gilman6, neither of which is in ...
A. T. PRICE, P. J. SMITH
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Strain Hardening and ‘Strain-Rate Hardening’

1982
The limitations of power-law strain hardening and ‘strain-rate hardening’ descriptions are reviewed. It is found that significant advantages can be gained by using, instead, the Voce relation, especially in the proposed modification that accounts for the rate sensitivities of flow stress and of strain hardening.
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Hardening the surface of austenitic steels by strain hardening

Metal Science and Heat Treatment, 1971
1. The carrying capacity in terms of permissible stress (σ0, 2) of steels Kh18N10T and Kh21N5AG7 under conditions of uniaxial static tension increases 50% down to −253° as the result of surface hardening. 2. For hardened steels Kh18N10T and Kh21N5AG7 σ b n /σn > 1 and σ b n /σ0.2 > 1 with Kt=3.0 in the range of 20 to −253° C. 3.
D. V. Lebedev, B. M. Ovsyannikov
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Tensile instability and necking in materials with strain hardening and strain-rate hardening

Acta Metallurgica, 1977
Abstract An in-depth examination of tensile instability and necking in materials with strain hardening and strain-rate hardening has been made to clear up some recent controversies on this subject. A simplified analytical model presented here reveals that a preexisting geometric imperfection can grow from the outset of deformation (i.e.
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Strain hardening of aluminium at high strains

Acta Metallurgica, 1983
Abstract The paper brings a critical analysis of the shape of the strain hardening curve of aluminium within the range of high strains. Basing on a statistical analysis it has been shown that the hardening curve has a series of plateaus. The structural investigations indicate that the plateaus on the hardening curve correspond to heterogeneous ...
A. Korbel, F. Dobrzanski, M. Richert
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On Strain-Hardened Circular Cylindrical Shells

Journal of Applied Mechanics, 1960
A consistent kinematic hardening theory termed complete hardening, based on a Tresca initial yield condition, has been applied to determine the general flow laws for rotationally symmetric shells. Representative “long” and “short” cylindrical shell problems with zero axial load are solved using complete hardening and a simpler but approximate kinematic
Perrone, Nicholas, Hodge, Philip G. jun.
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Strain hardening in liquid-particle suspensions

Physical Review E, 2005
The behavior of a liquid-particle suspension induced to sheared motion was analyzed by numerical simulations. When the velocity (strain) of the suspension began to increase, its viscosity first stayed almost constant, but increased then rapidly to a clearly higher level.
Hyväluoma, Jari, Raiskinmäki, Pasi, Koponen, Antti, Kataja, Markku, Timonen, Jussi   +4 more
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Apparent Strain-Hardening

Journal of Mechanical Engineering Science, 1972
Continuous and interrupted room temperature compression tests were carried out on geometrically similar specimens of duralumin, pure copper and lead, using steel and ebonite dies. Significant differences in strain-hardening rate were ascribed to heat-transfer during deformation.
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Dislocation Multipoles and Their Role in Strain-Hardening

Journal of Applied Physics, 1964
The stress fields of edge dislocation dipoles are able to trap other edge dislocations that pass nearby. The configurations, energies, and trapping stresses of the resulting tripoles are discussed here in some detail. Dipoles may also interact dynamically with approaching dislocations because they cause fluctuating stresses. The decrease in the average
Chen, H. S., Gilman, J. J., Head, A. K.
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