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2009
Introduction With elastic deformation, the strains are proportional to the stress, so every level of stress causes some elastic deformation. On the other hand, a definite level of stress must be applied before any plastic deformation occurs. As the stress is further increased, the amount of deformation increases, but not linearly.
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Introduction With elastic deformation, the strains are proportional to the stress, so every level of stress causes some elastic deformation. On the other hand, a definite level of stress must be applied before any plastic deformation occurs. As the stress is further increased, the amount of deformation increases, but not linearly.
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Strain hardening of thermoplastics
Macromolecules, 1993Published stress-strain curves of different thermoplastics in tension are used to evaluate a theoretical equation derived from a model in which the strain hardening effect is related to the Gaussian network theory of rubber ...
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STRAIN HARDENING OF DOUGH AS A REQUIREMENT FOR GAS RETENTION
Journal of Texture Studies, 1992ABSTRACTMechanisms that can be responsible for the ability of wheat flour doughs to retain gas are discussed. It is concluded that the relevant types of physical instabilities are Ostwald ripening (disproportionation) and coalescence of gas cells. The extent of Ostwald ripening is probably primarily controlled by surface rheological properties; it ...
Vliet, T. van +3 more
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Metal Science and Heat Treatment, 1986
1. The nature of the depedence of maximal uniform strain ep and of the strain-hardening coefficient n on the degree of strain hardening and on the heat-treatment regimes is analogous. 2. Strain ep can be calculated by the formula ep=(n −2)/(n −1), where n is determined from the results of two indentations of a spherical indentor.
M. P. Markovets, V. M. Matyunin
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1. The nature of the depedence of maximal uniform strain ep and of the strain-hardening coefficient n on the degree of strain hardening and on the heat-treatment regimes is analogous. 2. Strain ep can be calculated by the formula ep=(n −2)/(n −1), where n is determined from the results of two indentations of a spherical indentor.
M. P. Markovets, V. M. Matyunin
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The quasi-static mechanical response of high purity, polycrystalline [alpha]-titanium is investigated in terms of the underlying deformation mechanisms that govern its macroscopic behavior at room temperature. Constant strain rate tests were conducted on this material in simple compression, plane-strain compression and simple shear, and the true stress
Ayman A. Salem +2 more
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Ayman A. Salem +2 more
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Strength of Materials, 1981
1. Mathematical treatment of experimental data on establishing relationships between σs and ɛ with the use of the “Nairi” computer confirmed the usefulness of the equation σs = mɛn for describing experimental hardening curves and indicates the very close relationship between σs and; the correlation coefficient is 0.935–0.993, However, for many of ...
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1. Mathematical treatment of experimental data on establishing relationships between σs and ɛ with the use of the “Nairi” computer confirmed the usefulness of the equation σs = mɛn for describing experimental hardening curves and indicates the very close relationship between σs and; the correlation coefficient is 0.935–0.993, However, for many of ...
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The secondary hardening phenomenon in strain-hardened MP35N alloy
Acta Materialia, 1998Abstract Mechanical testing and microscopy techniques were used to investigate the influence of aging on the structure and strengthening of MP35N alloy. It was confirmed that aging the deformed material at 600°C for 4 h provided additional strengthening, here referred to as “secondary hardening”, in addition to the primary strain hardening.
S Asgari +4 more
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Strain Hardening and Annealing
1996In this chapter we will discuss three main topics: cold working, by which a metal is simultaneously deformed and strengthened; hot working, by which a metal is deformed at high temperatures without strengthening; and annealing, during which the effects of strengthening caused by cold working are eliminated or modified by heat treatment.
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LAOS: The strain softening/strain hardening paradox
Journal of Rheology, 2014Numerous materials, from biopolymers to filled rubbers, exhibit strain softening at high strain amplitudes during a strain sweep in oscillatory rheology: The modulus decreases with increasing deformation. On the other hand, if the nonlinear elastic response is analyzed within a single oscillation cycle (described by a Lissajous curve), these systems ...
Mermet-Guyennet, M. +5 more
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Shock Propagation in a Strain-Hardening Material
Journal of Applied Mechanics, 1969Weak shock theory is used to analyze the propagation of the stress waves which are induced by nonuniform, instantaneous, internal heating of a nonlinearly elastic, semi-infinite solid. The material nonlinearity considered is caused by the increase in bulk modulus which occurs as the hydrodynamic stress component increases.
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