Results 31 to 40 of about 50 (49)

Aspects of strain measures and strain rates

Acta Mechanica, 1986
In finite homogeneous deformation processes, the principal triad generally rotates with respect to a material element during the deformation. The material derivative of the logarithmic strain is no longer simply related to the rate of deformation tensor, and this is exemplified herein.
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Motion and Strain (Rate)

2009
The tensor analysis providing the mathematical foundation for the continuum mechanics is described in Chapter 1. Basic concepts and quantities for continuum mechanics will be studied in the three chapters up to Chapter 4. The description of motion and deformation of a material body constitutes the basic introductory part of the continuum mechanics ...
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Echocardiographic strain and strain rate imaging — Clinical applications [PDF]

International Journal of Cardiology, 2009
Echocardiographic strain and strain rate imaging is a new technology enabling more reliable and comprehensive assessment of myocardial function. The spectrum of potential clinical applications is very wide due to its ability to differentiate between active and passive movement of myocardial segments, to quantify intraventricular dyssynchrony and to ...
Michael Dandel, Roland Hetzer
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Strain-Rate Selection in the Constant-Rate-of-Strain Consolidation Test

1981
Constant-rate-of-strain (CRS) consolidation tests were performed on remolded kaolinite specimens. The effect of strain rate on CRS test data is shown. A relation between soil parameters and strain rate was developed and used to formulate a strain-rate selection procedure.
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Strain Rate and Strain Rate History Effects in Two Mild Steels.

1979
Abstract : Results are presented of a series of experiments performed with two steels to investigate the dependence of flow stress on strain rate and its history. For this purpose quasi-static, dynamic and incremental strain rate tests were conducted on SAE 1020 hot-rolled steel and SAE 1018 cold-rolled steel at room temperature. It is shown that while
R. H. Hawley, J. Duffy, M. L. Wilson
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Strain Rate Sensitivity of Flow Stress at Very High Rates of Strain

1996
In order to clarify the mechanism of the steep rise in the flow stress, widely seen in metallic materials at strain rates above about 5×103/sec, two strain rate change tests were conducted. The strain rate reduction test was made for polycrystalline aluminium, copper, iron and niobium at strain rates up to about 2×104/sec.
K. Sakino, S. Santoh, J. Shioiri
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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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Strain Rate Effects on Ultimate Strain of Copper [PDF]

, 1979
Abstract : The strain-rate effect on strain to failure of copper was experimentally investigated. Both Oxygen Free High Conductivity (OFHC) copper and Electrolytic Tough Pitch (ETP) copper were studied. Ultimate strains were measured for a range of strain rates from 0.0001 strain/second to over 10000.0 strain/second.
S J Bless, David P Bauer
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Strain Rate Effects

1999
The mechanical properties of most materials vary with the rate of loading and this effect is particularly evident in polymers. It is usual when considering rate of loading effects in a material, rather than a structure, to quantify the loading rate in terms of a strain rate where the strain rate can conveniently be visualised as the number of times a ...
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Eulerian strain-rate as a rate of logarithmic strain

Mechanics Research Communications, 1995
W.D. Reinhardt, R.N. Dubey
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