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Strain-rate sensitivity of ultrafine-grained materials
Zeitschrift für Metallkunde, 2005Abstract The strain-rate sensitivity of commercial purity Aluminium (Al 99.5) and of α-iron, with both conventional (CG) and ultrafine (UFG) grain sizes, are investigated by compression and tension tests at different temperatures. Microstructural investigations were performed before and after compression testing in order to investigate the ...
Höppel, H. +3 more
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The Effect of a Lathyritic Diet on the Sensitivity of Tendon to Strain Rate
Journal of Biomechanical Engineering, 1985While the tensile failure properties of rat-tail tendon depend on strain rate, the sensitivity to strain rate decreases with age, especially during sexual maturation. The object of this study was to determine the effect of an experimental model of chronic lathyrism on age-dependent changes in the sensitivity of developing tendon strength to strain rate.
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The strain-rate sensitivity of the hardness in indentation creep
Journal of Materials Research, 2007Finite element analysis is used to simulate indentation creep experiments with a cone-shaped indenter. The purpose of the work is to help identify the relationship between the strain-rate sensitivity of the hardness, νH, and that of the flow stress, νσ in materials for which elastic deformations are significant.
A.A. Elmustafa, S. Kose, D.S. Stone
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On the strain rate sensitivity of HDPE/CaCO3 nanocomposites
Materials Science and Engineering: A, 2008Abstract In the current study the role of both nano-sized calcium carbonate and strain rate on the tensile properties of HDPE was studied. For this purpose standard tensile samples of HDPE and HDPE/10 vol.% CaCO3 were performed using extrusion and injection molding methods. Tensile test was done at different strain rates.
S.M. Zebarjad, S.A. Sajjadi
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Hardness and strain rate sensitivity of nanocrystalline Cu
Scripta Materialia, 2006The measured hardness of nanocrystalline Cu with grain sizes (( as small as 10 nm still follows the Hall-Petch relation. A rate sensitivity of 0.06 +/- 0.01 and a flow stress activation volume of 8b(3) were determined at d = 10 nm, suggesting grain boundary activities are enhanced but not yet dominant in the plastic deformation.
J. Chen, L. Lu, K. Lu
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Study on Strain-Rate Sensitivity of Cementitious Composites
Journal of Engineering Mechanics, 2010In this study, we conduct a combined experimental and micromechanical investigation into the strain-rate sensitivity of concretes, with a special reference to the effect of aggregate concentration. We first measured the stress-strain relations of Type I portland cement with 0.45 water-to-cement ratio (w/c), and then those of the mortar containing sand ...
Huang-Hsing Pan, George J. Weng
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The Characterization of Materials by Precision Strain Rate Sensitivity
Journal of Engineering Materials and Technology, 1987Strain rate sensitivity is a measurement of the thermodynamic response of materials to changes in stress (τ). Correlations of the theoretical derivations to measured values are only valid if the strain rate (γ˙) is performed at constant structure (Σ). Thus transients during strain rate change obliterate the subtleties of the data especially since the ...
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Impulsively Loaded Strain-Rate-Sensitive Plates
Journal of Applied Mechanics, 1967The response of an impulsively loaded, isotropically rate-sensitive annular plate is calculated via “exact” and approximate viewpoints. For a typical example, numerical results differed by about 3 percent. The essence of the approximate approach, which represents a natural extension of a previous one-dimensional analysis [1], is that the initial stress
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On the Strain Rate Sensitivity Measured by Nanoindentation at High Strain Rates
JOMB. L. Hackett +4 more
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