Results 231 to 240 of about 511,312 (269)

The strain-rate sensitivity of the hardness in indentation creep

Journal of Materials Research, 2007
Finite 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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Hardness and strain rate sensitivity of nanocrystalline Cu

Scripta Materialia, 2006
The 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, 2010
In 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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On the strain rate sensitivity of HDPE/CaCO3 nanocomposites

Materials Science and Engineering: A, 2008
Abstract 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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The Characterization of Materials by Precision Strain Rate Sensitivity

Journal of Engineering Materials and Technology, 1987
Strain 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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The influence of the strain rate sensitivity on ductile fracture

Scripta Metallurgica, 1980
Abstract A theoretical model has been formulated which describes how the strain in a tensile bar can localize to a thin sheet of material with a higher volume fraction of particles than the surrounding material. The strain localization at first occurs gradually but later proceeds rapidly until the volume fraction of voids is so large in the sheet of ...
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Impulsively Loaded Strain-Rate-Sensitive Plates

Journal of Applied Mechanics, 1967
The 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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Heterogeneous Structure Omnidirectional Strain Sensor Arrays With Cognitively Learned Neural Networks

Advanced Materials, 2023
Su Jae Lee, Sung Kyu Park
exaly  

Strain Engineering: A Boosting Strategy for Photocatalysis

Advanced Materials, 2022
Yunxuan Zhao, Run Shi, Tierui Zhang
exaly  

On the Strain Rate Sensitivity Measured by Nanoindentation at High Strain Rates

JOM
B. L. Hackett, P. Sudharshan Phani, C. C. Walker, W. C. Oliver, G. M. Pharr   +4 more
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