E
Emmanuel C. David
Researcher at University College London
Publications - 31
Citations - 1029
Emmanuel C. David is an academic researcher from University College London. The author has contributed to research in topics: Elastic modulus & Brittleness. The author has an hindex of 13, co-authored 29 publications receiving 784 citations. Previous affiliations of Emmanuel C. David include Australian National University & Imperial College London.
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Sliding crack model for nonlinearity and hysteresis in the uniaxial stress-strain curve of rock
TL;DR: In this paper, the effect of the stress required to close an initially open crack, and the unloading process in detail, is examined. But the model does not seem to have previously been developed in sufficient detail to be used for quantitative predictions.
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Pore structure model for elastic wave velocities in fluid‐saturated sandstones
TL;DR: In this article, the pore aspect ratio distribution inverted from dry data can then be used to predict saturated velocities as functions of pressure, by introducing fluid into the pores, assuming that the rock contains a distribution of cracks with different aspect ratios.
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Redox-influenced seismic properties of upper-mantle olivine
TL;DR: These findings suggest that elevated water contents are not responsible for low-velocity or high-attenuation structures in the upper mantle and provide no support for the hypothesis whereby a sharp lithosphere–asthenosphere boundary is explained by enhanced grain boundary sliding in the presence of water.
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High Vp/Vs ratio: Saturated cracks or anisotropy effects?
TL;DR: Wang et al. as discussed by the authors measured Vp/Vs ratios of thermally cracked Westerly granite, Carrara marble and 4% porosity Fontainebleau sandstone, for an effective mean pressure ranging from 2 to 95 MPa.
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Laboratory measurements of low- and high-frequency elastic moduli in Fontainebleau sandstone
TL;DR: In this paper, the authors used oscillation tests on two hydrostatically stressed Fontainebleau sandstone samples, in conjunction with ultrasonic velocities and static measurements, under a range of differential pressures (10-95 MPa), and with three different pore fluids (argon, glycerin, and water).