Membrane Penetration in Granular Materials at High Pressures
Bopp PA, Lade PV
(Received 26 March 1996; accepted 26 November 1997)

Abstract
The Roscoe dummy-rod method was employed to determine the influence of membrane penetration over a large pressure range for Cambria sand. Specimens with three different initial relative densities were subjected to increasing isotropic confining pressures, up to a maximum stress of 60 MPa. A relationship between effective confining pressure and volume change due to membrane penetration was established. Results indicate that above a confining pressure of approximately 8 MPa, membrane penetration decreases with increasing confining pressure. This is believed to be a function of particle crushing. It was also found that over a large pressure range initial relative density influences the degree of membrane penetration.

Keywords:
granular materials, high pressure, initial relative density, isotropic compression, membrane penetration, particle crushing

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Author Bopp PA, Lade PV Title Membrane Penetration in Granular Materials at High Pressures Symposium , Committee: on