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We present results from two series of triaxial deformation experiments performed on dry samples of two sandstones (Darley Dale and Gosford) carried out at confining pressures from 25 MPa to 200 MPa. Over this pressure range the mode of failure in both these sandstones passes from localized brittle failure with a clear through-going fault to distributed cataclastic flow. During these experiments,...
We report results from a series of laboratory triaxial-deformation experiments performed on samples of Darley Dale sandstone at servo-controlled constant strain rate and constant pore-fluid pressure. During deformation, the volume of water either expelled from the samples during compaction or injected into the samples during dilatancy in order to maintain a constant pore-fluid pressure was continuously...
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