Strain localization during deformation of Westerly graniteA specimen of Westerly granite was cyclically loaded to near failure at 50 MPa confining pressure. Holographic interferometry provided detailed measurements of localized surface deformations during loading and unloading. The data are consistent with deformation occurring primarily elastically at low differential stress; in conjunction with one incipient fault zone between approximately 350 and 520 MPa differential stress; and in conjunction with a second incipient fault zone above 580 MPa and/or during creep. During unloading only one fault zone, that which is active at the intermediate stress levels during loading, is seen to recede.
Document ID
19850045850
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Brodsky, N. S. (Colorado Univ. Boulder, CO, United States)
Spetzler, H. A. (Cooperative Institute for Research in Environmental Sciences Boulder, CO, United States)