Constitutive Equations of Rock with Shear Dilatancy
Abstract
Coupling between dilatation and shear stress referred to as 'dilatancy,' has been shown to be a significant feature of rocks. Dilatancy has been identified by Lord Kelvin (1875) and by Reiner (1947) as a second-order effect in the isotropic continuum that arises from the application of the 'principle of material indifference'. Relations required for the interpretation of tests results in the light of this theory are derived. It is shown that dilatancy in rocks is not the result of cracking at compressive stresses below the limit of shear failure, but its cause. Shear-induced density-gradients of physically significant magnitude are believed to provide the key to the understanding of important aspects of the behavior of rocks and rock-like solids.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1975
- Accession Number
- ADA011402
Entities
People
- Alfred M. Freudenthal
Organizations
- George Washington University