Rock joint compliance tests for compression and shear loads

Evolution of fracture normal stiffness due to pressure dissolution and precipitation

“…This reflects the fact that, with increasing p, existing contact areas grow and new contact areas form in such a way that the distributions of stress and contact spot size remain constant if normalized to the area of discrete contact (Sun et al, 1985;Persson, 2006). It follows that the contact ratio R c varies linearly with p (Figure 8), and that the distributions of contact stress and contact patch size scale linearly with p when normalized to the nominal area (Campañá et al, 2011).…”

Discontinuity Analysis for Rock Engineering

“…Sun et al (1985) noted that if the compliance matrix has non-zero components only on its leading diagonal, then the stiffness matrix will also have non-zero components only on its leading diagonal, with values given by the reciprocal of the corresponding components of the compliance matrix. Sun et al (1985) noted that if the compliance matrix has non-zero components only on its leading diagonal, then the stiffness matrix will also have non-zero components only on its leading diagonal, with values given by the reciprocal of the corresponding components of the compliance matrix.…”

“…Those who wish to learn more about discontinuity compliance and its experimental determination are advised to read the authoritative papers by Sun et al (1985) and Amadei and Saeb (1990). This characteristic, which is commonly observed in rough discontinuities, carries the requirement that, in general, stiffness terms should be evaluated by inversion of the complete compliance matrix and not by taking the reciprocal of individual components.…”

Anisotropic damage of rock joints during cyclic loading: constitutive framework and numerical integration

“…The degree of peaking is known to be a scale‐dependent effect and is much less evident for both large and highly weathered joints. See, for example, the experimental work in .…”