A Note on the Stress Concentrations at the Bottom of a Flat-Ended Borehole

Crouch, Steven L.
Organization: The Southern African Institute of Mining and Metallurgy
Pages: 3
Publication Date: Unavailable
The 'doorstopper' technique for determining the state of stress in rock requires that the stress concentration factors at the flat end of a borehole be known. Published values of these factors are widely variant. An axisymmetric finite element analysis of this problem has been made, yielding elastic stress concentration factors for different values of Poisson's ratio.
Full Article Download:
(192 kb)