Abstract
In previous analyses of wedge or cone indentation of rocks it has been assumed that the rocks were perfectly plastic materials obeying a Coulomb yield condition. The authors have recently shown that the Coulomb yield condition does not necessarily provide an accurate description of rock behavior and have proposed a new yield condition describing the plastic behavior of compacting and workhardening rocks. The present paper describes a method for the analysis of the indentation of rock that is assumed to obey the new yield condition. This analysis is compared with results assuming the rock obeys the Coulomb yield condition, and it is shown that the new yield condition provides improved agreement with the experimental data obtained during indentation of compacting rock.
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