コアボーリングビットによる岩石の掘削の微視的過程のシミュレーション

概要

論文の詳細を見る
A microscopic process of separating rock particles in drilling by means of a core boring bit is examined on the basis of fracture mechanics. When rock is drilled, concentrated loads are applied through the face stones of the core boring bit to the drilled surface of the rock. By modeling the microcracks on the drilled surface as edge cracks perpendicular to the surface of a semi-infinite elastic body, the problem of crack extension from the tip of the microcrack is analyzed by means of the method of continuous distribution of dislocations. The stress intensity factor at the tip of the edge crack is first discussed, and then numerical simulation of crack extension from the tip of the edge crack when the concentrated load approaches and passes the edge crack is presented.
一般社団法人日本機械学会の論文
1990-08-25