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A computational implementation based on contact mechanics and on the Boundary Element Method is developed in order to simulate the interaction between disc cutters and rock mass. The contact simulation considers initially a potential contact area which is updated during an incremental load process, in such way the surface can include elements in separation, stick or partial slip. At each incremental load step the configuration of the model shall be evaluated and the values computed at such step are used as parameter to the next load step until the end of the loading process. The investigated model consists in two parallel cutter discs on a flat elastic foundation. In the first simulation the penetration of the discs are studied and the results are compared against a finite element simulation. In the second simulation, the stress distribution in the rock mass is evaluated considering different spacing between the disc cutters by keeping the same load. In addition, two benchmark problems of contact mechanics, such as the cylinder and the flat punch on a elastic foundation, were modeled in order to validate the proposed algorithm. The obtained results were compared against analytical and numerical solutions.

Mecânica do contato com o método dos elementos de contorno para modelagem de máquinas tuneladoras.