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This document summarizes a numerical simulation of the impact process during pneumatic down-the-hole (DTH) hammer percussive drilling. The simulation used the LS-DYNA finite element code to model the impact of a DTH hammer system on different brittle materials (concrete, granite, sandstone). Previous models of DTH hammer impact were improved by considering 3D effects and coupling between the brittle materials and drill bit. The simulation recorded impact forces, bit insert penetrations, and force-penetratio
- Author
- S KARMAKAR
- Language
- EN