%0 Conference Paper %A Mikhailova, N.V. %A Onawumi, P.Y. %A Roy, Anish %A Silberschmidt, Vadim %D 2018 %T Ultrasonically assisted drilling of rocks %U https://repository.lboro.ac.uk/articles/conference_contribution/Ultrasonically_assisted_drilling_of_rocks/9555056 %2 https://repository.lboro.ac.uk/ndownloader/files/17186894 %K untagged %K Mechanical Engineering not elsewhere classified %X Conventional drilling of rocks can generate significant damage in the drilled material; a material layer is often split off a back surface of a sample during drilling, negatively affecting its strength. To improve finish quality, ultrasonically assisted drilling (UAD) was employed in two rocks - sandstone and marble. Damage areas in both materials were reduced in UAD when compared to conventional drilling. Reductions in a thrust force and a torque reduction were observed only for UAD in marble; ultrasonic assistance in sandstone drilling did not result in improvements in this regard. %I Loughborough University