• An experimental study of ultrasonic vibration and the penetration of granular material 

      Firstbrook, David; Worrall, Kevin; Timoney, Ryan; Suñol Galofre, Francesc Xavier; Gao, Yang; Harkness, Patrick (2017-02-01)
      Article
      Accés obert
      This work investigates the potential use of direct ultrasonic vibration as an aid to penetration of granular material. Compared with non-ultrasonic penetration, required forces have been observed to reduce by an order of ...