title: An experimental study of ultrasonic vibration and the penetration of granular material.
abstract: 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 magnitude. Similarly, total consumed power can be reduced by up to 27%, depending on the substrate and ultrasonic amplitude used. Tests were also carried out in high-gravity conditions, displaying a trend that suggests these benefits could be leveraged in lower gravity regimes.
authors.affiliation: School of Engineering , University of Glasgow , University Avenue, Glasgow G12 8QQ , UK.
authors.forename: David
authors.initials: D
authors.lastname: Firstbrook
authors.affiliation: School of Engineering , University of Glasgow , University Avenue, Glasgow G12 8QQ , UK.
authors.forename: Kevin
authors.initials: K
authors.lastname: Worrall
authors.affiliation: School of Engineering , University of Glasgow , University Avenue, Glasgow G12 8QQ , UK.
authors.forename: Ryan
authors.initials: R
authors.lastname: Timoney
authors.affiliation: Department of Applied Physics , Universitat Politècnica de Catalunya-BarcelonaTech (UPC) , c/ E. Terradas, 5, 08860 Castelldefels (Barcelona) , Spain.
authors.forename: Francesc
authors.initials: F
authors.lastname: Suñol
authors.affiliation: Surrey Space Centre , University of Surrey , Guildford, GU2 7XH , UK.
authors.forename: Yang
authors.initials: Y
authors.lastname: Gao
authors.affiliation: School of Engineering , University of Glasgow , University Avenue, Glasgow G12 8QQ , UK.
authors.forename: Patrick
authors.identifier: 0000-0002-9930-6012
authors.initials: P
authors.lastname: Harkness
keywords: granular; penetration; rheology; ultrasonic