title: Impact craters in loose granular media.
abstract: The craters formed by the impact of steel balls with a loose sand bed are experimentally studied. Both crater size and morphology depend strongly on the impact angle. Two scaling laws, corresponding to length and width, respectively, are proposed.
authors.affiliation: Department of Mechanics, Lanzhou University, 730000, Lanzhou, PRC.
authors.forename: X-J
authors.initials: XJ
authors.lastname: Zheng
authors.forename: Z-T
authors.initials: ZT
authors.lastname: Wang
authors.forename: Z-G
authors.initials: ZG
authors.lastname: Qiu