title: Stiff response of aluminum under ultrafast shockless compression to 110 GPA.
abstract: A laser-produced x-ray drive was used to shocklessly compress solid aluminum to a peak longitudinal stress of 110 GPa within 10 ns. Interface velocities versus time for multiple sample thicknesses were measured and converted to stress density (Px-rho) using an iterative Lagrangian analysis. These are the fastest shockless compression Px(rho) results reported to date, and are stiffer than models that have been benchmarked against both static and shock-wave experiments. The present results suggest that at these short time scales there is a higher stress-dependent strength and a stiffer time-dependent inelastic response than had been expected.
authors.affiliation: Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, USA.
authors.forename: Raymond F
authors.initials: RF
authors.lastname: Smith
authors.forename: Jon H
authors.initials: JH
authors.lastname: Eggert
authors.forename: Alan
authors.initials: A
authors.lastname: Jankowski
authors.forename: Peter M
authors.initials: PM
authors.lastname: Celliers
authors.forename: M John
authors.initials: MJ
authors.lastname: Edwards
authors.forename: Yogendra M
authors.initials: YM
authors.lastname: Gupta
authors.forename: James R
authors.initials: JR
authors.lastname: Asay
authors.forename: Gilbert W
authors.initials: GW
authors.lastname: Collins