Accession Number : AD0722344

Title :   Acceleration of Aluminum Foils by Shocks in PMMA,

Corporate Author : NAVAL ORDNANCE LAB WHITE OAK MD

Personal Author(s) : Edwards,David J. ; Erkman,John O.

Report Date : 31 MAR 1971

Pagination or Media Count : 31

Abstract : Calculations were performed which give the flow induced in adjoining slabs of PMMA and aluminum as a shock wave propagates through the composite plate. Two cases were investigated: the aluminum foil embedded in the PMMA and the foil on the free surface of the PMMA toward which the shock propagated. In order to simplify the calculations, the shock was driven by a piston, i.e., its amplitude was independent of time. Also simple approximations for the equations of state of the PMMA and aluminum were used. Results were obtained by two methods: an artificial viscosity computer code and a graphical method. Results of these computations give the time required for the foil to acquire the expected velocity. Such data are useful in understanding the rise time observed in the records from the electromagnetic gage method for measuring particle velocity in the detonation of explosives. (Author)

Descriptors :   (*SHOCK WAVES, PROPAGATION), (*COMPOSITE MATERIALS, EXPLOSIONS), SHOCK TUBES, FOILS(MATERIALS), ACRYLIC RESINS, IMPACT SHOCK, EXPERIMENTAL DATA, SIMULATION, ELECTROMAGNETIC FIELDS, MEASUREMENT

Subject Categories : Laminates and Composite Materials
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE