Accession Number : AD0766516

Title :   Experimental Investigation of the Rapid Loading of Clamped Circular Plates by an Electrical Discharge in Water.

Descriptive Note : Technical rept.,

Corporate Author : NORTH CAROLINA STATE UNIV RALEIGH

Personal Author(s) : Williams,J. D. , III ; Sorrell,F. Y. ; Douglas,R. A.

Report Date : AUG 1973

Pagination or Media Count : 44

Abstract : A high voltage, high current electrical discharge is used to produce a shock wave in water which is then reflected from a plate in order to produce rapid loading of the plate. Discharge energies of 1400 to 2800 joules are used to load 6 inch diameter polycarbonate (Lexan) clamped circular plates. The center deflection of the plate is measured as a function of time by using a touch wire technique. Large dynamic deflection but very little permanent deformation is observed and the results do not correlate very well with existing models of rigid/plastic deformation. This is attributed to non-linear and very highly time-dependent material properties. In addition, some estimates on the amount of energy transferred from the discharge to the plate and a discussion of scaling of the experiment are given. (Author)

Descriptors :   (*POLYESTER PLASTICS, IMPACT TESTS), ELECTRIC DISCHARGES, DEFORMATION, PLASTIC PROPERTIES, SHOCK WAVES, STRESSES, STRAIN(MECHANICS), TEST METHODS, TEST EQUIPMENT

Subject Categories : Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE