Accession Number : AD0645562

Title :   NONDESTRUCTIVE INSPECTION OF REINFORCED PLASTIC STRUCTURES BY THE NUCLEAR QUANDRUPOLE RESONANCE METHOD.

Descriptive Note : Final rept., 15 Mar-1 Nov 66,

Corporate Author : ARA INC WEST COVINA CALIF

Personal Author(s) : Hewitt,Robert R. ; Mazelsky,Bernard

Report Date : 01 NOV 1966

Pagination or Media Count : 52

Abstract : The work reported here is directed toward the investigation of the use of the nuclear quadrupole resonance response of tracer quantities of inert fillers in resins and reinforced polymer structures as a nondestructive testing technique. The strain-sensitive response of nuclear quadrupole resonance has been used to detect defects in idealized test specimens and to measure the strain response of polymer specimens at a microscopic level. The tracer material used in this project was cuprite, Cu2O, in a reagent grade powder form; the polymer used was Epon 828catalyzed with Versamid 140. Some test specimens were fabricated with the straight resin doped with cuprite, and others were made with a glass laminate reinforced structure of the doped resin. Some glass reinforced specimens were fabricated with defects; these defects were detected by the NQR response. The effect of mechanical degradation, induced by cyclic loading, was also observed in the NQR response. (Author)

Descriptors :   (*REINFORCED PLASTICS, NONDESTRUCTIVE TESTING), (*NONDESTRUCTIVE TESTING, *NUCLEAR RESONANCE), COPPER COMPOUNDS, MONOXIDES, PLASTICS, DEFECTS(MATERIALS), LAMINATED PLASTICS, DEGRADATION, DOPING

Subject Categories : Laminates and Composite Materials
      Plastics
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE