Accession Number : ADA132082

Title :   Interdisciplinary Program for Quantitative Flaw Definition.

Descriptive Note : Semi-annual rept. 1 Jul 77-1 Jan 78.


PDF Url : ADA132082

Report Date : Jan 1978

Pagination or Media Count : 319

Abstract : Document describes three projects as part of the Interdisciplinary Program for Quantitive Flow Definition. Project I is a continuation of the previous effort that led to the establishment of a quantitative capability for measuring the size, shape and orientation of ellipsoidal flaws. Project II is a newly initiated effort with the objective is quantitatively measuring the fracture related properties of surface flaws. Two forms fo interrogating energy are being utilized. Unit A of Project III addresses the long standing problem of predicting the strength of a completed adhesive bond from nondestructive measurements on the joint. Unit B has concentrated on the development of advanced NDE techniques applicable to the graphite epoxy class of fiber reinforced composite materials. Unit C was initited following encouraging nondestructive defect detectability studies in structural ceramics, using high frequency ultrasonics and microfocus X-rays (as well as promising results obtained using microwave methods and acoustic microscopy).

Descriptors :   *Defect analysis, *Ultrasonic tests, *Ultrasonics, *Numerical methods and procedures, Quantitative analysis, Measurement, Sizes(Dimensions), Shape, Ellipsoids, Predictions, Adhesive bonding, Nondestructive testing, Signal processing, Graphite, Fracture(Mechanics), Fiber reinforced composites, Acoustic scattering, Ceramic materials, Surfaces

Subject Categories : Numerical Mathematics
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE