Accession Number : AD0268991

Title :   THE SOLUTION OF AN AXIALLY SYMMERTRICAL PROBLEM OF THE THEORY OF ELASTICITY BY THE METHOD OF ELECTRO-MODELLING IN THE CASE OF THE ACTION OF CENTRIFUGAL FORCES AND TEMPERATURE FIELDS

Corporate Author : MINISTRY OF AVIATION LONDON (ENGLAND)

Personal Author(s) : KVITKA,A.L. ; AGAREV,V.A. ; UMANSKII,E.S.

Report Date : DEC 1961

Pagination or Media Count : 1

Abstract : D-268 9914N5 AD-268 992Div. 30, 14U (ISTM/TG) OTS price $4.60Armour Research Foundtion, hicago, ILL. ULTRASONIC METHODS FOR NONDESTUCTIVE EVALUAION OF CERAMIC COAINGS. Rept. for 1 Mr 60-29 Feb 61 on Mteras Analysis and Evaluation Techniques, by W. E. Lawrie. Apr 61, 42p. incl. illus. (Contract AF 33616)6396, Proj. 7360) (WAD TR 61-91, pt. 1) Unclassfied report DESCRIPTORS: (*Ceramic coaings, *Refractory coatings, Metals, Alloys, Bonding, Failure (Mechanics), *Utrasonics, Test methods, *Nondestrucive testing, Instrumentation.) (Zirconim compounds, Oxides, Enamel coaings on Seel, Chromium plting on olybenum.) High frequency, Low frequency, Energy. Investigations into the use of ulrasonics to detect defects in ceramic-metal bonds and to measure the strengths of the bonds are described. In the techniques, ultrasonic frequencies from 30 cps to 35 mc/sec were used and in one method 2 frequencies are ued simultaneously. Low frequency energy (14 kc/sec) wa successfully used to detect defecs by decrement measrements. Low frequences were used in further studies of the intermodlation method to locate regions of bonds in whih defects are present. High frequiencies, up to 35 mc/ec, were used with a tansmision method and visul images of defects are displayed using a simple chage scanning technique. High frequency energy was also used in the form of surface waves. (Author)

Descriptors :   *ANALOG COMPUTERS, *ELECTRICAL NETWORKS, *STRESSES, CENTRIFUGAL FIELDS, DETERMINATION, MATHEMATICAL ANALYSIS, ROTATING STRUCTURES, SUPERHIGH FREQUENCY, TEMPERATURE, THERMAL STRESSES

Distribution Statement : APPROVED FOR PUBLIC RELEASE