Accession Number : AD0818946

Title :   MEASUREMENT OF THE LENGTH OF A CENTRAL OR EDGE CRACK IN A SHEET OF METAL BY AN ELECTRICAL RESISTANCE METHOD.

Descriptive Note : Technical rept.,

Corporate Author : ROYAL AIRCRAFT ESTABLISHMENT FARNBOROUGH (UNITED KINGDOM)

Personal Author(s) : Gilbey, D. M. ; Pearson, S.

Report Date : DEC 1966

Pagination or Media Count : 17

Abstract : The change in length of an edge or central crack in a metal sheet can be obtained by measuring the change in electrical resistance of the sheet containing the crack. This paper gives the theory of the method and the results of a computer programme designed to provide detailed calibration curves. The method has been used to measure crack propagation rates during fatigue and the experimental procedure is described. (Author)

Descriptors :   (*CRACKS, METALS), MEASUREMENT, ELECTRICAL RESISTANCE, COMPUTER PROGRAMS, CURVED PROFILES, FATIGUE(MECHANICS), SHEETS, CALIBRATION.

Subject Categories : Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE