Accession Number:
ADA275755
Title:
Development of Alternating Current Potential Drop (ACPD) Procedures for Crack Detection in Aluminum Aircraft Panels
Descriptive Note:
Final rept. May-Dec 1990
Corporate Author:
INSTRON CORP CANTON MA
Personal Author(s):
Report Date:
1993-12-01
Pagination or Media Count:
101.0
Abstract:
The Alternating Current Potential Drop ACPD method is investigated as a means of making measurements in laboratory experiments on the initiation and growth of multiple site damage MSD cracks in a common aluminum alloy used for aircraft construction. Procedures for instrumenting MSD test specimens are recommended. The ACPD method is found to be capable of 1 detecting crack initiation at a crack length of the order of 1 mm 2 monitoring crack propagation at a resolution of the order of 5 micrometers and 3 providing an indirect measurement of crack extension in R-curve type tests of fastener hole details. AC Potential drop, Crack growth, Fatigue, Fracture, R-Curve, Stable crack extension
Descriptors:
Subject Categories:
- Aircraft
- Properties of Metals and Alloys
- Electricity and Magnetism