| Title | Development of Alternating Current Potential Drop (ACPD) Procedures for Crack Detection in Aluminum Aircraft Panels. |
|---|---|
| Record ID | 42256 |
| Personal Name Creator |
Jablonski, David A. |
| Source | 106p. in various pagings |
| Corporate Creator | John A. Volpe National Transportation Systems Center (U.S.) |
| Publisher | United States. Department of Transportation. Federal Aviation Administration |
| Publication Date | 19931201 |
| Language | English |
| 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 instrumentation 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 1mm; (2) monitoring crack propagation at a resolution of the order of 5um; and (3) providing an indirect measurement of crack extension in R-curve type tests of fastener hold details. |
| Public Note | Introduction, Experimental procedure, Results and discussion, Summary, Appendices, References |
| Rosap ID | dot:9439 |
| Rosap URL | https://rosap.ntl.bts.gov/view/dot/9439 |
| TRT Terms | Cracking; Airframes; Mechanical fatigue; Alternating current |
| General Subjects | AC potential drop; Crack growth; Fatigue; R-curve; Inspection; Fracture mechanics; Airframes |
| Classification | NTL - AVIATION - Aviation Safety/Airworthiness |
| Geographical Coverage |
United States |
| OCLC | 29774858 |
| Report Number | DOT-VNTSC-FAA-93-09; DOT-FAA-CT-93-76 |
| Availability | Volpe National Transportation Systems Center, Technical Reference Center |
| Resource type | Tech Report |
| URL | https://ntlrepository.blob.core.windows.net/lib/42000/42200/42256/DOT-VNTSC-FAA-93-09.pdf |
| Format | |
| Database | NTL Digital Repository |