Development of Alternating Current Potential Drop (ACPD) Procedures for Crack Detection in Aluminum Aircraft Panels.

Details

• Creators:
  Jablonski, David A.
• Corporate Creators:
  John A. Volpe National Transportation Systems Center (U.S.)
• Subject/TRT Terms:
  • Cracking
  • Airframes
  • Fatigue (Mechanics)
  • Alternating current
  • AC potential drop
  • Crack growth
  • Fatigue
  • R-curve
  • Inspection
  • Fracture mechanics
  More +
• Publication/ Report Number:
  DOT-VNTSC-FAA-93-09 ; DOT-FAA-CT-93-76
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  United States. Department of Transportation. Federal Aviation Administration
• 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.
• Content Notes:
  Introduction, Experimental procedure, Results and discussion, Summary, Appendices, References
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/9439/dot_9439_DS1.pdf
• File Type:
  [PDF - 5.08 MB]
• Collection(s):
  Volpe Center
• Main Document Checksum:
  urn:sha-512:36ac400b62f2e9740c366b23f14ef2bd6df372d36f70dc17ff19870e18e66bdfba197a556e0df02b40b5317a1f8e785b51d7c034d81f23f2167416884b31c705