Characterization of Early Stages of Corrosion Fatigue in Aircraft Skin - Phase II: Interpretation of Corrosion-Fatigue Fracture Surfaces in Alclad 2024-T3 Aluminum Alloy Sheet

Details

• Creators:
  Schmidt, C. G. ; Kobayashi, T. ; Shockey, D. A.
• Corporate Creators:
  SRI International
• Corporate Contributors:
  United States. Department of Transportation. Federal Aviation Administration. Office of Aviation Research
• Subject/TRT Terms:
  • Aircraft structural components
  • Airplanes
  • Corrosion
  • Fatigue cracking
• Publication/ Report Number:
  DOT/FAA/AR-99/34
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Edition:
  Phase II Report
• Corporate Publisher:
  United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center
• Description:
  New methods were developed and applied to extract and interpret information from the fracture surfaces of corrosion-fatigue specimens of clad and bare 2024-T3 aluminum sheet. We developed two fracture surface topography analysis methods that characterize the effects of environment and a fracture surface analysis and finite element modeling approach to detect and quantify overloads that occurred during fatigue crack propagation. We used these methods to perform a detailed analysis of the fracture surface topography produced in the early stages of corrosion fatigue, and developed an understanding of the effect of environment on the crack nucleation mechanism based on fracture surface features.
• Format:
  PDF
• Funding:
  95-G-065
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/93741/dot_93741_DS1.pdf
• File Type:
  [PDF - 8.50 MB]
• Collection(s):
  FAA William J. Hughes Technical Center for Advanced Aerospace
• Main Document Checksum:
  urn:sha-512:46da1e8fedce3757baf353d588f871067f2493835e8d937b449cee11d2b8cd5b96638d4b99d8cadcd132bb480a46f1dcfd016f01e21ad8aca490a23a3dfaacf0