Evaluation of Elber's Crack Closure Model as an Explanation of Train Load Sequence Effects on Crack Growth Rates

Details

• Creators:
  Jeong, David Y. ; Sih, G. C.
• Corporate Creators:
  John A. Volpe National Transportation Systems Center, (U.S.) ; Lehigh University
• Corporate Contributors:
  United States. Federal Railroad Administration
• Subject/TRT Terms:
  • Cracking
  • Evaluation
  • Fatigue (Mechanics)
  • Mathematical models
  • Rail (Railroads)
  • Rates
  • Sealing (Technology)
  • Wheel loads
• Publication/ Report Number:
  DOT/FRA/ORD-90/06 ; DOT-TSC-FRA-90-1
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  United States. Federal Railroad Administration
• NTL Classification:
  AGR-INFRASTRUCTURE-Railroads ; NTL-RAIL TRANSPORTATION-RAIL TRANSPORTATION ; NTL-RAIL TRANSPORTATION-Rail Safety ; NTL-SAFETY AND SECURITY-Rail Safety ; NTL-SAFETY AND SECURITY-Vehicle Design ; NTL-SAFETY AND SECURITY-SAFETY AND SECURITY
• Abstract:
  Elber's crack closure model is studied in relation to the results of laboratory spectrum crack growth tests on compact tension specimens (CTS) fabricated from rail effected by mean of an analysis of a center cracked panel (CCP) subjected to an equivalent stress spectrum. (The model cannot be directly applied to the CTS because it is numerically unstable when supplied with finite element approximations for the elastic displacement field at the plastic zone boundary.) The trends of the model predictions and test results agree as to the effect of changing cycle order in the spectrum, but the actual effect on crack growth life in the laboratory tests is found to be much stronger than the effect predicted by Elber's model.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/11644/dot_11644_DS1.pdf
• File Type:
  [PDF - 735.87 KB]
• Collection(s):
  Volpe Center
• Main Document Checksum:
  urn:sha256:14bdc1c55b5a1c299969bb1438d5446eacb317c5246115a63a8138be710224c4