RELIABILITY OF SINGLE-AND MULTI-MEMBER STRUCTURE SUBJECTED TO FLUCTUATING LOAD

The growth of the fatigue crack under fluctuating load in which amplitude was assumed to be a random variable following Rayleigh distribution was discussed. The probability distribution function of the fatigue crack length after a number of load applications was given and the momentary risk and reliability functions were obtained using Griffith-Irwin criterion for catastrophic failure. Numerical simulations were carried out to check the result and compare it with Palmgren-Miner rule. It was shown that the fatigue lives estimated from Palmgren-Miner rule were much longer than those of the present model. The result was applied to a multiple-member structure to see its fail-safe capacity. Two methods were proposed to determine upper and lower bounds of reliability function of the structure.

• Corporate Authors:

  Society of Naval Architects of Japan

  23 Shiba-kotohiracho, Minato-ku
  Tokyo 135,   Japan 
• Authors:
  • Itagaki, H
  • Shinozuki, M
  • Freudenthal, A M
• Publication Date: 1971

Media Info

• Pagination: p. 99-116
• Serial:
  • Selected Papers, J of Soc of Naval Arch of Japan
  • Volume: 8
  • Publisher: Society of Naval Architects of Japan

Subject/Index Terms

• TRT Terms: Fatigue (Mechanics); Fatigue tests; Reliability; Structural mechanics
• Uncontrolled Terms: Fatigue life
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00035099
• Record Type: Publication
• Source Agency: Society of Naval Architects of Japan
• Files: TRIS
• Created Date: Oct 27 1972 12:00AM