A CUMULATIVE DAMAGE THEORY OF FATIGUE FAILURE

A rational phenomenological theory of fatigue lifetime prediction under arbitrary variation of cycle amplitude is presented. The theory is based on the concept of damage curve families and on an equivalent loading postulate which defines specimens that have suffered identical damage under different loading programs. Lifetime analysis has been performed for various cases of piecewise constant and continuous variation of cycle amplitude. For continuous variation, the method requires numerical integration of nonlinear first order differential equations which have been established in this work. (Author)

• Corporate Authors:

  Tel-Aviv University, Israel

  School of Engineering
  Tel-Aviv,   Israel 
• Authors:
  • HASHIN, Z
  • Rotom, A
• Publication Date: 1977-2

Media Info

• Pagination: 37 p.

Subject/Index Terms

• TRT Terms: Cyclic tests; Deformation curve; Differential equations; Failure; Fatigue (Mechanics); Fatigue tests; Functions (Mathematics); Life cycle analysis; Life expectancy; Loads; Logarithms; Loss and damage; Mathematical models; Numerical integration; Repeated loads; Residual soils; Service life
• Uncontrolled Terms: Fatigue life; Residual
• Old TRIS Terms: Cyclic fatigue; Logarithm functions
• Subject Areas: Design; Marine Transportation; Materials; Society;

Filing Info

• Accession Number: 00166562
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: AFOSR-TR-77-0717, TAU-SOE-395-77
• Contract Numbers: AF-AFOSR-3014-76
• Files: TRIS
• Created Date: Oct 29 1978 12:00AM