ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 8

Multiaxial Stress-Strain Approximations for Notch Fatigue Behaviors

Walker, EK
Research and development engineerMember of ASTM, Structures Div., Lockheed-California Co., Burbank, Calif.

Abstract

The use of the fatigue notch factor K_f in Neuber's rule is shown to be identical in the elastic range to the assumption of the Hookian stress concentration factor K_t, a multiaxial stress state, and a maximum principal strain criterion for fatigue life. The adequacy of assuming the fatigue notch factor K_f is demonstrated for mild notches. Arguments are presented in favor of assuming a multiaxial stress state at the notch for highly constrained notches.

Keywords:
fatigue (materials), stresses, strains, fatigue life, notch fatigue, Neuber's rule, multiaxial notch stress, fatigue notch factor

Paper ID: JTE10670J
DOI: 10.1520/JTE10670J
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