SYMPOSIA PAPER Published: 01 January 1970
STP26853S

Improvement in the Fatigue Strength of Notched Bars by Compressive Self-stresses

Source

In this investigation the long-life fatigue strength of sharply notched steel bars was improved by as much as 300 percent with the introduction of compressive self-stresses. Compressive self-stresses were produced by an axial tensile preload. Quantitative estimates of this improvement were made as a function of preload using suitable failure criteria and an analytical estimate of the stable self-stress distribution. The importance of the distribution in depth is demonstrated. A criterion for predicting crack propagation is improved and clarified.

Author Information

Gerber, TL
General Electric Co., San Jose, Calif.
Fuchs, HO
Stanford University, Stanford, Calif.
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Details
Developed by Committee: E08
Pages: 276–295
DOI: 10.1520/STP26853S
ISBN-EB: 978-0-8031-4587-0
ISBN-13: 978-0-8031-0030-5