University of Illinois Urbana-Champaign

Effect of Notches on the Axial Fatigue Properties of Structural Steels

Sahgal, R.K.; Stallmeyer, J.E.; Munse, W.H.

Content Files
SRS-177.pdf

Permalink

https://hdl.handle.net/2142/13730

Description

Title
Effect of Notches on the Axial Fatigue Properties of Structural Steels
Author(s)
  • Sahgal, R.K.
  • Stallmeyer, J.E.
  • Munse, W.H.
Issue Date
1963-03
Keyword(s)
  • Axial fatigue properties
  • Steel, Structural
  • Notch effect
Date of Ingest
2009-09-11T16:35:57Z
Abstract
The effect of the stress concentration on the zero-to-tension axial fatigue strength of notched members of four structural steels has been studied. For each of the four steels a critical notch severity was found at which a transition in behavior takes place. When the theoretical stress concentration exceeds this critical value the fatigue strength increases instead of continuing to decrease as would normally be expected. The maximum effective stress concentration determined from these tests corresponds to a critical notch severity which is dependent on the material) the geometry of the specimen) and the cyclic conditions of stress. Microscopic examinations of the roots of the notched specimens which did not fail revealed cracking in most cases. Some of the cracks apparently were nonpropagating cracks but the test lives in most cases were insufficient to isolate such cracks positively as non-propagating. A study of other data on non-propagating cracks revealed that the laws governing their formation are not yet fully understood. However, there are indications that the increase in fatigue strength obtained above the critical notch severity is coincident with the formation of non~propagating cracks.
Publisher
University of Illinois Engineering Experiment Station. College of Engineering. University of Illinois at Urbana-Champaign.
Series/Report Name or Number
Civil Engineering Studies SRS-177
Type of Resource
text
Genre of Resource
Technical Report
Language
en
Permalink
http://hdl.handle.net/2142/13730
Sponsor(s)/Grant Number(s)
  • The Engineering Foundation
  • American Iron and Steel Institute
  • Chicago Bridge and Iron Foundation
  • The Welding Research Council

Owning Collections

Civil Engineering Studies: Structural Research Series PRIMARY