The initiation of fatigue cracks from notches in mild steel plates

✍ Scribed by A. R. Jack; A. T. Price

• Publisher: Springer Netherlands
• Year: 1970
• Tongue: English
• Weight: 454 KB
• Volume: 6
• Category: Article
• ISSN: 1573-2673
• DOI: 10.1007/bf00182628

✦ Synopsis

Pulsating tension fatigue tests have been carried out on edge-notched specimens of a mild steel and measurements of electrical potential drop across notches have been used to determine the number of cycles to initiate cracks. The results can be described by using the range of stress intensity factor for the sharp crack situation modified to take into account the notch root radius.

The models of plastic relaxation at a crack tip and analyses of the elastic stress distribution at cracks and notches are used to discuss the results. Limited evidence in the literature indicates that the stress intensity approach may, provide a general description of crack initiation and propagation in notched specimens.