Jack, A.R. (1971). Fatigue Cracking from Stress Concentration in Mild Steel. PHD thesis, Aston University.
Abstract
Pulsating; tension fatigue tests have been carried out on edge notched specimens of a mild steel. An electrical potential drop technique was used to determine the number of cycles taken to initiate cracks and the rate at which the cracks grew across the specimen. The results could be described by the range of stress intensity factor, which for crack initiation was modified to take account of the notch root radius. Analysis of elastic stress distributions at cracks and notches and models of plasticity at crack tips are used to discuss the results. Limited evidence in the literature indicates that the fracture mechanics approach may provide a general description of crack initiation and growth in notched specimens, and a simple graphical method of calculating fatigue lives is described. The results are used to illustrate the effects of specimen size and geometry on the fatigue life of notched specimens. The relevance of the work to the assessment of the significance of defects in welds is discussed.
| Divisions: | College of Engineering & Physical Sciences > Aston Institute of Materials Research (AIMR) |
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| Additional Information: | Copyright © A.R. Jack, 1971. A.R. Jack asserts their moral right to be identified as the author of this thesis. This copy of the thesis has been supplied on condition that anyone who consults it is understood to recognise that its copyright rests with its author and that no quotation from the thesis and no information derived from it may be published without appropriate permission or acknowledgement. If you have discovered material in Aston Publications Explorer which is unlawful e.g. breaches copyright, (either yours or that of a third party) or any other law, including but not limited to those relating to patent, trademark, confidentiality, data protection, obscenity, defamation, libel, then please read our Takedown Policy and contact the service immediately. |
| Institution: | Aston University |
| Uncontrolled Keywords: | matallurgy,fatigue,mild steel,metal fatigue,steel,fatigue cracking |
| Last Modified: | 30 Sep 2024 08:15 |
| Date Deposited: | 13 Feb 2014 16:15 |
| Completed Date: | 1971-02 |
| Authors: |
Jack, A.R.
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