Abstract
Ratchetting behaviour and its influence on the subsequent low cycle fatigue behaviour of a plain carbon steel (SA 333 Gr. 6) has been evaluated. Uniaxial stress controlled ratchetting experiments have been carried out at various combinations of mean stress and stress amplitudes. It is noted that the ratchetting strain increased with increasing mean stress and stress amplitude. Maximum strain accumulation was observed for the highest value of the peak stress, irrespective of the stress ratio. Further, post ratchetting-low cycle fatigue (LCF) tests have been carried out and compared with non-ratchetted base LCF behaviour. The comparison showed that the fatigue life decreased in proportion to the accumulated ratchetting strain. This indicates that accumulation of significant ratchetting strain can be detrimental to the fatigue life and must be avoided. Mean stress induced due to pre-ratchetting is found to be responsible for the decrease in LCF fatigue life.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: International Journal of Pressure Vessels and Piping
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
