Abstract
Mode II fatigue crack growth has been investigated for a high strength bearing steel, SUJ2, using a specially prepared fixture developed by Fujii et al. The fixture could apply large T-stress, i.e. compressive stress component parallel to the crack surface, which enabled us to grow the fatigue crack to the pure mode II direction. Detailed experiments for mode II as well as conventional mode I fatigue crack growth were performed, and the characteristics were compared. In order to investigate the net characteristics of mode II fatigue crack growth, deformation fields near the crack tip were measured under mode II loading by ESPI (Electronic Speckle Pattern Interferometry) method and used to derive effective stress intensity factor range using nonlinear least-squires based on Newton-Raphson method. The results revealed that the mutual contact of the crack surfaces reduced the crack driving force and the crack growth rate simultaneously. The mode II fatigue crack growth rate exhibited remarkable scatter due to the crack surface contacts at the deflected path of the mode II fatigue cracks.
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: Journal of the Society of Materials Science, Japan
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.
