Abstract
A simulation of fatigue crack propagation from a hole or crack under combined axial and torsional loading was conducted on the basis of the maximum tangential stress criterion for determining the crack path. The simulation results of the crack propagation path were compared with the experimental results obtained from fatigue tests by using thin-walled tubular specimens made of a medium-carbon steel. Fatigue cracks are nucleated at the position of the maximum of the amplitude of the tangential stress around the hole, and propagated straight away from the hole. The path of fatigue crack propagation from a hole or a crack followed the direction perpendicular to the maximum of the range of the tangential stress, Δσ*θmax, near the crack tip calculated from the stress intensity ranges by considering the contact of crack faces near the minimum load. The crack path predicted from the Δσ*θmax criterion was very close to that calculated from the maximum of the total range of the tangential stress, Δσθmax, calculated by neglecting the crack face contact. The superposition of static mode II shear loading changes slightly the propagation path of a crack propagating under uniaxial tension compression. This deviation is caused by the generation of cyclic mode II component due to the zigzag shape of a fatigue crack.
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: 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.
