Abstract
Mild steel (SAE 1015) plate specimens with central circular holes were used to study crack propagation in the inelastic strain region. These thin plates were subjected to completely reversed constant amplitude cyclic strains in a servocontrolled testing machine. Fatigue crack propagation results in the inelastic strain region showed that the rate of crack growth is a polynomial function of the equivalent stress intensity factor developed in this work. The relation is similar to the equation proposed by Paris and Erdogan for an elastic case and describes crack propagation rates for both elastic and inelastic strain levels. The equivalent (or modified) stress intensity factor indirectly represents actual crack tip stresses and strains and reduces to the elastic stress intensity factor. With the aid of the results of the present study, other methods proposed by various investigators for predicting crack propagation rates are also discussed.
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 callDisclaimer: 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.
