Abstract
The present study evaluates ratcheting response of pressurized elbow pipes made of three steel alloys of austenitic stainless steel, 1020 steel, and 304L stainless steel subjected to external bending under load-controlled conditions by means of the Ahmadzadeh-Varvani (A-V) hardening rule. The model enabled ratcheting assessment of elbows in different directions mainly due to parameters implemented in the dynamic recovery term. The internal variable b¯ in the model calibrated the backstress evolution over stress cycles and along with Macaulay functions controlled non-proportionality, directionality, and plastic shakedown over ratcheting progress in elbow pipes. A finite element model was employed to evaluate stress components at various positions on the elbow midsection. Experimental ratcheting data measured by strain gauges at different elbow positions of crown, intrados, and extrados closely agreed with those of ratcheting strains predicted based on the A-V model.
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.
