Abstract
Continuum damage mechanics is an effective approach to model ductile failure. The same concepts can be extended to the low cycle fatigue damage process, where plasticity is still the key mechanism for crack initiation. In addition, in low cycle fatigue a relevant part of life is spent by the material to initiate a macroscopic crack that leads to complete failure. In this paper, the nonlinear damage model, initially proposed by Bonora, N. (1997) A non-linear CDM model for ductile fracture Engineering Fracture Mechanics (in press), is extended to the case of cyclic loading. Three possible formulations are proposed and discussed that take into account in different ways the accumulation of damage, plastic strain and the material cyclic properties change. Fully coupled life model was used to predict low cycle fatigue life in AI 2024 T3 alloy and HY80 low carbon steel. Comparison with a large fatigue experimental data set is also presented.
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.
