Abstract
The CED (Crack Energy Density) in an arbitrary direction, E ϕ , is defined as the quantity which has the meaning of strain energy area density in the plane containing a crack front line without any restriction on constitutive equation. We may expect that, as far as the opening type fracture occurs, a mixed mode crack begins to grow in the direction ϕ where E ϕ I (mode I contribution of E ϕ ) takes the maximum value, E ϕmax I , when E ϕmax I reaches a critical value peculiar to a material (we call this criterion E ϕmax I criterion). In this paper, the applicability of this E ϕmax I criterion to elastic-plastic fractures is studied based on the fracture experiments on specimens of Aluminum alloy with a crack inclined to the loading axis and it is demonstrated that the onset and the direction of crack growth can be estimated by E ϕmax I criterion in either case of fractures with relatively small yielding region and those with large yielding region. The applicability of E ϕmax I criterion to elastic (quasi-elastic) fractures is also shown through the comparison of the result by E ϕmax I criterion with the results by other criteria and experimental results.
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.
