Abstract
The analytical treatment of dislocation emission at crack tips based on the Peierls concept is critically reviewed. Most treatments are based on the balance of stresses and must make a number of simplifying assumptions. Of special importance is to obtain the correct atomic interaction potential in the emission plane. In the literature, there exist some inconsistencies when combining the continuum concept of linear elastic fracture mechanics with the atomistic considerations of the Peierls model. It is also important to include the energy of ledge formation. Both aspects have a considerable influence on the critical stress intensity for dislocation emission and modify the γ us criterion of Rice. It is shown that these shortcomings can be overcome by treating dislocation emission as a variational problem of the crack energy.
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.
