Abstract
A new model of dynamic spherical cavity expansion with constant velocity in a brittle material has been developed on the basis of the hypothesis of an ultimate fracture front velocity proposed by Nikolayevskii. With the use of this model, the Alekseevskii-Tate model is modified for long-rod penetration into brittle materials. The ultimate fracture front velocities relative to the material moving before this front are considered as a physical characteristic specific to every material and fracture mode. Therefore, fracture front velocities (as well as crack propagation velocities) relative to unperturbed material depend on the cavity expansion velocity and can exceed the Rayleigh wave velocity. Unlike the models based on the hypothesis of an ultimate fracture stress, this proposed model explains the possibility of short term “dynamic overloads” of the material: tensile in elastic precursor and shearing in the cracked material zone.
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.
