Using an energy analysis, the limiting or terminal crack velocity of a semi-infinite crack in an infinite medium is investigated. It is proposed that a crack will run in such a manner as to minimize the Lagrangian function of the surrounding medium. Contributions from plastic work are also included in the analysis. For a crack with a constant stress intensity factor, the terminal crack velocity is found to be 35% of the dilatational wave speed. Plastic work has only a slight effect on the final result, tending to increase the terminal speed.
Publisher
Department of Theoretical and Applied Mechanics. College of Engineering. University of Illinois at Urbana-Champaign
Series/Report Name or Number
TAM R 300
1967-0734
ISSN
0073-5264
Type of Resource
text
Language
eng
Permalink
http://hdl.handle.net/2142/112023
Sponsor(s)/Grant Number(s)
American Iron and Steel Institute, Committee on Properties of Iron and Steel
Copyright and License Information
Copyright 1967 Board of Trustees of the University of Illinois
TAM technical reports include manuscripts intended for publication, theses judged to have general interest, notes prepared for short courses, symposia compiled from outstanding undergraduate projects, and reports prepared for research-sponsoring agencies.
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