Publication Date:
1975-01-01
Description:
We examine dynamic propagation of a screw-type crack in relation to crack-resistance force, i.e., energy dissipation per unit extension. We show that a crack may have any terminal velocity only when the resistance force is proportional to crack length. In this case, the value of (1-ν/β), where v and β are, respectively, crack and shear wave velocities, gives a measure of the irreversible effect associated with the fracturing process. Next, we consider such a resistance force in relation to the deformational properties of material, and show that the linear dependence of the resistance force on crack length can be related to elastic-plastic properties. Finally, we try to apply these results to earthquake mechanism studies. © 1975, The Seismological Society of Japan, The Volcanological Society of Japan, The Geodetic Society of Japan. All rights reserved.
Print ISSN:
0022-3743
Electronic ISSN:
1884-2305
Topics:
Geosciences
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