| Autor: |
Dunin, S. Z., Sirotkin, V. K., Sumin, E. V. |
| Zdroj: |
Journal of Applied Mechanics and Technical Physics; May 1979, Vol. 20 Issue: 3 p373-380, 8p |
| Abstrakt: |
Substantial changes in the state of a solid medium can occur under the expansion of a gas cavity therein. In particular, rupture of the brittle rock occurs. The nature of the motion of the ruptured rock differs substantially from the nature of the motion of the unruptured medium. Thus, a change in the density of the ruptured rock occurs under shear strains. This phenomenon is usually called dilatancy [1]. In addition, the strength characteristics also change under rupture of the rock. The stress state of a medium in the neighborhood of an expanding cavity at the time of cessation is analyzed in this paper. The influence of the ruptured rock characteristics on the magnitude of the residual stress is investigated. The radius of the rupture zone is determined and its dependence on the characteristics of the medium is investigated. The volume of the threshold space in the neighborhood of the cavity being formed because of dilatancy is calculated. The nature of the stress state in elastic-plastic media which do not dilate under plastic flow is also investigated. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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