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Damage and microstructural change in geophysical materials under high compression and shear

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AuthorSearch for: ; Search for: ; Search for: ORCID identifier: https://orcid.org/0000-0002-0975-8884
FormatText, Article
ConferenceThe Second International Conference on Structural Engineering, Mechanics and Computation, July 5-7, 2004, Cape Town, South Africa
Abstract
Recent developments in studies of the mechanics of progressive breakdown of structure in geophysical materials under compression are discussed. Ice has been used as a reference material in experimental studies. The breakdown occurs under high stresses comprising both hydrostatic pressure and shear in zones that form as a result of fracture processes without geostatic pressure. The change in structure includes extensive microcracking and recrystallization at lower confining pressure and recrystallization together with other softening processes at higher confining pressures. The latter include pressure melting in the case of ice. The softening process at higher confining pressures leads to a cyclic failure process at certain loading rates. The m1crofracturing and recrystallization at lower pressures are similar to cataclasis, while the recrystallization at high pressures is similar to mylonlle formation in geology. Computer analysis of the process of interaction with mdenters has been conducted using the methods of damage mechanics, with positive results.
Publication date
PublisherTaylor & Francis
In
  • Progress in Structural Engineering, Mechanics and Computation: Proceedings of the Second International Conference on Structural Engineering, Mechanics and Computation, Cape Town, South Africa, 5-7 July 2004 (2004): 1103–1107.
LanguageEnglish
Peer reviewedYes
NRC publication
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Record identifierd4e7ba50-d521-44e8-825b-3462a2a0081e
Record created2019-05-13
Record modified2021-03-26
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