The influence of anisotropy on compaction bands: The case of coaxiality between stress and fabric anisotropy tensors
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F22%3A00548059" target="_blank" >RIV/61388998:_____/22:00548059 - isvavai.cz</a>
Result on the web
<a href="https://onlinelibrary.wiley.com/doi/10.1002/nag.3291" target="_blank" >https://onlinelibrary.wiley.com/doi/10.1002/nag.3291</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/nag.3291" target="_blank" >10.1002/nag.3291</a>
Alternative languages
Result language
angličtina
Original language name
The influence of anisotropy on compaction bands: The case of coaxiality between stress and fabric anisotropy tensors
Original language description
Compaction bands are localized failure patterns that appear in highly porous rock material under the effect of relatively high confining pressure. Being affected mainly by volumetric compression, these bands appear to be almost perpendicular to the most compressive principal stress of a stress state at the so-called “cap” of the yield surface (YS). In this study, we focus on the mechanismnthat leads to the onset of compaction bands by using a viscoplasticity model able to describe the post-localization response of these materials. The proposed constitutive framework is based on the overstress theory of Perzyna (1966) and the anisotropic clay plasticity model of Dafalias (1986), which provides not only the necessary “cap” of the YS, but introduces a rotational hardening (RH)mechanism, thus, accounting for the effect of fabric anisotropy. Following the analysis of Veveakis and Regenauer-Lieb (2015), we identify the compaction bands as “static” cnoidal wave formations in the medium that occur at a post-yield regime, and we study the effect of rotational and isotropic hardening on their onset. Moreover, we determine a theoretical range of confining pressures in triaxial compression tests for the compaction bands to develop. Under the assumption of coaxiality between stress and anisotropy tensors, the results show thatnthe isotropic hardening promotes compaction localization, whereas the RH hasna slightly negative effect on the onset of compaction localization.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20101 - Civil engineering
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
International Journal for Numerical and Analytical Methods in Geomechanics
ISSN
0363-9061
e-ISSN
1096-9853
Volume of the periodical
46
Issue of the periodical within the volume
1
Country of publishing house
US - UNITED STATES
Number of pages
21
Pages from-to
68-88
UT code for WoS article
000711583400001
EID of the result in the Scopus database
2-s2.0-85118207922