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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

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    20101 - Civil engineering

Result continuities

  • Project

  • 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