Non‐uniqueness of critical state line in compression and extension conditions
Identifieur interne : 000941 ( Main/Exploration ); précédent : 000940; suivant : 000942Non‐uniqueness of critical state line in compression and extension conditions
Auteurs : Zhen U Yin [États-Unis] ; Ching S. Chang [États-Unis]Source :
- International Journal for Numerical and Analytical Methods in Geomechanics [ 0363-9061 ] ; 2009-07.
English descriptors
Abstract
Experimental evidence has indicated that the critical state line determined from undrained compression tests is not identical to that determined from undrained extension tests. The purpose of this paper is to investigate a modelling method that accounts for the non‐uniqueness of critical state lines in the compression and the extension testing conditions. Conventional elastic–plastic cap models can predict only a unique critical state line for the compression and the extension tests. A new micromechanical stress–strain model is developed considering explicitly the location of critical state line. The model is then used to simulate undrained triaxial compression and extension tests performed on isotropically consolidated samples with different over‐consolidated ratios. The predictions are compared with experimental results as well as that predicted by models with kinematic hardening of yield surface. All simulations demonstrate that the proposed micromechanical approach is capable of modelling the undrained compression and the undrained extension tests. Copyright © 2009 John Wiley & Sons, Ltd.
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DOI: 10.1002/nag.770
Affiliations:
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Chang</name><affiliation wicri:level="4"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Civil and Environmental Engineering, University of Massachusetts, Amherst, MA 01002</wicri:regionArea><placeName><region type="state">Massachusetts</region><settlement type="city">Amherst (Massachusetts)</settlement></placeName><orgName type="university">Université du Massachusetts</orgName></affiliation></author></analytic><monogr></monogr><series><title level="j">International Journal for Numerical and Analytical Methods in Geomechanics</title><title level="j" type="abbrev">Int. J. Numer. Anal. Meth. Geomech.</title><idno type="ISSN">0363-9061</idno><idno type="eISSN">1096-9853</idno><imprint><publisher>John Wiley & Sons, Ltd.</publisher><pubPlace>Chichester, UK</pubPlace><date type="published" when="2009-07">2009-07</date><biblScope unit="volume">33</biblScope><biblScope unit="issue">10</biblScope><biblScope unit="page" from="1315">1315</biblScope><biblScope unit="page" to="1338">1338</biblScope></imprint><idno type="ISSN">0363-9061</idno></series><idno type="istex">D637CC4CD6004089B3E07B47E0AE0F6DA2400D23</idno><idno type="DOI">10.1002/nag.770</idno><idno type="ArticleID">NAG770</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0363-9061</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>clays</term><term>constitutive relations</term><term>critical state</term><term>extension test</term><term>micromechanics</term><term>plasticity</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Experimental evidence has indicated that the critical state line determined from undrained compression tests is not identical to that determined from undrained extension tests. The purpose of this paper is to investigate a modelling method that accounts for the non‐uniqueness of critical state lines in the compression and the extension testing conditions. Conventional elastic–plastic cap models can predict only a unique critical state line for the compression and the extension tests. A new micromechanical stress–strain model is developed considering explicitly the location of critical state line. The model is then used to simulate undrained triaxial compression and extension tests performed on isotropically consolidated samples with different over‐consolidated ratios. The predictions are compared with experimental results as well as that predicted by models with kinematic hardening of yield surface. All simulations demonstrate that the proposed micromechanical approach is capable of modelling the undrained compression and the undrained extension tests. Copyright © 2009 John Wiley & Sons, Ltd.</div></front></TEI><affiliations><list><country><li>États-Unis</li></country><region><li>Massachusetts</li></region><settlement><li>Amherst (Massachusetts)</li></settlement><orgName><li>Université du Massachusetts</li></orgName></list><tree><country name="États-Unis"><region name="Massachusetts"><name sortKey="Yin, Zhen U" sort="Yin, Zhen U" uniqKey="Yin Z" first="Zhen U" last="Yin">Zhen U Yin</name></region><name sortKey="Chang, Ching S" sort="Chang, Ching S" uniqKey="Chang C" first="Ching S." last="Chang">Ching S. Chang</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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