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    Development and Implementation of a Constitutive Model for Unsaturated Sands

    Source: International Journal of Geomechanics:;2017:;Volume ( 017 ):;issue: 011
    Author:
    T. Sutharsan
    ,
    B. Muhunthan
    ,
    Yilong Liu
    DOI: 10.1061/(ASCE)GM.1943-5622.0001004
    Publisher: American Society of Civil Engineers
    Abstract: The development and implementation of a constitutive model used to predict the behavior of unsaturated sands are described. The model is based on critical state and bounding surface concepts and incorporates parameters to account for sand fabric and suction. The model was implemented into finite-element software using user-defined mechanical material behavior (UMAT) subroutine. The model performance was verified with a wide range of triaxial test data that included different drainage conditions, sample preparation methods, densities, confining stresses, and modes of shear. Simulation results show that saturation level significantly affects sand performance and a modified suction-based state parameter is proposed to describe better such sand behavior. This parameter was found to correlate well with an increase in peak stress caused by a decrease in saturation level.
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      Development and Implementation of a Constitutive Model for Unsaturated Sands

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4239828
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    contributor authorT. Sutharsan
    contributor authorB. Muhunthan
    contributor authorYilong Liu
    date accessioned2017-12-16T09:11:54Z
    date available2017-12-16T09:11:54Z
    date issued2017
    identifier other%28ASCE%29GM.1943-5622.0001004.pdf
    identifier urihttp://138.201.223.254:8080/yetl1/handle/yetl/4239828
    description abstractThe development and implementation of a constitutive model used to predict the behavior of unsaturated sands are described. The model is based on critical state and bounding surface concepts and incorporates parameters to account for sand fabric and suction. The model was implemented into finite-element software using user-defined mechanical material behavior (UMAT) subroutine. The model performance was verified with a wide range of triaxial test data that included different drainage conditions, sample preparation methods, densities, confining stresses, and modes of shear. Simulation results show that saturation level significantly affects sand performance and a modified suction-based state parameter is proposed to describe better such sand behavior. This parameter was found to correlate well with an increase in peak stress caused by a decrease in saturation level.
    publisherAmerican Society of Civil Engineers
    titleDevelopment and Implementation of a Constitutive Model for Unsaturated Sands
    typeJournal Paper
    journal volume17
    journal issue11
    journal titleInternational Journal of Geomechanics
    identifier doi10.1061/(ASCE)GM.1943-5622.0001004
    treeInternational Journal of Geomechanics:;2017:;Volume ( 017 ):;issue: 011
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian