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    Viscoplastic Cap Model for Soils under High Strain Rate Loading

    Source: Journal of Geotechnical and Geoenvironmental Engineering:;2007:;Volume ( 133 ):;issue: 002
    Author:
    Xiaoli Tong
    ,
    Christopher Y. Tuan
    DOI: 10.1061/(ASCE)1090-0241(2007)133:2(206)
    Publisher: American Society of Civil Engineers
    Abstract: A viscoplastic cap model of the Perzyna type was developed for simulating high strain rate behaviors of soils. An associative viscous flow rule was used to represent time-dependent soil behaviors. The viscoplastic cap model was validated against experimental data from static and dynamic soil tests. The model was also compared with soil behaviors under creep and stress relaxation with good agreement. However, the model was unable to represent tertiary creep where strain softening became significant. The model was subsequently integrated into LS-DYNA for finite-element simulations of high strain rate behaviors of sandy and clayey soils in explosive tests. The significance of strain rate effect on the soil responses is presented herein. It is concluded that the viscoplastic cap model is adequate for simulations of soil behaviors under high strain rate loading, creep, and stress relaxation, covering a wide range of time-dependent problems.
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      Viscoplastic Cap Model for Soils under High Strain Rate Loading

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    http://yetl.yabesh.ir/yetl1/handle/yetl/53092
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    • Journal of Geotechnical and Geoenvironmental Engineering

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    contributor authorXiaoli Tong
    contributor authorChristopher Y. Tuan
    date accessioned2017-05-08T21:28:50Z
    date available2017-05-08T21:28:50Z
    date copyrightFebruary 2007
    date issued2007
    identifier other%28asce%291090-0241%282007%29133%3A2%28206%29.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/53092
    description abstractA viscoplastic cap model of the Perzyna type was developed for simulating high strain rate behaviors of soils. An associative viscous flow rule was used to represent time-dependent soil behaviors. The viscoplastic cap model was validated against experimental data from static and dynamic soil tests. The model was also compared with soil behaviors under creep and stress relaxation with good agreement. However, the model was unable to represent tertiary creep where strain softening became significant. The model was subsequently integrated into LS-DYNA for finite-element simulations of high strain rate behaviors of sandy and clayey soils in explosive tests. The significance of strain rate effect on the soil responses is presented herein. It is concluded that the viscoplastic cap model is adequate for simulations of soil behaviors under high strain rate loading, creep, and stress relaxation, covering a wide range of time-dependent problems.
    publisherAmerican Society of Civil Engineers
    titleViscoplastic Cap Model for Soils under High Strain Rate Loading
    typeJournal Paper
    journal volume133
    journal issue2
    journal titleJournal of Geotechnical and Geoenvironmental Engineering
    identifier doi10.1061/(ASCE)1090-0241(2007)133:2(206)
    treeJournal of Geotechnical and Geoenvironmental Engineering:;2007:;Volume ( 133 ):;issue: 002
    contenttypeFulltext
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