Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Geotechnical Constitutive Models in an Explicit, Dynamic Solution Scheme
This paper describes a procedure for implementation and calibration of elastic-plastic constitutive models for soils and rocks in an explicit, dynamic-solution (EDS) numerical scheme. The EDS scheme offers several advantages for the development and testing of geotechnical models. For example, extremely nonlinear constitutive models can be implemented and tested with this scheme in a straightforward fashion. Also, physical instability and path-dependent processes are followed directly and do not introduce numerical instability problems. The elastic-plastic numerical formulation in the EDS scheme is described, and an example implementation is presented for the Mohr-Coulomb constitutive model. Complex, nonlinear models can readily be implemented in an EDS scheme, such as hardening/softening models, and models accounting for both volumetric collapse and shear yield. It is also practical for modelers to incorporate variations of these models or develop their own constitutive models in an EDS scheme. This is important for model calibration purposes. Calibration of models implemented in this manner can be conducted by performing numerical tests that directly mimic laboratory tests (e.g., triaxial or direct shear tests) of a soil or rock specimen. An example is presented to illustrate this procedure.
Geotechnical Constitutive Models in an Explicit, Dynamic Solution Scheme
This paper describes a procedure for implementation and calibration of elastic-plastic constitutive models for soils and rocks in an explicit, dynamic-solution (EDS) numerical scheme. The EDS scheme offers several advantages for the development and testing of geotechnical models. For example, extremely nonlinear constitutive models can be implemented and tested with this scheme in a straightforward fashion. Also, physical instability and path-dependent processes are followed directly and do not introduce numerical instability problems. The elastic-plastic numerical formulation in the EDS scheme is described, and an example implementation is presented for the Mohr-Coulomb constitutive model. Complex, nonlinear models can readily be implemented in an EDS scheme, such as hardening/softening models, and models accounting for both volumetric collapse and shear yield. It is also practical for modelers to incorporate variations of these models or develop their own constitutive models in an EDS scheme. This is important for model calibration purposes. Calibration of models implemented in this manner can be conducted by performing numerical tests that directly mimic laboratory tests (e.g., triaxial or direct shear tests) of a soil or rock specimen. An example is presented to illustrate this procedure.
Geotechnical Constitutive Models in an Explicit, Dynamic Solution Scheme
Hart, Roger D. (Autor:in) / Detournay, Christine (Autor:in)
Geo-Frontiers Congress 2005 ; 2005 ; Austin, Texas, United States
Soil Constitutive Models ; 184-203
24.01.2005
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Geotechnical Constitutive Models in an Explicit, Dynamic Solution Scheme
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