The objective of this paper is to investigate the stress update algorithm and the tangent operator for an enhanced generalized plasticity model developed recently for partially saturated soils, where on top of the hydrostatic and deviatoric components of the (effective) stress tensor suction has to be considered as an independent variable. The soil model used for the applications can be derived from a potential energy function and is thermodynamically consistent. The Galerkin method is used to obtain a weak form of the governing equations and a " stress-suction coupling matrix" is derived in the discretization in space by finite element method. The implicit integration algorithm is incorporated in a code for partially saturated soil dynamics. The framework of generalized plasticity is presented and examples are shown including subsidence above a model gas reservoir.

Return mapping algorithm for an enhanced generalized plasticity constitutive model of partially saturated soils

SANTAGIULIANA, RAFFAELLA;SCHREFLER, BERNHARD
2012

Abstract

The objective of this paper is to investigate the stress update algorithm and the tangent operator for an enhanced generalized plasticity model developed recently for partially saturated soils, where on top of the hydrostatic and deviatoric components of the (effective) stress tensor suction has to be considered as an independent variable. The soil model used for the applications can be derived from a potential energy function and is thermodynamically consistent. The Galerkin method is used to obtain a weak form of the governing equations and a " stress-suction coupling matrix" is derived in the discretization in space by finite element method. The implicit integration algorithm is incorporated in a code for partially saturated soil dynamics. The framework of generalized plasticity is presented and examples are shown including subsidence above a model gas reservoir.
File in questo prodotto:
File Dimensione Formato  
Implicit_Integration_Algorithm_for_an_Enhanced_Generalized_Plasticity_Constitutive_Model_of_Partially_Saturated_Soils.pdf

accesso aperto

Descrizione: Caricato da Padua@research
Tipologia: Altro materiale allegato
Licenza: Accesso gratuito
Dimensione 298.73 kB
Formato Adobe PDF
298.73 kB Adobe PDF Visualizza/Apri
Return_Mapping_Algorithm_for_an_Enhanced_Generalized_Plasticity_Constitutive_Model_of_Partially_Saturated_Soils.pdf

accesso aperto

Descrizione: Caricato da Padua@research
Tipologia: Preprint (submitted version)
Licenza: Accesso gratuito
Dimensione 298.71 kB
Formato Adobe PDF
298.71 kB Adobe PDF Visualizza/Apri
Pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/2501787
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 5
  • ???jsp.display-item.citation.isi??? 4
  • OpenAlex ND
social impact