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Multiphysics Couplings and Strain Localization in Geomaterials
This chapter reviews some multiphysics couplings which enhance strain localization in geomaterials. It focuses on shear banding, emphasizing thermal and chemical effects in relation with shear heating. A comparison between a rate‐dependent Cauchy continuum and a rate‐independent Cosserat continuum is shown for the scaling of the localized zone thickness. The comparison is made on the basis of a simplified example in order to illustrate the main differences and aspects of each modeling strategy. The chapter also focuses on compaction band formation in porous materials triggered by dissolution as an example of another type of chemomechanically induced strain localization. A strong chemomechanical coupling is considered: the material softens in due course of dissolution, whereas the dissolution process accelerates with increasing damage.
Multiphysics Couplings and Strain Localization in Geomaterials
This chapter reviews some multiphysics couplings which enhance strain localization in geomaterials. It focuses on shear banding, emphasizing thermal and chemical effects in relation with shear heating. A comparison between a rate‐dependent Cauchy continuum and a rate‐independent Cosserat continuum is shown for the scaling of the localized zone thickness. The comparison is made on the basis of a simplified example in order to illustrate the main differences and aspects of each modeling strategy. The chapter also focuses on compaction band formation in porous materials triggered by dissolution as an example of another type of chemomechanically induced strain localization. A strong chemomechanical coupling is considered: the material softens in due course of dissolution, whereas the dissolution process accelerates with increasing damage.
Multiphysics Couplings and Strain Localization in Geomaterials
Stefanou, Ioannis (participant) / Sulem, Jean (participant)
Instabilities Modeling in Geomechanics ; 253-277
2021-04-12
25 pages
Article/Chapter (Book)
Electronic Resource
English
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