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ETDs @PUC-Rio
Estatística
Título: COMPUTATIONAL MODELING OF SHEAR BANDS IN PLUG SCALE
Autor: RENAN STROLIGO BESSA DE LIMA
Colaborador(es): DEANE DE MESQUITA ROEHL - Orientador
ROBERTO JUAN QUEVEDO QUISPE - Coorientador
Catalogação: 05/OUT/2021 Língua(s): PORTUGUESE - BRAZIL
Tipo: TEXT Subtipo: THESIS
Notas: [pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio.
[en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio.
Referência(s): [pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=55207&idi=1
[en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=55207&idi=2
DOI: https://doi.org/10.17771/PUCRio.acad.55207
Resumo:
Shear bands occur when inelastic shear deformation localize in narrow regions of the material. These structures can directly influence the properties of materials, in addition to affecting their integrity and contributing to the initiation of structural failures. This study presents a methodology for the characterization of shear bands in Indiana Limestone carbonate rock through numerical modeling using the finite element method (FEM). As it is known, the numerical modeling of strain localization phenomena using FEM has some drawbacks, such as loss of ellipticity of the governing equations, triggering convergence problems and results dependent on the mesh discretization. Some alternatives to overcome these problems are presented and discussed, giving a special emphasis to the viscous regularization technique used in the numerical modeling of biaxial and triaxial tests. Parametric and sensitivity studies were performed to identify the impact of the mechanical properties on the occurrence of shear bands. The results showed that strength properties, non associative flow rules and strain-softening are the factors with larger influence on the initiation and development of shear bands.
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