Título: | AN IMPLEMENTATION OF THE EXTENDED FINITE ELEMENT METHOD FOR ANALYSIS OF TWO-DIMENSIONAL FRACTURE PROPAGATION | ||||||||||||||||||||||||||||||||||||||||
Autor: |
PATRICK ANDERSON BAHIA VIEIRA DA SILVA |
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Colaborador(es): |
DEANE DE MESQUITA ROEHL - Orientador |
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Catalogação: | 29/JAN/2016 | Língua(s): | PORTUGUESE - BRAZIL |
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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. |
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Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=25699&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=25699&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.25699 | ||||||||||||||||||||||||||||||||||||||||
Resumo: | |||||||||||||||||||||||||||||||||||||||||
The Extended Finite Element Method (XFEM) is a powerful technique for
the explicit modeling of fractures. This method has the background of the Finite
Element Method and is based on the Partition Unity Method. The essential idea of
the method is the addition of enrichment functions to the displacement field
approximation for the representation of the discontinuities in the model. The crack
geometry is modeled independently of the mesh and remeshing with crack growth
is unnecessary. This thesis presents an ABAQUS implementation of XFEM
through the UEL subroutine for two-dimensional analysis of fracture propagation
following the Linear Elastic Fracture Mechanics theory. Fracture propagation
occurs in an automatic procedure. The fracture criterion is based on the stress
intensity factors. The domain form of the interaction integral was used for the
computation of the stress intensity factors and the maximum circumferential stress
criterion was used to determine the fracture propagation direction. The model was
applied to the analysis of the propagation of fractures in structures of quasi-brittle
material. The implementation shows good results in the prediction of the fracture
propagation trajectories and proves the efficiency of the XFEM in Mode I and
mixed mode fracture analyzes.
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