Aplicaciones del método de elementos discretos en mecánica de fractura estática y dinámica
The fault and fracture processes in structures continue being a challenging problem in Mechanics. For this reason they must be taken into account in the security analysis of the structures. In addition they play a very important role in the development of new materials, as much for the knowledge...
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Formato: | Tesis de maestría |
Lenguaje: | Español |
Publicado: |
Universidad Nacional del Nordeste. Facultad de Ingeniería
2020
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Materias: | |
Acceso en línea: | http://repositorio.unne.edu.ar/handle/123456789/484 |
Aporte de: |
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I48-R184-123456789-484 |
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record_format |
dspace |
institution |
Universidad Nacional del Nordeste |
institution_str |
I-48 |
repository_str |
R-184 |
collection |
RIUNNE - Repositorio Institucional de la Universidad Nacional del Nordeste (UNNE) |
language |
Español |
topic |
Mecánica aplicada Fractura estática Métodos de elementos discretos |
spellingShingle |
Mecánica aplicada Fractura estática Métodos de elementos discretos Kosteski, Luis Eduardo Aplicaciones del método de elementos discretos en mecánica de fractura estática y dinámica |
topic_facet |
Mecánica aplicada Fractura estática Métodos de elementos discretos |
description |
The fault and fracture processes in structures continue being a challenging problem in
Mechanics. For this reason they must be taken into account in the security analysis of the
structures. In addition they play a very important role in the development of new materials, as
much for the knowledge of their durability as for their resistance.
It is not only possible to obtain the fracture parameters but also to characterize the fissure
subcritical propagation of solids through many methodologies of analysis, both analytic and
numerical ones. But when it is desired to determine the fracture parameters and the fracture
configuration considering the unstable propagation of fissures, the problem is far from being
trivial.
In the simulation of the unstable propagation of a fault, the classical methods like the Finite
Element Method (FEM) or the Boundary Element Method (BEM) present difficulties because
they are based on the hypothesis of the continuous means. In this context the Discrete
Element Method (DEM) is presented as an efficient alternative for the study of this kind of
problems.
The DEM consists of representing the continuum as a regular arrangement of reticulate bars
where they have a rigidity equivalent to the part of the continuum they intend to represent.
The mass is discrete and concentrated in the nodes that join the bars, which have a
constitutive relation related with the fracture energy of the modeled material. The resulting
movement equation is integrated in time with an algorism of explicit integration. This process
can very easily represent the fracture and/or propagation processes.
In this work are, in the first place, presented examples of how to obtain static fracture
parameters. Secondly, various problems in 2 and 3 dimensions about the calculus of the
intensity factors of dynamic tension. And finally, the fissure unstable propagation is
reproduced compared with the solutions presented by other authors.
With these examples the capacity of the MED is demonstrated to obtain the static and
dynamic FIT in addition to the speed and direction of the propagation of fissures and
configurations of breakage. |
author2 |
Iturrióz, Ignacio |
author_facet |
Iturrióz, Ignacio Kosteski, Luis Eduardo |
format |
Tesis de maestría |
author |
Kosteski, Luis Eduardo |
author_sort |
Kosteski, Luis Eduardo |
title |
Aplicaciones del método de elementos discretos en mecánica de fractura estática y dinámica |
title_short |
Aplicaciones del método de elementos discretos en mecánica de fractura estática y dinámica |
title_full |
Aplicaciones del método de elementos discretos en mecánica de fractura estática y dinámica |
title_fullStr |
Aplicaciones del método de elementos discretos en mecánica de fractura estática y dinámica |
title_full_unstemmed |
Aplicaciones del método de elementos discretos en mecánica de fractura estática y dinámica |
title_sort |
aplicaciones del método de elementos discretos en mecánica de fractura estática y dinámica |
publisher |
Universidad Nacional del Nordeste. Facultad de Ingeniería |
publishDate |
2020 |
url |
http://repositorio.unne.edu.ar/handle/123456789/484 |
work_keys_str_mv |
AT kosteskiluiseduardo aplicacionesdelmetododeelementosdiscretosenmecanicadefracturaestaticaydinamica |
bdutipo_str |
Repositorios |
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1764820539757559808 |