Entrop?a aplicada a la fatiga

A thermodynamic approach has been recently developed to assess the fatigue behaviour of materials, considering that this mode of failure is a degradation process resulting on the generation of entropy due to plastic deformation, heat transfer and other irreversibilities. Several works have been done...

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Main Author: Andrade Acosta, Luis Gilmour
Other Authors: Davey, Keith
Format: Tesis de Maestría
Language:eng
Published: M?nchester / Universidad de Manchester / 2014 2016
Subjects:
Online Access:http://repositorio.educacionsuperior.gob.ec/handle/28000/2653
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spelling oai:localhost:28000-26532017-02-21T20:24:38Z Entrop?a aplicada a la fatiga Andrade Acosta, Luis Gilmour Davey, Keith MEC?NICA DE MATERIALES ENTROP?A TERMODIN?MICA DA?O MEC?NICO DISIPACI?N DE ENERG?A PL?STICA A thermodynamic approach has been recently developed to assess the fatigue behaviour of materials, considering that this mode of failure is a degradation process resulting on the generation of entropy due to plastic deformation, heat transfer and other irreversibilities. Several works have been done to validate the theoretical framework with experimental observations, based on the determination of entropy generation. A numerical model using a FEM-based commercial package is developed in this study, in order to determine the mechanical and thermal response of an element subjected to cyclic loads. The model is validated by comparing the gathered numerical data with published experimental results for aluminium 6061-T6 under different loading amplitudes. The thermodynamic and mechanical framework, as well as computational issues to model the phenomenon are discussed in this paper. El estudio realizado consisti? en la simulaci?n del comportamiento thermo-mec?nico de un elemento sometido a cargas c?clicas, mediante el uso de software comercial basado en el m?todo de elementos finitos para la evaluaci?n de la fatiga del aluminio, utilizando un m?todo basado en la generaci?n de entrop?a que est? asociada a la degradaci?n del material. Los resultados obtenidos en esta simulacion se validaron con las observaciones experimentales llevadas a cabo por investigadores de la Universidad de Luisiana, cuyos resultados fueron publicados en 2011. Para alcanzar este objetivo, se model? el comportamiento elast-pl?stico del material, para obtener resultados num?ricos de la cantidad de energ?a disipada. Con estos resultados se procedi? a modelar la evoluci?n de temperatura, con lo cual fue posible determinar la entrop?a acumulada cuando se produce en la falla del material 2016-10-31T21:23:54Z 2016-10-31T21:23:54Z 2014-09 masterThesis Andrade Acosta, Luis Gilmour (2014). Entrop?a aplicada a la fatiga. (Trabajo de Titulaci?n de M?ster en Dise?o en Ingenier?a Mec?nica). Universidad de M?nchester. M?nchester. 72 p. http://repositorio.educacionsuperior.gob.ec/handle/28000/2653 eng 72 p. M?nchester / Universidad de Manchester / 2014
institution SENESCYT
collection Repositorio SENESCYT
biblioteca Biblioteca Senescyt
language eng
format Tesis de Maestría
topic MEC?NICA DE MATERIALES
ENTROP?A TERMODIN?MICA
DA?O MEC?NICO
DISIPACI?N DE ENERG?A PL?STICA
spellingShingle MEC?NICA DE MATERIALES
ENTROP?A TERMODIN?MICA
DA?O MEC?NICO
DISIPACI?N DE ENERG?A PL?STICA
Andrade Acosta, Luis Gilmour
Entrop?a aplicada a la fatiga
description A thermodynamic approach has been recently developed to assess the fatigue behaviour of materials, considering that this mode of failure is a degradation process resulting on the generation of entropy due to plastic deformation, heat transfer and other irreversibilities. Several works have been done to validate the theoretical framework with experimental observations, based on the determination of entropy generation. A numerical model using a FEM-based commercial package is developed in this study, in order to determine the mechanical and thermal response of an element subjected to cyclic loads. The model is validated by comparing the gathered numerical data with published experimental results for aluminium 6061-T6 under different loading amplitudes. The thermodynamic and mechanical framework, as well as computational issues to model the phenomenon are discussed in this paper.
author2 Davey, Keith
author_facet Davey, Keith
Andrade Acosta, Luis Gilmour
author Andrade Acosta, Luis Gilmour
author_sort Andrade Acosta, Luis Gilmour
title Entrop?a aplicada a la fatiga
title_short Entrop?a aplicada a la fatiga
title_full Entrop?a aplicada a la fatiga
title_fullStr Entrop?a aplicada a la fatiga
title_full_unstemmed Entrop?a aplicada a la fatiga
title_sort entrop?a aplicada a la fatiga
publisher M?nchester / Universidad de Manchester / 2014
publishDate 2016
url http://repositorio.educacionsuperior.gob.ec/handle/28000/2653
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score 11,871979