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Master's Dissertation
DOI
10.11606/D.18.2017.tde-10042017-130608
Document
Author
Full name
Gilberto Pereira de Souza
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2003
Supervisor
Committee
Carvalho, Jonas de (President)
Aguiar, Adair Roberto
Massaroppi Junior, Ernesto
Title in Portuguese
Avaliação de critérios de falhas de compósitos poliméricos reforçados aplicados a vigas sob carregamento de flexão
Keywords in Portuguese
Carregamento de flexão
Compósitos
Critérios de falhas
Método dos elementos finitos
Abstract in Portuguese
Este trabalho apresenta um estudo de aplicabilidade de diferentes critérios de falhas para materiais compósitos poliméricos reforçados, especificamente laminados compostos de fibras unidirecionais, submetidos a carregamento de flexão. Consiste inicialmente de um levantamento bibliográfico para descrever os principais mecanismos de falhas e como estes podem ser analisados. É realizada uma avaliação dos principais critérios de falhas existentes, em estudos de casos de vigas do material submetidas a esforços de flexão três pontos. Para tal avaliação utilizou-se o método dos elementos finitos, devido à complexidade da análise de tensões em compósitos poliméricos reforçados. Posteriormente foram implementadas rotinas computacionais para o cálculo de alguns dos critérios de falhas encontrados na literatura. Assim, analisou-se as potencialidades e limitações desses critérios nos estudos de caso abordados.
Title in English
Evaluation of failure criteria for reinforced composite materials applied on beams submited to flexural loads
Keywords in English
Composite
Failure criteria
Finite element method
Flexural loads
Abstract in English
This work presents a study about the applicability of different failure criteria for laminated reinforced composite materials made of unidirectional fibers, under flexural loads. First, it is described the failure mechanisms of this material, and how this can be evaluated. Some of the most important failure criteria are tested for beams under flexural loads. Because of the complexity of composite stress analysis, it was used the Finite Element Method. After that, some computational routines were implemented to calculate the failure criteria. The advantages and limitations of these theories could be verified for the flexural case studies.
 
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Publishing Date
2017-04-11
 
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