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Doctoral Thesis
DOI
10.11606/T.3.2014.tde-26082014-105410
Document
Author
Full name
Luciano Valdomiro dos Santos
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2014
Supervisor
Committee
Gonçalves, Edison (President)
Andrade, Arnaldo Homobono Paes de
Laier, José Elias
Schön, Cláudio Geraldo
Souza, Gilberto Francisco Martha de
Title in Portuguese
Análise de falha de estruturas metal-polímero: enrijecedores à flexão.
Keywords in Portuguese
Enrijecedores à flexão
Fadiga
Abstract in Portuguese
Este trabalho apresenta um novo modelo de análise de falha em estruturas metal-polímero que, além de considerar a falha independente no metal ou no polímero, leva em consideração a falha na região de interface metal-polímero em decorrência de desgaste por deslizamento, quando existe movimento relativo entre as superfícies. Inicialmente, o estudo apresenta as principais características dos metais e polímeros e os mecanismos de falha mais relevantes. Faz a proposta do modelo de análise de falha e por último, apresenta a análise completa de falha de enrijecedores à flexão, uma estrutura metal-polímero utilizada pela indústria de óleo e gás. O modelo proposto permite fazer a previsão da taxa de desgaste de polímeros por deslizamento em função do ângulo da aspereza da superfície metálica, em situações onde a falha é gerada por fadiga de alto ciclo.
Title in English
Failure analysis of metal-polymer-metal structures: bending stiffeners.
Keywords in English
Bending stiffeners
Fatigue
Abstract in English
This work presents a new model for evaluating the failure in polymer-metal structures that, besides considering the isolated failure in metal or polymer, considers the failure in the polymer-metal interface region due to sliding wear, when there is relative movement between the surfaces. Initially, the study presents the main characteristics of metals and polymers and the most relevant failure mechanisms. Makes the proposed failure analysis model and, finally, shows the complete analysis of failure in bending stiffeners, a polymer-metal structure used by the oil and gas industry. The proposed model allows the prediction of the wear rate of polymers by sliding a function of asperity´s angle of the metal surface in situations where failure is generated by high cycle fatigue.
 
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Publishing Date
2014-08-26
 
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