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Advisor(s)
Abstract(s)
A utilizaĆ§Ć£o dos materiais compĆ³sitos, estĆ” cada vez mais difundida pelas vĆ”rias Ć”reas da engenharia. Esta crescente importĆ¢ncia, leva Ć necessidade do estudo aprofundado destas estruturas. Um dos vĆ”rios mĆ©todos desenvolvidos para o estudo do comportamento destes materiais, baseia-se numa abordagem multicamada. Com o intuito de estudar o comportamento estĆ”tico e dinĆ¢mico, de diferentes estruturas constituĆdas por estes materiais, foram implementados dois modelos nas aplicaƧƵes de computaĆ§Ć£o simbĆ³lica e numĆ©rica, MapleĀ®e MatLabĀ®. Os cĆ³digos implementados, permitem anĆ”lises estĆ”ticas,anĆ”lises de vibraƧƵes livres, e ainda a aplicaĆ§Ć£o de critĆ©rios de falha nomeadamente, o critĆ©rio de Hashin, Tsai-Hill e TensĆ£o MĆ”xima. A validaĆ§Ć£o das implementaƧƵes destes modelos, foi realizada recorrendo-se a soluƧƵes analĆticas e numĆ©ricas. Foram realizados a nĆvel estĆ”tico, e das vibraƧƵes livres, diferentes estudos da influĆŖncia de diferentes parĆ¢metros no comportamento da estrutura. Os cĆ³digos implementados, permitem assim obter um campo de tensƵes e de deformaƧƵes ao longo da espessura, usando uma abordagem mais precisa comparativamente a metodologias de camada equivalente.
Abstract: The use of composite materials, is increasingly widespread in the various areas of engineering. This growing importance, leads to the need for further study of these structures. One of the numerous methods developed to study the behavior of these materials is based on a multilayer approach. In order to study the static and dynamic behavior of different structures comprised of these materials, two models have been implemented in symbolic and numerical computation applications MapleĀ®and MatLabĀ®. The implemented code, allows carrying out static analysis, free vibration analysis and also the application of failure criteria, namely Hashin, Tsai-Hill and Maximum Stress criteria. The validation of these models were performed making use of analytical and numerical solutions. Different static and free vibrations studies were performed to analysethe influence of different parameters on the behavior of the structure. The implemented codes allow stress and strain field along the thickness, using a more precise approach when compared to other equivalent single layer methodologies.
Abstract: The use of composite materials, is increasingly widespread in the various areas of engineering. This growing importance, leads to the need for further study of these structures. One of the numerous methods developed to study the behavior of these materials is based on a multilayer approach. In order to study the static and dynamic behavior of different structures comprised of these materials, two models have been implemented in symbolic and numerical computation applications MapleĀ®and MatLabĀ®. The implemented code, allows carrying out static analysis, free vibration analysis and also the application of failure criteria, namely Hashin, Tsai-Hill and Maximum Stress criteria. The validation of these models were performed making use of analytical and numerical solutions. Different static and free vibrations studies were performed to analysethe influence of different parameters on the behavior of the structure. The implemented codes allow stress and strain field along the thickness, using a more precise approach when compared to other equivalent single layer methodologies.
Description
Trabalho final de mestrado para obtenĆ§Ć£o do grau de Mestre em Engenharia MecĆ¢nica
Keywords
MĆ©todo dos elementos finitos Finite element method Teoria Layerwise Layerwise theory Estruturas Sandwich Sandwich structures CompĆ³sitos laminados Laminated composites
Citation
VENĆNCIO, Marco AndrĆ© dos Santos - Comportamento de estruturas compĆ³sitas usando uma abordagem multicamada. Lisboa: Instituto Superior de Engenharia de Lisboa, 2017. DissertaĆ§Ć£o de mestrado.
Publisher
Instituto Superior de Engenharia de Lisboa