Estudo do comportamento mecânico de microestruturas de materiais compósitos com matriz metálica

• Ano de defesa: 2017
• Autor(a) principal: Andrade, Paula Viana Queiroz
• Orientador(a): Pituba, José Júlio de Cerqueira
• Banca de defesa: Martins, Carlos Humberto, Pituba, José Júlio de Cerqueira, Soares, Renata Machado
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Goiás
• Programa de Pós-Graduação: Programa de Pós-graduação em Geotecnia, Estruturas e Construção Civil (EEC)
• Departamento: Escola de Engenharia Civil - EEC (RG)
• País: Brasil
• Palavras-chave em Português: Compósito de matriz metálica; Plasticidade; Fratura coesiva; Elemento de volume representativo
• Palavras-chave em Inglês: Metallic matrix composite; Plasticity; Cohesive fracture; Representative volume element
• Área do conhecimento CNPq: ENGENHARIA CIVIL::ESTRUTURAS
• Link de acesso: http://repositorio.bc.ufg.br/tede/handle/tede/7710

This work deals with analysis of the microstructures composed of metal matrix composites (MMC) and its application in Structural Engineering. The main goal of this essay is considered the potentialities and limitations when using the modeling activity suggested. For this, it is intended to consider the dissipative processes of plastification, occurring in the matrix, and phase debonding, that occurs in the matrix/inclusion interface region, where the influence of such processes on the macroscopic response of the material will be investigated. Initially, the applicability of this material in the various Engineering areas is described. For the numerical simulations of the MMC structural behavior, the von Mises model is used in the modeling of the matrix and a cohesive fracture model is used in the simulation of the phase debonding process. Inclusion is considered elastic with great rigidity. However, the dissipative processes that occur in the microstructure and that affect the macro mechanical behavior of the material are analyzed through a microscale modeling using a homogenization process based on the concept of Representative Volume Element (RVE) and the Finite Element Method (FEM). The strain and deformation are volumetric means of the respective microscopic fields on the EVR. The general objective is to verify through numerical analysis the potentialities and limitations of the use of the proposed modeling for future applications of metallic matrix composites in engineering, which shows a good representativeness of the mechanical behavior of the CMM.