Estudo do comportamento mecânico de microestruturas de materiais compósitos com matriz metálica
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2017-07-28
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Universidade Federal de Goiás
Resumo
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.
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Citação
ANDRADE, P. V. Q. Estudo do comportamento mecânico de microestruturas de materiais compósitos com matriz metálica. 2017. 115 f. Dissertação (Mestrado em Geotecnia, Estruturas e Construção Civil) - Universidade Federal de Goiás, Goiânia, 2017.