Simulação computacional em escala microestrutural de compósitos cerâmicos
Abstract
The study of ceramic composites assisted by computer simulation is well spread
nowadays. It is an interest of the ceramic industry the development of materials
models trustfully enough to reduce cost with prototypes and virtually explore
an infinitude of materials compositions and thermomechanical loads. The mismatch
of thermal and mechanical properties among the composite’s phases may
induce decohesions or cracks after temperature variation. The computer modeling
of this behavior could auxiliate the planning of the systems’ composition, as
it becomes possible to evaluate the influence of the concentration of an specific
constituent on the global behavior. The present dissertation aims to analyze the
role of the geometrical feature, such as inclusion radius and volume fraction, in
the composite behavior submitted to temperature variation. It was also analyzed
the application of coesive elements to simulate the cracking phenomena in
ceramic systems. The main results of this dissertation were not only the thermomechanical
properties influence on the global behavior of ceramic systems, but
also the construction of finite element models that might be usefull to others reseachers
on the investigation of the thermomechancial behavior of distincts ceramic
systems.