INVESTIGADORES
CARAZO Fernando Diego
congresos y reuniones científicas
Título:
CHARACTERIZATION OF NODULAR CAST-IRON USING MULTI-SCALE CONSTITUTIVE MODELING
Autor/es:
FERNANDO DIEGO CARAZO; SEBASTIÁN MUGUEL GIUSTI; ADRIAN DANTE BOCCARDO; PATRICIA MÖNICA DARDATI; LUIS AUGUSTO GODOY
Lugar:
Rosario
Reunión:
Congreso; XIX Congreso sobre Métodos Numéricos y sus Aplicaciones; 2011
Institución organizadora:
FCEIA-IFIR-AMCA-CONICET
Resumen:
The constitutive properties of cast-iron
materials depend on the graphite morphology and the characteristics of the
metallic matrix. Specifically, in the nodular cast-iron, these properties are
affected by the spheroidicity of the graphite and the volume fractions of the
ferritic phase and pearlitic microconstituent. The constitutive properties of
such materials are usually presented by means of an analytical formula in terms
of micro-structural characteristics. In the derivation of an analytical
expression, the formulation of hypotheses are needed to define the behavior,
shape and distribution of the elements in the micro-structure. Then, the
analytical formulation to predict the constitutive behavior of the nodular cast-iron
is restricted to the micro-structures that satisfy such hypotheses. In the
present work, we use a computational constitutive multi-scale model to predict
the Young´s modulus of the pearlitic nodular cast-iron. In order to define an
adequate Representative Volume Element, we use a set of micrographics images,
obtained from an optical device. Each image is enhanced and segmented to obtain
the volume fraction of each phase and the boundary of each object in the
micrography. With this information, a finite element mesh is constructed for
each image. Finally, the numerical results are compared with an analytical
expression. Some conclusions are presented at the end of the work.