Determination of Effective Elastic Properties of Ferritic Ductile Cast Iron by Means Computational Homogenization, Micrographs and Microindentation Tests.

D.O.FERNANDINO; A. P. CISILINO; R. BOERI

MECHANICS OF MATERIALS

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2015 vol. 83 p. 110 - 121

0167-6636

A comprehensive procedure for the prediction of the elastic behavior of ferritic ductile iron by means of multiscale analysis is introduced in this work. The procedure combines com- putational procedures for the homogenization analysis, micrographic analysis to retrieve the geometries for the finite element analysis, and microindentation tests to assess the elastic behaviors of the different phases of the microstructure. The size of the representa- tive volume element (RVE) is assessed in terms of geometrical descriptors of the micro- structure (graphite fraction and nodule count and size) and the invariance and isotropy of the homogenized elastic responses. The RVE is sized to contain at least 50 nodules, and it results from 100􏰊 micrographs. The results for the homogenized values for the Young?s modulus and the Poisson?s ratio are found in excellent agreement to the data retrieved from tensile tests, values reported in the bibliography and analytical formulas available in the literature. The proposed procedure can be easily extended to the character- ization of cast irons with more complex microstructures.