The influence of the graphite mechanical properties on the constitutive response of a ferritic ductile cast iron – A micromechanical FE analysis

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Abstract

In the present paper a micro-mechanical approach is used to investigate the influence of the graphite mechanical properties on the loading response in the early deformation range of ductile cast iron. A periodic unit cell composed by a single graphite nodule embedded in a uniform ferritic matrix is considered and elasto-plastic behavior of both constituents is assumed; damage evolution in the ductile matrix is taken into account via Lemaitre’s isotropic model. Full 3D and 2D plane-stress finite element analyses are performed to simulate the loading conditions experienced by nodules located in the bulk as well as on the material surface. The effects of residual stresses arising during the manufacturing process are also accounted for. It is shown that the constitutive response of the equivalent composite medium can match ductile cast iron only if the graphite Young’s modulus value lies within a certain interval, which differs from that reported in previous works on the subject. Experimental support for the numerical results is provided.
Original languageEnglish
Title of host publicationProceedings of the XIII International Conference on Computational Plasticity : Fundamentals and Applications
EditorsE. Oñate, D.R.J. Owen, D. Peric, M. Chiumenti
PublisherInternational Center for Numerical Methods in Engineering
Publication date2015
Pages632-641
ISBN (Electronic) 978-84-944244-6-5
Publication statusPublished - 2015
EventXIII International Conference on Computational Plasticity: Fundamentals and Applications - Barcelona, Spain
Duration: 1 Sep 20153 Sep 2015
Conference number: 8

Conference

ConferenceXIII International Conference on Computational Plasticity
Number8
CountrySpain
CityBarcelona
Period01/09/201503/09/2015

Keywords

  • Computational Plasticity
  • damage
  • Ductile Cast Iron
  • Micro-mechanics

Cite this

Andriollo, T., Thorborg, J., & Hattel, J. H. (2015). The influence of the graphite mechanical properties on the constitutive response of a ferritic ductile cast iron – A micromechanical FE analysis. In E. Oñate, D. R. J. Owen, D. Peric, & M. Chiumenti (Eds.), Proceedings of the XIII International Conference on Computational Plasticity: Fundamentals and Applications (pp. 632-641). International Center for Numerical Methods in Engineering.