Constitutive modelling of refractories at liquid steel temperature

Reference Presenter Authors
14-005 Davide Bigoni Bigoni, D.(University of Trento); The design of refractories at the levels of temperature involved in the steel production industry requires the development of appropriate constitutive models.
Based on a mechanical characterization of these materials, obtained with experiments developed with specifically designed testing apparatuses working at high temperature, constitutive laws are formulated, describing the mechanical behaviour of refractories at the liquid steel temperature.  In particular, a damage surface for ceramic materials is proposed, equipped with temperature dependent yield and thermoinelastic hardening laws capable of describing the behaviour of ceramics at high temperature. Implementation of the constitutive model in a UMAT routine for ABAQUS is developed and finally the model is validated against experiments.
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