Multi-Scale Modeling of the Thermo-Mechanical Behavior of Cast Iron

Abstract This work presents a multi-scale modelling framework for thermo-mechanical behaviour of Compacted Graphite Iron cast iron. A general thermo-elasto-visco-plastic model is developed to describe the matrix (pearlite) behavior under cyclic loading, which parameters are identified from tests on pearlitic steel. The pearlite takes into account temperature dependent rate-dependency and kinematic hardening. importance properly accounting graphite anisotropy emphasised, numerical procedure estimating local directions particle geometry experimental observations proposed. high quality conforming finite element mesh generated representative volume using discrete voxelized microstructural data in combination with signed distance functions interfaces. For fully constraint thermal loading conditions different holding times, capabilities demonstrated at both scales: macroscale, where simulation results very good agreement data, microscale, providing evolution fields.