RVE-size Estimation and Efficient Microstructure-based Simulation of Dual-Phase Steel

Abstract

Dual-phase steel shows a pronounced structure-property correlation, caused by its internal structure consisting of a
soft ferrite matrix and embedded hard martensite regions. Due to its high strength combined with high ductility, dual-phase
steel is particularly suitable for energy-absorbing and strength-relevant sheet metal applications, but its use as heavy plate is
also desirable. Due to the complex microstructure, microstructure-based simulation is essential for a realistic simulation of the
mechanical properties of dual-phase steel. This paper describes two important points for the microstructure-based simulation of
dual-phase steel. First a method for the straightforward experimental estimation of the RVE size based on hardness measurements
prior to tomography preparation is presented and evaluated. Secondly, a method for the efficient meshing of these microstructures,
based on material definition at the integration points of a finite element model, is developed.