Project A7: Crystal plasticity and macroscopic modeling of cold-formable multi-phase steels

Motivation and objectives:
Computational homogenization approaches using finite element models of the microstructure and material models in the framework of crystal plasticity are a flexible tool to investigate the relations between the microstructure and the properties of polycrystalline materials. It is the goal of this work to use microscale simulations in order to predict the macroscopic properties of sheet metals that are often anisotropic. With the results of the simulations it is possible to choose and calibrate suitable macroscopic plasticity models to simulate forming processes.

• Development and assessment of methods for the generation of suitable microstructure models used in computational homogenization
• Virtual materials testing: determination of material properties using constitutive models within the crystal plasticity framework
• Deep-drawing: forming simulations using phenomenological plasticity models and comparison with experiments

• Implementation of a crystal plasticity model
• Microstructure models of a dual-phase steel considering the crystallographic texture and a statistically equivalent distribution of martensite
• Prediction of anisotropic properties (r-values) for DP600 using computational homogenization
• Prediction of residual stresses from forming simulations of cylindrical cups and comparison with A13