Influence of microstructure morphology on multi-scale modeling of low-alloyed TRIP-steels

Stefan Prüger (Institute of Mechanics and Shell Structures, Technical University Dresden, Dresden, Germany)
Ashutosh Gandhi (Institute of Mechanics and Shell Structures, Technical University Dresden, Dresden, Germany)
Daniel Balzani (Institute of Mechanics and Shell Structures, Technical University Dresden, Dresden, Germany and Dresden Center for Computational Material Science, Dresden, Germany)

Engineering Computations

ISSN: 0264-4401

Publication date: 16 April 2018

Abstract

Purpose

The purpose of this study is to quantify the impact of the variation of microstructural features on macroscopic and microscopic fields. The application of multi-scale methods in the context of constitutive modeling of microheterogeneous materials requires the choice of a representative volume element (RVE) of the considered microstructure, which may be based on some idealized assumptions and/or on experimental observations. In any case, a realistic microstructure within the RVE is either computationally too expensive or not fully accessible by experimental measurement techniques, which introduces some uncertainty regarding the microstructural features.

Design/methodology/approach

In this paper, a systematical variation of microstructural parameters controlling the morphology of an RVE with an idealized microstructure is conducted and the impact on macroscopic quantities of interest as well as microstructural fields and their statistics is investigated. The study is carried out under macroscopically homogeneous deformation states using the direct micro-macro scale transition approach.

Findings

The variation of microstructural parameters, such as inclusion volume fraction, aspect ratio and orientation of the inclusion with respect to the overall loading, influences the macroscopic behavior, especially the micromechanical fields significantly.

Originality/value

The systematic assessment of the impact of microstructural parameters on both macroscopic quantities and statistics of the micromechanical fields allows for a quantitative comparison of different microstructure morphologies and a reliable identification of microstructural parameters that promote failure initialization in microheterogeneous materials.

Keywords

Citation

Prüger, S., Gandhi, A. and Balzani, D. (2018), "Influence of microstructure morphology on multi-scale modeling of low-alloyed TRIP-steels", Engineering Computations, Vol. 35 No. 2, pp. 499-528. https://doi.org/10.1108/EC-01-2017-0009

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Publisher

:

Emerald Publishing Limited

Copyright © 2018, Emerald Publishing Limited

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