Influence of microstructure morphology on multi-scale modeling of low-alloyed TRIP-steels
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
Acknowledgements
The authors greatly appreciate the financial funding by the German Science Foundation (Deutsche Forschungsgemeinschaft, DFG) as part of the priority program “Polymorphic uncertainty modelling for the numerical design of structures” (SPP 1886), project BA2823/12-1, and as part of the Institutional Strategy “The Synergetic University” at TU Dresden. Moreover, the access to the computer cluster “Taurus,” provided by the ZIH at the TU Dresden, is also gratefully acknowledged.
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
Publisher
:Emerald Publishing Limited
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