1207 Through Scale Numerical Modeling of Mechanical Behavior of Ultrafine-grained (UFG) and Nanostructured (NS) Materials

Janusz Majta, AGH University of Science and Technology
Krzysztof Muszka, AGH University of Science and Technology
Lukasz Madej, AGH University of Science and Technology
This minisymposium aims at recent development in computer modeling techniques dedicated for novel, re-engineered metallic materials that are characterized by introduced, gradual changes into their ultrafine-grained and nano-structures with the main objective to enhance the mechanical behavior through special variations of loading conditions.
UFG, NC and NS materials have already passed their first tests for industrial maturity. Recently, new experimental and in-situ diagnostic techniques, coupled with advanced microstructure characterization techniques, are starting to allow for the detailed study of complex mechanical action (elastic and plastic deformation, impact, fatigue etc.) and what is crucial to its linkage to microstructure. Moreover, these experimental advancements have been accompanied by the radical changes in analytical capabilities enabled by modern computers.
The weight of large-scale computations has given an amazing predictive capability to the field and an ability to incorporate large data sets collected by modern experiments into mathematical models. Present material model development - in general, and UFG or nanostructured – in particular, is largely dependent on continuum scale phenomena and ignores the rich multiscale physical and chemical phenomena that are responsible for the macro-scale mechanical response of a polycrystalline metal. The substantial complexity of these phenomena, which occur through the evolution of microstructure and texture in response to various loading, presents formidable challenges to theoretical model development in computational mechanics and is a field for Integrated Computational Material Engineering (ICME).
Thus, participation in this mini-symposium will help to understand and control properties of mentioned group of structural materials with fundamental and practical interest from the bottom-up by developing and using new advancements in computational mechanics.
The aim of this mini-symposium is to address through scale challenges in development of numerical methods designed for numerical modelling of UFG, NC and NS materials. Researchers addressing following topics are invited to submit their contribution:

- New computational mechanics tools based on materials physics in order to predict more accurately material properties of UFG, NS and NC (e.g. efficient solvers for microstructure-based simulation: Lippman-Schwinger (FFT, SLS,…), image based modelling, …).
- Alternative multi scale methods: e.g. combination of the CA-FE method, MC-FE, Phase field finite element, Level set finite element, Crystal plasticity finite element, etc.
- Theoretical basis of various numerical methods for multi-scale analysis techniques, such as Homogenization Method (HM), Monte Carlo (MC) method, Cellular Automata (CA) method, Molecular Dynamics (MD), Dislocation Dynamics (DD), etc.
- Multiscale approaches for ICME applications in UFG, NS and NC materials.