Micromechanics of hierarchical materials: a brief overview

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Paper by: Leon Mishnaevsky Jr.

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Abstract: A short overview of micromechanical models of hierarchical materials (hybrid composites, biomaterials, fractal materials, etc.) is given. Several examples of the modeling of strength and damage in hierarchical materials are summarized, among them, 3D FE model of hybrid composites with nanoengineered matrix, fiber bundle model of UD composites with
hierarchically clustered fibers and 3D multilevel model of wood considered as a gradient, cellular material with layered composite cell walls. The main areas of research in micromechanics of hierarchical materials are identified, among them, the investigations of the effects of load redistribution between reinforcing elements at different scale levels, of the possibilities to control different material properties and to ensure synergy of strengthening effects at different scale levels and using the nanoreinforcement effects. The main future directions of the mechanics of hierarchical materials are listed, among them, the development of ?concurrent?modeling techniques for hierarchical materials, optimal microstructure design at multiple scale levels using synergy effects, and the mechanical modeling of atomistic effects.

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This paper is published in the following international journal:

Mishnaevsky Jr., Micromechanics of hierarchical materials: a brief overview, Reviews  on  Advanced  Materials Science, 30 (2012) 60-72.

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Leon Mishnaevsky Jr, is a Senior Scientist at the Department of Wind Energy, Technical University of Denmark. Author of 3 monographs (”Micromechanics and Nanosimulation”, Springer, ” Computational Mesomechanics of Composites”, Wiley) and more than 120 research papers in peer reviewed journals. L.M. has been a Principal Investigator in a number of projects, including the EU FP7 Project "Virtual Nanotitanium", Columbia -Stanford-DTU network "Multiscale multiphysics computational mechanics", Danish-Japanese project " Graphene and CNT based composites", Sino-Danish project “ High reliability of large wind turbines via computational micromechanics ", Danish-Nepali project “ Wind energy technologies in Nepal ”, and others. Leader of Work Package “Nano/Micromechanics” in "Danish Centre for Composite Structures and Materials for Wind Turbines”. Chairman/Organizer of many international symposia and conferences, including Symposium on Multiscale Computational Analysis of Complex Materials (MCACM), 2017, Denmark, on Nanoengineered composites, 2015, Roskilde, Denmark, on Materials for Wind Energy Applications, 2012, Beijing, International Conference on Computational Modelling of Nanostructured Materials (ICCMNM-2013), Frankfurt am Main, Germany, 3-6.9.2013 and others. LM has held visiting professor/visiting scholar positions at M.I.T. and Rutgers (USA), University of Tokyo (Japan) and Ecole Nationale Superieure d'Arts et Metiers (France). Prior to joining Risø, he worked as a Heisenberg Fellow (”portable associate professorship” of German Research Council) at the University of Stuttgart, and at the Darmstadt University of Technology. He received his doctorate from the USSR Academy of Sciences, and his Dr. - Habil. degree in Mechanics from the Darmstadt University of Technology, Germany.

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