Symposium KMechanics of nanomaterials |
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Nano-structured solids are an attractive group of
modern engineering materials due to a range of properties in which
they are superior to their coarse grained counterparts. In
particular, this applies to their mechanical strength, fatigue
resistance, faster hydrogen storage kinetics, and a number of other
properties. In recent years, bulk nanomaterials suitable for
structural applications have emerged due to the development of
improved processing techniques, and there is a definite need to
address their mechanical response by developing physically based
nanomechanics.
Application of nanomaterials in new products hinges on a better
understanding of the phenomena that control their mechanical
properties. Simple extensions of the available models for mechanical
properties of conventional materials do not hold for the nano-scale
(cf. e.g. the breakdown of the Hall-Petch relationship). This calls
for novel approaches in this area. One of them has been based on the
concept of phase mixture modelling, while statistical methods have
also been proposed as an alternative. Modelling at deeper length
scales, including molecular dynamics and discrete dislocation, has
been advancing fast, and the results provide a solid platform for
developing constitutive models at a continuum level. A connection
between the macroscopic quantities, such as stress and strain, and
the properties at various length scales, including the nano scale,
often needs to be established for an adequate constitutive
description. A further important aspect is the non homogeneity of
nanomaterials. Many materials that may be regarded as homogeneous at
macro level exhibit heterogeneity at micro or nano level. Gradient
plasticity approaches may be a way of addressing this issue.
Most real materials are so complex and irregularly
heterogeneous that their description involves modelling in
probabilistic terms. Methods of the theory of random fields, both
continuous and discrete, are of special importance in this regard.
The aim of the Symposium is to provide a platform for
exchanging information on the recent development in the field of
mechanics of nanomaterials by bringing together diverse communities
engaged in this nascent field.
Topics:
1. Phase mixture modelling
2. Molecular dynamics simulations
3. Discrete dislocation dynamics
4. Description of random microstructures.
5. Stochastic modelling of nanomaterials.
6. Random microstructure and fracture.
7. Random microstructure and fatigue.
8. Random microstructure vs. macroscopic strain and stress
fields.
9. Gradient plasticity approaches.
Invited Speakers
Scientific Committee