Thesis-2006-McGee.pdf (14.29 MB)
Download fileMultiscale modelling of nanoindentation
thesis
posted on 2018-10-18, 09:24 authored by Edward McGeeThe process of nanoindentation causes physical phenomena not only at the
nano-scale, but at multiple length scales up to the macroscopic. This thesis
investigates multiscale modelling of nanoindentation that links atomistic
scale molecular dynamics (MD) to a finite element (FE) model in order to
extend the length scales that can be modelled. Existing multiscale models
are investigated and the relevant advantages and disadvantages of each are
discussed. New coupling techniques are developed in both 2D and 3D, which
are applied to nanoindentation test simulations to verify the models.
A new force attribution 3D multiscale model is applied to some studies of
nanoindentation of Au and Fe. The results are compared to those obtained
through experiment and to atomistic only models to investigate the effect of
the embedding continuum region. These studies show that by extending the
length scales, long range effects of nanoindentation can be modelled in the
far field by continuum mechanics giving results that are in closer agreement
with the experiment. The new coupling method has wide application and
a study of laser ablation of Au has been carried out to show that the multiscale
modelling technique can be used to improve the description of this
phenomenon also.
History
School
- Science
Department
- Mathematical Sciences
Publisher
© Edward McGeePublisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2006Notes
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy at Loughborough University.Language
- en