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Watching graphene buring and multilayer edge reconstructions

Submitted by Jianyu Huang on
research
graphene
in-situ TEM
TEM-SPM
edge reconstruction
sublimation
flat fullerene
nanopod
KMC
fractional nanotube
interconnected carbon nanostructures

PNAS 106, 10103 (2009), doi:10.1073/pnas.0905193106, http://www.youtube.com/watch?v=dPJBalMZ824&feature=channel_page,    http://www.nanowerk.com/news/newsid=11108.php

Post-doc Smoothed XFEM for Nano-CMOS Semi-Conductors Glasgow/Cardiff University

Submitted by Stephane Bordas on
xfem
nano
semi-conductors

A one-year post-doc is available in conjunction with

1) Prof. Asenov, University of Glasgow

2) Dr. Bordas, University of Glasgow/Cardiff

 to study the behaviour of nano-CMOS semi-conductors.

Please write to stephane dot bordas at g ma i l dot com 

 for details with your:

1) CV

2) Three references

3) a statement of why you are qualified and interested in this position

 You should

1) have a strong background in finite element methods

User subroutines in ABAQUS

Submitted by Nicholas Epiphaniou on
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Computational Mechanics Forum
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research

Dear All,



Could you suggest any literature or online step by step tutorial on how to create your own subroutines in ABAQUS like umeshmotion or umat. Any relevant information would be much appreciated. I am looking for information that are not covered in the ABAQUS manual.



Thanks very much in advace,



Nicholas


Geometric non linearity-peymann et all

Submitted by kajalschopra on
Forums
Computational Mechanics Forum

Consider attached file.It lists the details of the Timoshinko method for geometric non linear analysis.

Can anyone tell me how is it diiferent from incremental analysis conceptually?

Is it used commercially?Which method is more sophisticated-Timoshinko,incremental or Newton Raphson?

Please help

Question about curve fitting indentation data with large residual strain

Submitted by Yao Jiang on
Forums
Ask iMechanica
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I am trying to use finite element modeling of indentation experiments
to extract hyperelastic material parameters. I am having a dilemma,
when the tissue has residual strain, the model couldn't achieve the
high nonlinear relationship between displacement vs reaction force as
measured in the experiments.



I have tried several strain energy potentials,

1) W=A/B*{exp[B(I1-3)]-1}

2) W=C10(I1-3)+C01(I2-3) 

3) W=C10(I1-3)+C20(I1-3)^2+C30(I1-3)^3

4) Arruda-Boyce type model

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