Mueller 2 - final

Working version
Checked the displacement, equal to the results from the paper
Still didn't check the stress, check when plotting results
Mueller - 1

Working models
Manual change of coordinate with sweep of node
Remeshing
Not equal to the results from Muller's paper - but I'm pretty sure they
should be ok
Mueller 3 - SEN

Working example with J integral calculation and configurational force
comparison
Miehe - SEN

Check of configurational force comparison with J integral calculation