Hello,
I'm trying to plot the stresses in colour of a strained isoparametric
element.
I have a six noded triangle with vertice coordinates
[(xa1,ya1),(xa2,ya2),(xa3,ya3)] = pos_a
This triangle deforms and the new coordinate positions are
[(xb1,yb1),(xa2,yb2),(xb3,yb3)] = pos_b
The remaining nodes are mid nodes also with rest and deformed coordinate
positions.
To plot the edges of the triangle I use a Jacobian transformation function
so that the coordinates of the triangle are in Jacobian coordinates xi1 and
xi2 (with xi3 = 1 - xi1 - xi2). This is required as the elements are
quadratic with mid-nodes.
Each interval is hard coded so that:
xi1 = [1.0,0.9,0.8,0.7,0.6,0.5, etc..]
xi2 = [0.0,0.1,0.2,0.3,0.4,0.5, etc..]
I would like to plot the strains in colour so that the interior of the
triangle is filled but I don't want to hard code the Jacobian intervals as
this seems an awkward way of doing it.
With strain as a function of xi1 and xi2, How can matplotlib provide a
continuous interior strain plot of the triangle for all the xi1 and xi2
values from 0 to 1?
Regards
Alex Naysmith
My finite element program can be downloaded from here:
http://www.pynw.org.uk/Talks?action=AttachFile&do=view&target=2D_FEA.zip
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