How to create readable files from Matlab to Paraview to display structural deformation?

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Xiaohan Du
Xiaohan Du 2017-9-27
评论： Xiaohan Du 2017-9-28
Hello,
I'm really new to Paraview, I'd like to create a plot in Paraview showing the displacement of a rectangular mesh. I use this function "vtkwrite" to export the vtk file:
https://www.mathworks.com/matlabcentral/fileexchange/47814-vtkwrite---exports-various-2d-3d-data-to-paraview-in-vtk-file-format
I wrote this line:
vtkwrite('cantiBeam', 'polydata','triangle', xdis, ydis, z, tri);
where cantiBeam is the file name, polydata is the datatype, triangle is the element type, xdis is the deformed x coordinate, ydis is the deformed y coordinate, z is set to 0 as this is a 2d structure. tri is the connectivity.
I successfully plot this structure in Paraview like this (I used random deformation just to demonstrate):
However, I'd like to plot the deformation with colors, e.g. dark color for large deformations, for example, like in Abaqus:
I guess when creating vtk file, there needs to be the information to tell Paraview what the deformation is, but how can I do it?
Thanks!

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回答（1 个）

KSSV
KSSV 2017-9-27
It can be very much plotted......Check this file exchange for more details: https://in.mathworks.com/matlabcentral/fileexchange/32719-postprocessing-in-fem. Any more questions feel free to discuss.
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Xiaohan Du
Xiaohan Du 2017-9-28
First, the speed was quite slow, this structure only has 2298 nodes, if there are tens of thousands of nodes or more, would Matlab be too slow for this job?
Second, I cannot find a way to display the deformation like you did in here https://in.mathworks.com/matlabcentral/fileexchange/32719-postprocessing-in-fem
I'd like to have a contour plot of deformation like you did for this wing model.
Xiaohan Du
Xiaohan Du 2017-9-28
Also, in this link:
https://www.mathworks.com/matlabcentral/fileexchange/47814-vtkwrite---exports-various-2d-3d-data-to-paraview-in-vtk-file-format
I tried the attached example:
d = [-1 1];
[x, y, z] = meshgrid(d, d, d);
DT = delaunayTriangulation(x(:), y(:), z(:));
vtkwrite('execute', 'polydata','tetrahedron', x, y, z, DT.ConnectivityList);
It did generate a VTK file, but the plot in Paraview was like this:
obviously these are not tetrahedrons but triangular surfaces. How can I change it?

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