3D Mesh with hexahedral finite elements

Hi,

I want to plot a 3D mesh using hexahedral elements with 8-nodes. I have two files: 1. nodes for cube 2. coordinates (x,y,z) of each node

So far I have used the "trisurf" function to plot the same problem in 2D and it worked out perfectly fine. But in 3D the elements are not fully connected to each other.

How can I plot the mesh?

Thx in advance

Answer 1

[Friedrich]

Hi,

Doing a triangulation for hexahedral elements wont work well I think. I would go for the patch command here, e.g.:

http://www.mathworks.com/help/releases/R2011a/techdoc/visualize/f2-11758.html

http://www.mathworks.com/help/releases/R2011a/techdoc/visualize/f2-698.html

[Araceli]

Thx though!

Answer 2

[Araceli]

It won't work, since patch only creates one patch at a time with neighboring nodes. For example my first element has nodes {1,2,57,56,12,13,68,67} and the second element {2,3,58,57,13,14,69,68}.

I programmed following lines, but a warning pops out: "Values in patch Faces must be in [1:rows(Vertices)]

    for j=1:size(n4e,1)
       P = n4e(j,:);
       [faces_matrix,vertices_matrix]=create_patch(P);
        patch('Vertices',vertices_matrix,'Faces', faces_matrix);
    end

Answer 3

[Longying Xiao]

Hey.. have you solved the problem?