Some Problems with Element Connectivity Matrix
Some Problems with Element Connectivity Matrix
(OP)
Hi All
trying to write the Element Connectivity matrix in MATLAB , reading about it somewhere , I have a bit of doubts that how it is done here , it say that it is done in a counter clockwise way , I don't see that , how ?
and also for example , for the node 1 it is mentioned that it is connected to node 2 which is a successive node . but for node 2 it is not mentioned . but this is not the same for node 4 , that is mentioned for the second time that node 2 is connected to node 4 and node 4 is connected to node 2
why is that ?
the structure
http://i61.tinypic.com/20rl4ax.jpg
the matrix
http://i60.tinypic.com/k1dfra.jpg
trying to write the Element Connectivity matrix in MATLAB , reading about it somewhere , I have a bit of doubts that how it is done here , it say that it is done in a counter clockwise way , I don't see that , how ?
and also for example , for the node 1 it is mentioned that it is connected to node 2 which is a successive node . but for node 2 it is not mentioned . but this is not the same for node 4 , that is mentioned for the second time that node 2 is connected to node 4 and node 4 is connected to node 2
why is that ?
the structure
http://i61.tinypic.com/20rl4ax.jpg
the matrix
http://i60.tinypic.com/k1dfra.jpg





RE: Some Problems with Element Connectivity Matrix
Its been a while for me, but at first glance at your matrix I am unsure about the third row entries.
RE: Some Problems with Element Connectivity Matrix
element 1, nodes: 1, 2, 3
element 2, nodes: 2, 4, 3
element 3, nodes: 3, 4, 5
element 4, nodes: 5, 4, 6
RE: Some Problems with Element Connectivity Matrix
so it would be different not ? still I don't get the rule , for triangular is understandable though , for truss , for me , not.
here is the source of it :
http://www.math.purdue.edu/~zcai/math615/matlab_fe...
I need to understand the way they have done the elem conn matrice .
then I don't get the equation 10 to 14
thank you very much
RE: Some Problems with Element Connectivity Matrix