Face # of a contium soild element based on node numbering

[Cansand]

My plane strain quadrilateral element is numbered as follows

44 43



6 7

I want to know the number of the face 43-7 (is it 1 or 2 or 3 or 4)

Thank you

 

[bassmanjax]

At a guess, 2, but it will say in the element library (in the Users Manual) how the face identifiers are worked out.

Also, you can plot face id's in Viewer - it's one of the plot options.

Martin

 

[sendy]

hi helppoorpeople,

the face number depends on how you build your element. As in your example:

1. if your element be built as 6-7-43-44, then 7-43 would be face 2.

2. if your element be built as 7-6-44-43, then 43-7 would be face 4.

3. if your element be built as 44-43-7-6, then 43-7 would be face 2.

4. if your element be built as 43-44-6-7, then 7-43 would be face 4.

regards,
sendy.

 

[bassmanjax]

Helppoorpeople

Look at section 22.1.3 in the Analysis Users Manual. At the bottom of that section, it shows exactly how the face numbering is done based on the node numbers.

Regards

Martin

 

[Cansand]

I looked at the paragraph:
"Node ordering and face numbering on elements" in the Analysis Users Manual
It doesnot help..I do not know if you can you figure it out from this paragraph ..can you?
I think one has to observe the order of meshing in this case

 

[sendy]

yes, the face number depends on the order of your meshing.
It is stated in the manual that:

Face 1 is on the 1st and the 2nd nodes,
Face 2 is on the 2nd and the 3rd nodes,
Face 3 is on the 3rd and the 4th nodes,
Face 4 is on the 4th and the 1st nodes.

Pay attention on the order of the node numbering.

regards.

 

[Cansand]

Well.. It still unclear... Let us say that you have a concerned region of 1 element (which you concern about knowing its faces IDs) surrounded by other regions . Now when you mesh this region, specific numbering will be given to its nodes and when you mesh a surrounding region the node of the concerned region will be altered and again when you mesh another surrounding region the numbering of this concerned region will be altered again and so on. What a puzzle is … The Doc is not clear about that , some cards that you need to insert in the job Edit Keyword requires you to know the face #

Thanks