[ GiDlist ] Order of gauss points for 2D quad elements
Posted: Tue Sep 25, 2001 8:45 am
Hello,
The Gauss Points order and local axis position for Triangle and
Quadrilaterals are given on the page 185 of the GiD Reference Manual. On
this page the order of a 3x3 scheme is also pictured. The file of the GiD
Reference Manual (HTML, PDF and PS version) can be dowloaded at
http://gid.cimne.upc.es/download/do05.html
Regards
Valdenir de Souza Junior
Centro de Mecânica Aplicada e Computacional - CEMACOM
Federal University of Rio Grande do Sul - UFRGS
Porto Alegre, Brazil
At 23:12 24/09/01 +0100, you wrote:
Hello,
What is the numbering order used by GiD for gauss points in standard
locations
in 2D quadrilateral elements ?
To give some background, I am using a program called NONSAP which
outputs gauss point stresses only for most of its material models. It
uses this convention for a 4 node element with node order I-J-K-L:
J I
•-----------•
| |
| 2 4 | 1,2,3,4 are the 2x2 gauss point locations
| |
| 1 3 |
| |
•-----------•
K L
The above produced strange results on GiD.
Using the order below seemed to produce better results visualising on
GiD for a test problem:
J I
•-----------•
| |
| 2 1 | 1,2,3,4 are the 2x2 gauss point locations
| |
| 3 4 |
| |
•-----------•
K L
So does GiD use this order, or is it something more complicated
altogether? Also how does GiD number the gauss points for a 3x3 scheme?
I can't find any info in the documentation on the number ordering issue.
Hopefully above diagrams are not messed up on transmission.
Regards
Dave Gardner
The Gauss Points order and local axis position for Triangle and
Quadrilaterals are given on the page 185 of the GiD Reference Manual. On
this page the order of a 3x3 scheme is also pictured. The file of the GiD
Reference Manual (HTML, PDF and PS version) can be dowloaded at
http://gid.cimne.upc.es/download/do05.html
Regards
Valdenir de Souza Junior
Centro de Mecânica Aplicada e Computacional - CEMACOM
Federal University of Rio Grande do Sul - UFRGS
Porto Alegre, Brazil
At 23:12 24/09/01 +0100, you wrote:
Hello,
What is the numbering order used by GiD for gauss points in standard
locations
in 2D quadrilateral elements ?
To give some background, I am using a program called NONSAP which
outputs gauss point stresses only for most of its material models. It
uses this convention for a 4 node element with node order I-J-K-L:
J I
•-----------•
| |
| 2 4 | 1,2,3,4 are the 2x2 gauss point locations
| |
| 1 3 |
| |
•-----------•
K L
The above produced strange results on GiD.
Using the order below seemed to produce better results visualising on
GiD for a test problem:
J I
•-----------•
| |
| 2 1 | 1,2,3,4 are the 2x2 gauss point locations
| |
| 3 4 |
| |
•-----------•
K L
So does GiD use this order, or is it something more complicated
altogether? Also how does GiD number the gauss points for a 3x3 scheme?
I can't find any info in the documentation on the number ordering issue.
Hopefully above diagrams are not messed up on transmission.
Regards
Dave Gardner