ABAQUS: Problem with generating nodes around the perimeter of a circle
ABAQUS: Problem with generating nodes around the perimeter of a circle
(OP)
Hello, everyone!
I am trying to create a FE model of composite plates that contain a circular delamination region. I don't work with CAE, but only with .INP files. However, I am stuck at the stage of modelling the circular delamination. More specifically, I am struggling with the process of arranging nodes around the circumference of a circle.
Here Link points 8, 9, 10 speak about components of a normal to the circular arc. I am aware of the fact that it is necessary to use the LINE=C parameter in order to arrange the nodes around the perimeter of the circle, but I have no idea about how I have to define these components of the normal to the circular arc. Is the normal represented by a simple node, for instance with Cartesian coordinates of 0,0,1 or...?
In the Abaqus Analysis User's Guide they say the following:
Any help will be really appreciated!
Thank you in advance for the time and co-operation!
I am trying to create a FE model of composite plates that contain a circular delamination region. I don't work with CAE, but only with .INP files. However, I am stuck at the stage of modelling the circular delamination. More specifically, I am struggling with the process of arranging nodes around the circumference of a circle.
Here Link points 8, 9, 10 speak about components of a normal to the circular arc. I am aware of the fact that it is necessary to use the LINE=C parameter in order to arrange the nodes around the perimeter of the circle, but I have no idea about how I have to define these components of the normal to the circular arc. Is the normal represented by a simple node, for instance with Cartesian coordinates of 0,0,1 or...?
In the Abaqus Analysis User's Guide they say the following:
Quote (An arc of a circle of 180° through 360° will require more extensive definition. For this case you must define the plane of the circular disc by giving the normal to the disc; the nodes will then be numbered according to the right-hand rule about this normal.)
Any help will be really appreciated!
Thank you in advance for the time and co-operation!





RE: ABAQUS: Problem with generating nodes around the perimeter of a circle
Really, hope that somebody can give his/her expertise regarding my Abaqus issue.
Thank you in advance!
RE: ABAQUS: Problem with generating nodes around the perimeter of a circle
To your question:
If your normal is the positive z direction, then dataline contents 8,9 and 10 would be:
0,0,1
Here is an example:
*node
100, 5,0,0
110, -5,0,0
99, 0,0,0
**
*ngen, line=c, nset=foo
100,110, ,99,,,,0,0,1
So I want to have a half circle on the xy-plane. Normal is z. With a normal in positive z direction the half circle will be on the upper half. With a negative z normal the half circle would be on the lower half.
RE: ABAQUS: Problem with generating nodes around the perimeter of a circle
Your help is much appreciated!!! I have managed to get the circle.
I am absolutely aware of the fact that I need the *NGEN, *NFILL and *ELGEN keywords, but I was not sure how the normal to the plane would be defined.
What do you mean by a preprocessor? I write my .INP files and then import them into Abaqus/CAE. If there is an error somewhere in the .INP file, the program displays a WARNING sentence and of course I do not see any elements/nodes (my model). So my preprocessor is Abaqus/CAE, right?
Many thanks again!