Rigid Body Rotation
Rigid Body Rotation
(OP)
Hello,
First of all i wanted to say that i already searched in the forum for similar problems, because of that i am creating this post.
I wanted to simulate a Rigid Body Rotation.
The point has the coordinates X,Y,Z 0,0,0 and is also the reference point of my analytic rigid body.
On this reference poinit i applied a Rotatary Boundary Condition of UR2: -3.14.
My Problem now is that the Rigid Body changes his scale in local Z-Direction during the Simulation.
I thought a rigid body is rigid and can not change his geometry.
I am using Abaqus Explicit and Dynamic Explicit Steps. I created a sketch in paint that maybe can help you.
Thank you for your help. If something is not clear please ask me.
Sincerly Rick
First of all i wanted to say that i already searched in the forum for similar problems, because of that i am creating this post.
I wanted to simulate a Rigid Body Rotation.
The point has the coordinates X,Y,Z 0,0,0 and is also the reference point of my analytic rigid body.
On this reference poinit i applied a Rotatary Boundary Condition of UR2: -3.14.
My Problem now is that the Rigid Body changes his scale in local Z-Direction during the Simulation.
I thought a rigid body is rigid and can not change his geometry.
I am using Abaqus Explicit and Dynamic Explicit Steps. I created a sketch in paint that maybe can help you.
Thank you for your help. If something is not clear please ask me.
Sincerly Rick





RE: Rigid Body Rotation
This is described in the manual.
RE: Rigid Body Rotation
Thank you very much for your quick answer. I did not know that analytic rigid surfaces extend to infinity. Now Abaqus displays me just my specified depth of extrude. But my Extrusion is in y-Axis Direction but as i said before my rigid part changes size in local z-Direction.
Before that i tried to solve this problem by defining a discret rigid part instead of a analytic rigid part and the result was the same.
Do you know how i can get a 3D rigid part with constant geometry dimensions? I know that i can create a solid 3d discret part and have to " Shell from Solid", but in my Simulations the geometry seems to change either.
Could that be some mass intertia problem? Or do i have to set the reference point in the sketch modul in the coordinate System origin?
Thank you for your help.
Sincerly Rick.
RE: Rigid Body Rotation
RE: Rigid Body Rotation
RE: Rigid Body Rotation
Thank you very much it was an ODB Display problem. The extrude depth was auto-computed, so my rigid surface changed his depth in every Frame/step in visuliation.
@SachinSA93
Do i need to define my Rigid Body in the Constraints again as an Analytical Rigid Surface and turn on "adjust point to centre of mass at the start of the analysis" ?
Because i have not assigned any mass or inertia to my rigid body.