Displacement increment for contact is too big
Displacement increment for contact is too big
(OP)
Hi all,
I am running a static general step, with general contact defined & frictionless intprop.
I have a initial inc size of 0.001 and min of 1e-08 with max number of incs set to 1000.
The model is a tube deflecting off a bend in a larger tube, and as they come into contact, Abaqus cannot go any further as the contact seems to be creating a problem. I have tried reducing the increment size etc.. and played with the meshes, but with no luck.
I have this running fine in a dyn explicit step analysis. Was curious as to how it would run in a static step. Perhaps this is an inappropriate step type to use? I am not sure as I am relatively new to the software.
Any guidance at all would be great, as information online pertaining to the error is not helping. My input is attached.
Thank you all :)
I am running a static general step, with general contact defined & frictionless intprop.
I have a initial inc size of 0.001 and min of 1e-08 with max number of incs set to 1000.
The model is a tube deflecting off a bend in a larger tube, and as they come into contact, Abaqus cannot go any further as the contact seems to be creating a problem. I have tried reducing the increment size etc.. and played with the meshes, but with no luck.
I have this running fine in a dyn explicit step analysis. Was curious as to how it would run in a static step. Perhaps this is an inappropriate step type to use? I am not sure as I am relatively new to the software.
Any guidance at all would be great, as information online pertaining to the error is not helping. My input is attached.
Thank you all :)
Regards,
Tom





RE: Displacement increment for contact is too big
For A/Standard it is hard to have all the contact happening at one node. Add a fillet at the edge of rod and refine the mesh to get more nodes in contact. That might help. Also refine the tube to get a smoother contact surface inside.
The element type is also not good. A coarse mesh with C3D8R is likely to create trouble.
RE: Displacement increment for contact is too big