No convergence in the second step
No convergence in the second step
(OP)
Hello,
I have a certain static loading on an object in the first step, and the abaqus direct solver converges in a single iteration. I have another step in which I propogate the same boundary conditions and the loads, but the solver does not converge. I am not sure why.
I am using the second step to model surface contact between a solid model and a surface, but I disabled the interaction to troubleshoot when I discovered that even having the exact same static load and boundary conditions do not work properly.
Is there anything I am missing about the second step?
thanks!
I have a certain static loading on an object in the first step, and the abaqus direct solver converges in a single iteration. I have another step in which I propogate the same boundary conditions and the loads, but the solver does not converge. I am not sure why.
I am using the second step to model surface contact between a solid model and a surface, but I disabled the interaction to troubleshoot when I discovered that even having the exact same static load and boundary conditions do not work properly.
Is there anything I am missing about the second step?
thanks!





RE: No convergence in the second step
Rob Stupplebeen
https://sites.google.com/site/robertkstupplebeen/
RE: No convergence in the second step
http:
The pic on the left is the undeformed solid object. We apply cylidrically inward force (step 1) on the "legs," and we deform the object as shown in the top-right image. This object is inside a almost-cylidrical solid shell shown in the bottom-right image. The undeformed object protrudes out of the cylinder. When I let go off the forces (step 2), I want the legs to just touch the cylinder. Instead, the solver never converges even when I disable surface-to-surface interaction step. The solver doesn't converge for step 2 if I simply propogate the load and the boundary conditions from the initial step to step 1 and step 2.
I have the following boundary conditions propogated from the initial step:
a. three non-collinear point on the solid object are held stationary.
b. three non-collinear point on the cylindrical shell are held stationary.
The solid object is made of a superelastic material and the cylindrical shell is made of any metal.
RE: No convergence in the second step
Rob Stupplebeen
https://sites.google.com/site/robertkstupplebeen/
RE: No convergence in the second step