Tied vs Partition inorder to have 2 layers connected
Tied vs Partition inorder to have 2 layers connected
(OP)
I am building a model where I have two layers of material. The outer layer is growing faster then the inner layer in my model. When I use partition to separate my two areas everything works great and I get the results I expect. However when I use the tie function, iterations or merged assembly I have not been able to get the results I expect like i am getting from partitioning my two layers apart. Does anybody know what setting I may be missing that would make these layers interact the same way they do when I partition them apart? The only reason this is a problem is that the next step is to apply this to a more complicated geometry and I will not be able to partition the sections apart in ABAQUS.
Thanks Campbell
Thanks Campbell





RE: Tied vs Partition inorder to have 2 layers connected
RE: Tied vs Partition inorder to have 2 layers connected
RE: Tied vs Partition inorder to have 2 layers connected
Thank you Campbell
P.S. A list of operations i have tried:
merge
tied constraints(default settings) :no contact properties, contact friction less and normal tangential, and rough
contact properties only: contact friction less and normal tangential, and rough
maybe missing some other setups i have run that i just can't think of at the moment
RE: Tied vs Partition inorder to have 2 layers connected
RE: Tied vs Partition inorder to have 2 layers connected
This is what I get when i partition the two layers out of a single object. This is the result i expect to get but am not
I don't understand what is going wrong. The most promise I have seen from any of these models is the rough contact with no separation set on the normal behavior but it still looked like my failed case where I had my outer layer forming spikes instead of buckling in on itself. I have found that the correct model takes much longer for Abaqus to process and it normally takes about 2 hours to run while all of the ones that form the spikes take about 10 minutes. With the tied condition I am having some of the surface move with the spikes that are forming but I it is still very far from being the bucking seen when using the partition method. I think the problem starts early in running the model analysis. When I use the partition method the model has uniform stress distribution all across the system however when I use any other method I do not have this uniform stress distribution instead the top of my model has lower stress. I expect that the problem I am getting is from this and the spikes reliving the built up stress instead of the system bucking very rapidly when a maximum stress is reached. Is there a setting in the tied condition that I am missing, I have tried both analytical default and surface to surface? or maybe a way to influence the mesh to help it have the uniform stress early on in the simulation?
RE: Tied vs Partition inorder to have 2 layers connected
RE: Tied vs Partition inorder to have 2 layers connected
https://drive.google.com/folderview?id=0B5Owd1gTUKIjM2NRYW0wWkZvbkU&usp=sharing
Thanks very much Campbell
RE: Tied vs Partition inorder to have 2 layers connected
Does anybody know if Density is treated differently when an object is partitioned vs tied?
I am wondering if for some reason it stops using a quasi-static analysis. Is that possible?
RE: Tied vs Partition inorder to have 2 layers connected
Thanks, Campbell