Hi guys!
I have a question for you.
When I see the result of my simulation, the graphic of the strain rate, has a lot of ascillations.
My question is: What do I have to do in order to avoid or reduce the oscillations?
I attached my graphic to clarify better.
Thanks in advance
Hi @marso1,
There are quite a few things at play with oscillations like this. Explicit vs Implicit, the type of element you are using, the element formulation, hourglass, and even the material itself can all impact this.
Sometimes there really isn't much to do if you aren't willing to change the fundamentals of your model. In this case, you can just apply a conservative filter and report the data as so.
Many thanks for your help.
My simulation is implicit at first, then it switches to explicit.
I am using quad element with 4 nodes (first order).
The bar is made of steel.
I tried to intensify the mesh through the bar using 1 layer = 10mm and then 5 mm, I had a reduction, but it is not enough.
I even tried with a layer of 1 mm but the result is not what I am looking for.
I am using Hypermesh with Ls dyna interface for the Pre-Processing and LS Dyna solutor for the processing, but unfortunately i don't know how to set a double precision.
Could you help me please?
Regards
My bad @marso1 for not responding immediately. Double precision is determined through a different ls-dyna solver file which has a "_d_" instead of "_s_".