I am trying to perform an impact test on a bicycle frame (ISO 4210-6). I have the following problems:
1. Forcing a load doesn't seem to make sense, since the maximum load might occur before the impact energy is absorbed. Therefore, I think I need to simulate a displacement. My end goal is to simulate this in a non-linear study, but to start I just want to set the model up to simulate a fixed displacement well below the yield strength. The technique that I am using gives two different stresses though even when the load is set up to produce the same displacement:
Using a fixed load:
Using a fixed displacement:
275N load on left most surface 2.1mm displacement 3.1E7 N/m^2 0.25J Total strain energy
2mm displacement, left-most surface 2.1mm displacement 3.2E8 N/m^2 0.29J Total strain Energy
So, not a good match. I have never done a fixed displacement set-up before, so very possible I'm doing something silly.
2. The color gradient does not work on the fixed displacement.
The assembly file (2015) is attached, but I had to strip the results out to be able to post this at a reasonable size. Please note that the original frame has been replaced by a very, very simplistic entity just for the sake of portability and so that confidentiality is not breached.
Any observations would be appreciated.