Hi Peter (@pborgens),
I’m confused about the results you shared in your previous post. Here are my observations:
- The pressing plate moves vertically a distance of 2 mm, but your plot shows a maximum travel of just over 2.5 mm.
- There is a 1 mm gap between the free end of the spring and the fixed sliding surface. From geometry, the pressing plate will move approximately 0.5 mm vertically before the free end of the spring engages with the fixed sliding surface. Your plot shows this engagement occurring at around 2 mm.
- Your spring rate (once engaged) is very high compared to the results obtained with no gap. I would not expect such a large change.
Maybe I have misunderstood your application. If so, please let me know.
I’m not sure what the friction coefficient for beryllium copper on steel is. As such I have run your simulation with three levels of friction. The results are shown in the plot below. This plot shows the sensitivity of the system to the level of friction.
Here is a link to my project.
The simulations to look at are:
- Spring13 - SO Gap - Run 1 - Coulomb 0.1
- Spring13 - SO Gap - Run 2 - Coulomb 0.2
- Spring13 - SO Gap - Run 3 - Coulomb 0.3
- Spring13 - SO Gap No Fric - Run 1 - PEN 1e13
These simulations take quite some time to solve (anywhere from 6 to 10 hours depending on the level of friction). However, I have found the current setup to be quite robust so I would stick with using a second order mesh with physical contacts.
I hope this helps.