Contact stiffness depends on both the material involved and the relative shapes and depth of engagement. There is no way to accurately calculate the stiffness of any given interaction using the assumptions used in Motion so the values provided are approximations only and the values calculated apply only to this shape/material/force. You must confirm the stiffness for your specific interactions manually.
Good day, thank you so much for your responses, I am sorry that I did not reply earlier, I didn't have notifications turned on. I am trying to find the stiffness of brass on brass with a cylinder on a plate. But the simulation keeps on failing saying that I am trying to get intermediate results on a non linear study, do you maybe know how I can fix this?
I am trying at the moment to press a disk into a plate but the simulation keeps on failing, is there a possibility that you know why this is. I cant upload pictures of my problem here.
It sounds like your Simulation study is failing, which could be caused by any number of issues but they are definitely going to be specific to your study setup. I would reach out to your VAR for support, if you are an MLC CAD Systems customer on subscription service you can email solidworkssupport@mlc-cad.com and someone from our team will reach out and assist!
Good day, This video has been extremely helpful. I would just like to know if there is any literature that supports this as I would like to reference this in a university project. I am also a little weary on the method that you used to calculate the damping as the default materials show a maximum of 0.8% of the stiffness. I am trying to find the values to simulated a brass piston coming into contact with a brass cylinder. I really hope that you can help me and thanks for the video!
Damping values can be extremely hard to calculate without real world data, the values used here were approximations based on the software vendor recommendations and your results or needs may vary. If your main concern is impact accuracy, use a drop test, Nonlinear or a Nonlinear dynamic FEA study. Motion Simulation's assumptions are simply too broad to give you accurate impact values and are only provided to allow you to simulate the motion of the system where impact is involved, not to give you high accuracy of the impact itself.
This definitely requires a skeptical approach to interpreting the results. Here is a video that explains an approach you can use to validate your results against real-world results. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-gy91iEBYXAo.html
It depends on what result you want. For example, if you have many different objects and all of them might interact with all of the others in the same way, such as rolling a large number of dice, you can select them all at once. If each contact set has a different stiffness or is unlikely to contact other components you will probably save solve time by defining them 1 at a time.
