I got the answer. The Coulomb law limits the total tangential force, which contains the damping term. [image: Screenshot 2022-06-14 135028.png]
On Monday, May 16, 2022 at 11:27:59 AM UTC-4 Qihan Xuan wrote: > Hi, > > I have a question about the tangential contact force in the below paper. > > Fleischmann, Jonathan. "DEM-PM contact model with multi-step tangential > contact displacement history." *Simulation-Based Engineering Laboratory, > University of Wisconsin-Madison, Technical Report No. TR-2015-06* (2015). > > Equation 1 shows that F_t has the damping term which is proportional to > the relative velocity.[image: t_F_1.png] > So, the larger V_t, the larger F_t. And there is no upper limit. > > However, Figure 1 shows that the F_ has an upper limit because of the > Coulomb friction.[image: t_F_2.png] > > My question is: > How does the damping term work when F_t reaches the Coulomb friction limit? > Is the damping term no longer proportional to relative velocity? > > Thanks, > Qihan > > > > > -- You received this message because you are subscribed to the Google Groups "ProjectChrono" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/projectchrono/d57dc683-8c20-4d25-9c09-c404e53ab696n%40googlegroups.com.
