incorrect computation of potential energy for frictional interactions
Bug #831910 reported by
Dion Weatherley
This bug affects 1 person
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| ESyS-Particle |
Fix Released
|
Medium
|
SteffenAbe | ||
Bug Description
Hi esys developers and users,
As I see the function getPotentialEnergy for the linear contact model, it only accounts for the normal potential energy. I'm thinking is there any tangential potential energy if the sliding does not occur (the tangential force is smaller than the threshold)? Since the tangential part is also considered as a spring with stiffness k_s, it will contain some potential energy, right? The energy is something like 0.5*f_s*f_s/k_s.
Best regards!
Ning
Related branches
| Changed in esys-particle: | |
| importance: | Undecided → Medium |
| Changed in esys-particle: | |
| assignee: | nobody → SteffenAbe (s-abe) |
| Changed in esys-particle: | |
| status: | New → Confirmed |
Revision history for this message
| SteffenAbe (s-abe) wrote | #1 |
| Changed in esys-particle: | |
| status: | Confirmed → Fix Committed |
| Changed in esys-particle: | |
| status: | Fix Committed → Fix Released |
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Added missing tangential part as Ning suggested. The current implementations is still only an approximation (using total current tangential force vs. incremental updates), but tests suggest an accuracy within a few percent (or better).
DOES NOT FIX WRONG POTENTIAL ENERGY IN CHertzianViscoE