Repository navigation
[FEM] Account for rotation matrix derivatives in tangent stiffness for CorotationalFEMForceField - #6424
Open
th-skam wants to merge 27 commits into
Open
[FEM] Account for rotation matrix derivatives in tangent stiffness for CorotationalFEMForceField#6424th-skam wants to merge 27 commits into
th-skam wants to merge 27 commits into
Conversation
th-skam
added
pr: enhancement
th-skam
force-pushed
the
fix-corotational-tangent
branch
from
October 27, 2026 17:56
0e255d0 to
1aa6ff9
Compare
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
In
CorotationalFEMForceField, the current tangent stiffness does not include the derivatives of the estimated rotation matrix. So this PR adds them (only for thepolarmethod; the rest could follow in future PRs).Set to WIP because of pending PRs: #6423 to exclude the
addKToMatrixtest and #6421 for correct polar decomposition.I'll add the derivation in a separate doc. One example below:
[with-all-tests]