Question #679411 on Yade changed:
https://answers.launchpad.net/yade/+question/679411
Status: Open => Answered
Jan Stránský proposed the following answer:
Hi,
see [1]. The code says:
trsfNew = trsfOld + dt*velGrad*trsfOld
then (e.g.)
velGrad = (trsfNew-trsfOld)/dt * inv(trsfOld)
cheers
Jan
[1] https://gitlab.com/yade-dev/trunk/blob/master/core/Cell.cpp#L6
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