[Libmesh-users] A mistake in the miscellaneous example 12?

[Yuxiang W. <yw...@vi...>]

Dear all,

I seem to find a mistake in the implementation of the MITC4 shell
element, in the miscellaneous example 12.

In the reference used, "Modelisation des structures par elements finis,
Vol. 3: Coques.", on page 372 equation 6.3.90 it only added a small
drilling stiffness. This was done by a coefficient alpha that is
sufficiently small (1e-4 to 1e-7). However, in line 779
<https://github.com/libMesh/libmesh/blob/master/examples/miscellaneous/miscellaneous_ex12/miscellaneous_ex12.C#L779>of
the code (corresponding to this equation), this coefficient is dropped.

Could anyone please help discuss this issue?

Best,
Shawn
-- 
Yuxiang "Shawn" Wang, PhD
yw...@vi...
+1 (434) 284-0836