Update 23.06.2020

[thaletob]

While testing I recognized an error in Q4MembraneHelper -> GetAMatrix -> detJ is throwing an error because of an empty matrix J. I'm trying to fix it tomorrow.

[thaletob]

Your DKQElementHelper did not draw any errors while testing, so it should be okay! :)

[epsi1on]

I'll check your code ASAP

[thaletob]

The Error was actually caused by missing brackets in the allocation of Matrix J in my Q4MembraneHelper-class.

[thaletob]

Only one Error during the solving-process left. I have not implemented QuadBasicDrillingDof yet.

[epsi1on]

Actually the DKQ or Q4 do not carry torsional force (drilling dof), so an approx value is set for that on stiffness matrix.

[thaletob]

So you think this class is neccessary?

[epsi1on]

Yes, otherwise you’ll get Not Positive Definite exception

From: thaletob notifications@github.com Sent: Wednesday, June 24, 2020 12:16 PM To: BriefFiniteElementNet/BriefFiniteElement.Net BriefFiniteElement.Net@noreply.github.com Cc: epsi1on ehsan.ma@gmx.com; Comment comment@noreply.github.com Subject: Re: [BriefFiniteElementNet/BriefFiniteElement.Net] Update 23.06.2020 (#57)

So you think this class is neccessary?

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[thaletob]

Okay that is exactly what I've got in my last error. Thanks for the hint!

[thaletob]

I actually added the class which is nearly the same as TriangleBasicDrillingDofHelper.cs. But still getting the error you described.

[epsi1on]

OK, I'll check