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Auxiliary degrees of freedom

Thread starter joelrob
Start date Jul 25, 2001

Status: Not open for further replies.

Jul 25, 2001

joelrob

Civil/Environmental

Hi all,
I am examining a finite element program listing code (plane stress or strain analysis of solids), and I find a section where the programmer is talking about the 'elimintation of auxiliary degrees of freedom' when implementing the elementary matrices. Can anyone tell what this step
is for ? what do we mean by auxiliary dof's and why their elimination ? any references (books, articles) explaining that. This troubles me since this code gives results that are different form another code I wrote as well as two other cpmmercial FE codes in which I am more confident.

Thanks in advance.