Module 3: Introduction to Finite Element Method
  Lecture 19:
 

Since Eq. (19.7), (19.8) and (19.9) can be written as:

We get within the element (e)

(19.11)

where

Let


= Transpose of the matrix formed by cofactors of

 

cofactor

 

To be noted that the area of the triangle is given by

 

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