Referring to Wikiversity's tutorial "Introduction
to finite elements/Axial bar finite element solution" I'd like to know why, on
calculation of matrix Kij, the element K33 is equal to 1/h3 (and so, taking all
the elements equal to 1/h, K33=1) and afterwards, when the matrix Kij is written
in numeric form, K33=2. Really, taking K33=1 det(K)=0 and when K33=2 det(K)=1. I
think that the value of the the element K33 has been modified taking into
account boundary conditions. Otherwise?
Thanks for your answers.
Marco Siracusano