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
marco.siracusano(a)fastwebnet.it