Index to Notes on Introductory FEA Theory
Example:
Eg. page 1
Eg. page 2
Eg. page 3
Eg. page 4
Constant Strain two dimensional continuum triangular element
Constant strain triangle, page 1
Constant strain triangle, page 2
Constant strain triangle, page 3
Constant strain triangle, page 4
Constant strain triangle, page 5
The problem of local and global co-ordinates does not arise in
continuum elements as as the x and y directions are chosen to coincide with
the global x and y directions.
The 'structural' stiffness matrix may be assembled from the element
matrices by noting that at each node the sum of the internal forces in x and in the y directions
must equal the externally applied forces in the x and in the y directions respectively.
David Grieve, 9th January 2006.