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Finite element modelling

The beam element connects 2 ou 3 nodes with 6 d.o.f each. With two nodes, the interpolation functions are linear whereas they are quadratic with three nodes. The traction/compression, shear forces, bending and torsion are taken into account.

The integration along the arc length is by the Gauss points method. As usual the beam element are under-integrated so as to get rid of the locking.