4

4.13 BEAM NO.13 WITH 2 NODES IN PLANE

Beam element with any symmetric profile. The profile values are provided in Z88I1.TXT. Thus, you can use any symmetric profile in contrast to other FEA programs which sometimes incorporate a variety of different special beam and profile subroutines without matching all symmetric profiles as necessary. The element matches exactly Bernoulli's bend theory and Hooke's law. It uses no approximate solution compared to the continuum elements.

Input:

CAD (see chapter 2.7.2): Line from node 1 to node 2

Z88I1.TXT

> KFLAG for cartesian (0) or polar coordinates (1)

> Set beam flag IBFLAG to 1

> 3 degrees of freedom in a node

> Element type is 13

> 2 nodes per element

At the material information lines:

> Any integration order INTORD (1...4), has no influence

> Cross-sectional area QPARA

> Insert 0 for second moment of inertia RIYY (bending around y-y axis)

> Insert 0 for max. distance EYY from neutral axis y-y

> Second moment of inertia RIZZ (bending around z-z axis)

> Max. distance EZZ from neutral axis z-z

> Insert 0 for second moment of area (torsion) RIT

> Insert 0 for second modulus (torsion) WT

Z88I3.TXT

Beams No.13 have no influence. However, Z88I3.TXT must exist (with any content).

Results:

Deflections in X and Y and rotations around Z.

Stresses: SIGXX, TAUXX: Direct stress, shear stress, SIGZZ1, SIGZZ2: Bending stress around z-z for node 1 and node 2

Nodal forces in X and Y and nodal moments around Z for each element and each node.