4

4.2 BEAM NO.2 WITH 2 NODES IN SPACE

Beam element with any symmetric profile (no slanting bend) with the restriction that the local y-y axis must be parallel to the global X-Y coordinate system. 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 as for the continuum elements.

Input:

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

Z88I1.TXT

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

> Set beam flag IBFLAG to 1

> 6 degrees of freedom in a node (Attention: DOF5 (not right hand rule), see below)

> Element type is 2

> 2 nodes per element

At the material information lines:

> Integration order INTORD is arbitrary (1..4), has no influence

> Cross-sectional area QPARA

> Second moment of inertia RIYY (bending around y-y axis)

> 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

> Second moment of area (torsion) RIT

> Second modulus (torsion) WT

Z88I3.TXT

Beams No.2 have no influence. However, Z88I3.TXT must exist (with any content).

Results:

Deflections in X, Y and Z and rotations around X, Y and Z. Attention DOF5 (not right hand rule), see below

Stresses: SIGXX, TAUXX: Direct stress, shear stress, SIGZZ1, SIGZZ2: Bending stress around z-z for node 1 and node 2, SIGYY1 SIGYY2: Bending stress around y-y for node 1 and node 2

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