====== TRUSS ======

===== Description =====

Plane truss bar. \\ \\ {{  :elements:truss.png?300|}}
The element is rectilinear between 2 nodes (I,J). These nodes define the local axis 1; local axis 2 forms an orthonormal basis with local axis 1 and the axis perpendicular to the TRUSS plane. \\ 
The TRUSS element can only be used with law [[laws:elatr|ELA-TR]].

Element type: 7 \\
Implemented by: I. Bertarini (1988)

==== Files ====
Prepro: TRUSSA.F \\
Lagamine: TRUSSB.F

===== Input file =====

^Title (A5)^^
|TITLE|"TRUSS" in columns 1 to 5|
^ Control data (3I5) ^^
|NELEM| Number of elements |
|NDISL|Number of groups of distributed loads to define|
|INSIG|0 if no initial stresses \\ 1 if initial stresses|
^Distributed loads - Only if NDISL ≠ 0 (2I5, G10.0)^^
|LCHAD| Number of the distributed load (from 1 to NDISL)|
|KODED| Index of direction of the distributed load: \\ = 1 load distributed along global axis x \\ = 2 load distributed along global axis y \\ = 3 load distributed along local axis 1 \\ = 4 load distributed along local axis 2|
|DISFO| Intensity of the distributed load|
^Initial stresses - Only if INSIG ≠ 0 (G10.0)^^
|SIGO|Initial stress $\sigma_0$ (along x axis)|
^Definition of the elements (I5, G10.0, I5/4I5) ^^
|LMATE| Material |
|NLOAD|Number of distributed loads applied|
|NODES(2)| List of nodes|
^Loads applied to the element - if NLOAD ≠ 0 (14I5)^^
|ICHAD(I) \\ I=1,NLOAD|Number of the distributed loads|
Note: The distributed loads stay constant, they are not multiplied by FMULT.
===== Results =====
The normal effort in the bar.