The FEM-calculator of this page calculates support forces, truss forces and node displacements for 2D-truss structures.
Steps to set up a new model:
If all the bars have the same cross-section A and the same young modulus and you are not interested displacements, you can simply enter 1 for A and E.
- define the node points of the structure
- define each truss element by its 2 nodes and its material number
- define the material data (cross-section and young's modulus)
- define the loads
- define which node is supported in which direction
A and E have no influence on the bar forces in this situation.
The results are displayed:
Compression in red, tension in blue and zero force members in white.