Mesh refining

1. From the SPC menu select Calculate a Section... command.

2. Type Poisson Coefficient, or click Enter to leave default value (0.00).

3. Select surface by clicking left mouse button.

Will open Polygon Mesh Detailed Options window:

4. Set appropriate parameters to refine surface mesh. Pay attention to Minimum initial grid quads parameter for fitting best results. This parameter represents the number of quadrangles per surface in the initial mesh grid. Bigger values result in slower meshing, more accurate meshes and a higher polygon count with more evenly distributed polygons. The suggested range is from 0 to 10000.

For others parameters explanations click on the window Help button. At first time, it's recommended to leave all parameters to default values.

5. Click Preview to show mesh and if you are satisfied by results click OK to confirm.

Properties calculation

In the main windows appear all result properties. They are differentiate by three sections:

• Statistic Data (Number of equations, number of triangles, etc.)
  
• Geometric and Inertial Data (Area, Mass Gravity Coordinates, Inertial Moments, etc.)
  
• Torsion and Shear Factors (Torsional factor, Shear factors, etc.)
  

Postprocessing

After calculus step it's possible to shown postprocessing diagrams.

Torsional Displacement

1. Click on Show check in Torsional Displacement frame, as sown below:

For best display you can disable mesh by select, from Rhino View menu, Rendered option. In this way you obtain a clear result as this:

Flow Lines

1. Click on Show check in Flow Lines frame: