X-Y Graph Plots

The X-Y graph plot provides an x-y plot of various quantities of interest. The quantities are referred to the nodes. More than one node can be plotted and displayed simultan-eously. Depending on the type of plot, the x or y quantities may be sorted in ascending order.

Quantities which can be plotted in PISA:
The following quantities can be plotted on the x or y axis.

1. X displacement - Displacements in the x direction;
2. Y displacement - Displacements in the y direction;
3. X coordinate - X coordinate of the node;
4. Y coordinate - Y coordinate of the node;
5. Stress xx -;
6. Stress yy - ;
7. Stress xy - ;
8. Stress 1 - (compression is negative, is the algebraic larger stress quantity);
9. Stress 3 - (compression is negative, is the algebraic smaller stress quantity);
10. Max. Shear - is calculated from
11. Stress 1/Stress 3 -
12. P - mean stress.
13. q - shear stress. is the second stress invariants and
14. q/p - ratio of q/p as defined above;
15. Strain xx -;
16. Strain yy - ;
17. Strain xy - ;
18. Major Principle - (extension is positive);
19. Minor Principle -.