elprinc2¶

Purpose:

Draw element principal stresses as arrows for two dimensional elements.

Syntax:

[sfac] = elprinc2(Ex, Ey, Es)
[sfac] = elprinc2(Ex, Ey, Es, plotpar)
elprinc2(Ex, Ey, Es, plotpar, sfac)

Description:

elprinc2 displays element principal stresses for a number of elements of the same type. The principal stresses are displayed as arrows at the element centroids. Note that only the principal stresses are displayed. To display the element mesh, use eldraw2.

Input variables are the coordinate matrices Ex and Ey, and the element stresses matrix Es defined in plants or planqs.

The variable plotpar sets plot parameters for the principal stress arrows:

plotpar\(= [\, arrowtype \;\; arrowcolor \,]\)

where

\(arrowtype\)		\(arrowcolor\)
1	solid line	1	black
2	dashed line	2	blue
3	dotted line	3	magenta
		4	red

Default, if plotpar is omitted, is solid black arrows.

The scale factor sfac is a scalar that values are multiplied with to get a suitable arrow size in relation to the element size. The scale factor is set automatically if it is omitted in the input list.

Limitations:

Supported elements are triangular 3 node and quadrilateral 4 node elements.