2.1.3. I-J-K Space

The first principal axis for each cell is relative to the direction of increasing I for that cell.

Figure 2.3: Material directions in I-J space

Material directions in I-J space

where,

(2–1)

Note:  When the I-J-K Space option is selected for 2D unstructured Lagrange elements, the direction of the first principal axis will coincide with the X-axis direction.