Stress Field Gradient Analysis Technique Using Lower-Order Elements

Figure 4

Meshes of quadrilateral and triangular elements.

(a) Quadrilateral coarse mesh 400 elements: 441 nodes (Q4), 1281 nodes (Q8)

(b) Quadrilateral fine mesh 1600 elements: 1681 nodes (Q4), 4961 nodes (Q8)

(c) Quadrilateral double-fine mesh 6400 elements: 6561 nodes (Q4), 19521 nodes (Q8)

(d) Triangle coarse mesh 564 elements: 323 nodes (T3), 1209 nodes (T6)

(e) Triangle fine mesh 2220 elements: 1191 nodes (T3), 4601 nodes (T6)

(f) Triangle double-fine mesh 9040 elements: 4681 nodes (T3), 18401 nodes (T6)