From: Upper bound limit analysis of plates using a rotation-free isogeometric approach
i
P i,1
P i,2
P i,3
1
(0, 1)
(0, 2.5)
(0, 4)
2
(1, 1)
(1, 2.5)
(4, 4)
3
(2.5, 1)
4
(1, 0)
(2.5, 0)
(4, 0)