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Table 8 The limit load factor λ cr / m p for a clamped circular plate subjected to a linear load

From: Upper bound limit analysis of plates using a rotation-free isogeometric approach

a 2 Tresca(UB) Square(UB) Quadratic Cubic
−3 8.404 9.238 8.554 8.402
−2 6.412 6.928 6.639 6.485
−1 5.174 5.543 5.414 5.270
0 4.334 4.619 4.567 4.446
1 3.727 3.959 3.948 3.8926
2 3.269 3.464 3.475 3.363
3 2.911 3.080 3.074 3.000