From the same paper as the previous 4 images.
The references are:
Alves de Sousa, R.J., Cardoso, R.P., Fontes Valente, R.A., Yoon, J.W., Gracio, J.J. and Natal Jorge, R.M. (2006), “A new one-point quadrature enhanced assumed strain (EAS) solid-shell element with multiple integration points along thickness-Part II: Nonlinear applications”, Int. J. Numer. Meth. Eng., 67, 160-188
Sze, K.Y., Liu, X.H. and Lo, S.H. (2004), “Popular benchmark problems for geometric nonlinear analysis of shells”, Finite Elem. Anal. Des., 40, 1551-1569.
Eriksson, A., Pacoste, C. and Zdunek, A. (1999), “Numerical analysis of complex instability behaviour using incremental-iterative strategies”, Comput. Meth. Appl. Mech. Eng., 179, 265-305.
Kim, J.H. and Kim, Y.H. (2001), “A predictor-corrector method for structural nonlinear analysis”, Comput. Meth. Appl. Mech. Eng., 191, 959-974
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