Isolines of internal forces in circular spherical panels weakened by circular holes and subjected to nonlinear deformation and buckling

Chernik, 1964, Linear Theory of Shells, 282 Gotsulyak, 1978, A finite difference approach considering rigid-body displacements for solving problems on the theory of thin shells, 93 Savin, 1961 Aktas, 1970, Stress distribution around shell openings, J. Struct. Div., ASCE, 96, 2337, 10.1061/JSDEAG.0002746 Kubor, 1985, Nonlinear deformation and buckling of panels of non-canonical contour configurations, Thin-Walled Structures, 3, 181, 10.1016/0263-8231(85)90002-3 Kubor, 1983, Nonlinear deformation and buckling of shells weakened by holes of complex curvilinear configurations