>> SHELL10/NL   SHELL10/NL (6/93) an FEM program written to perform a geometric-nonlinear static analysis of thin-shelled structures under the action of general force, thermal and residual-stress loading; the code uses an iterative Newton-Raphson procedure to solve nonlinear problem; it employs the core solver of SHELL10 for performing linearized analysis at each iteration and incorporates most of the specific features of its ancestor; schemes for automatic detection of nonlinear behavior of parts and a perturbation technique to capture bifurcation-buckling behavior with semi-automatic selection of perturbation force are incorporated; an under-relaxation technique is used to overcome convergence problems in the iterative solver; output of the code includes the final displacement of the part