Consider the shallow shell panel, with all its four sides clamped, shown in Fig. 8.3.9. The geometric and material parameters are:
Use a uniformly distributed load, with a load step of ∆q0 = −0.02 psi (for a total of 20 load steps) and exploit the biaxial symmetry of the panel to determine the nonlinear response. Use various uniform meshes and full integration for all stiffness coefficients.
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