Abstract
The equations governing the elastic postbuckling response of flat and imperfect polar orthotropic circular and annular plates are presented. Their numerical solution using a finite-difference version of the DR algorithm is briefly described. A computer program based on DR is used to carry out parametric studies of the postbuckled response of clamped and simply supported plates subjected to uniform compression. Numerical results are presented for: three orthotropy ratios (e=1/3, 1 and 3), four imperfection amplitudes (μ = 0, 0.1, 0.5 and 1) and a wide range of hole-size ratios (β = 0 → 0.8).
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