Abstract
Nonlinear buckling in thin-walled members is studied. The influence of arbitrary initial imperfections on the behaviour of the members can be taken into consideration. Based on the total Lagrangian description, a nonlinear spline finite strip method for problems of large elastic-plastic deflection is used. The displacement function of a strip is expressed as the product of transverse interpolation polynomials and longitudinal B3-spline. An arbitrary initial deformation is introduced to the analysis of the known shape of the structure. Arbitrary residual stress is treated as the stress field corresponding to the known initial state.
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