Modal interaction in composite cylinders under hydrostatic pressure
A procedure for the study of the overall and local instabilities in composite ring stiffness shells subjected to hydrostatic pressure is presented. The feature of the formulation is a combination of Koiter's amplitude modulation technique and the Byskov-Hutchinson asymptotic procedure for the interactive buckling analysis. A potential energy function is formulated in terms of a comparatively small number of degrees-of-freedom, viz. the degrees-of-freedom depicting the amplitude modulating function and a scaling factor of the overall buckling mode. Imperfection sensitivity under coincident buckling is examined, together with the optimality under interactive buckling with the total volume of the material kept constant and the critical stress ratio varied.
scientific article; zbMATH DE number 988951