Abstract
The buckling characteristics of PC/PET spherical–cylindrical combined pressure cabins under uniform external pressure were studied via experimental and numerical methods. The material properties of the PC/PET plastic alloy were tested. Six spherical–cylindrical combined pressure cabins with different structures were designed and fabricated, and the thickness and geometry of each model were measured. The hydrostatic pressure experiment was carried out on all the pressure cabins, and the ultimate load of the pressure cabin was recorded. Linear buckling analysis and nonlinear buckling analysis of PC/PET spherical–cylindrical combined pressure cabins were carried out, and the numerical and experimental results were found to be consistent. Moreover, the effects of the spherical shell radius and the thicknesses of different combinations on the buckling load were studied.
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