Post-buckling of a non-uniform ring subjected to uniform external pressure

摘要

Rigid plastic analysis is used to find the post-buckling response of a non-uniform circular ring subjected to uniform external pressure. The non-uniform ring has a section of reduced thickness over part of its circumference. A five plastic hinge model is used to described the non-axisymmetric post-buckling collapse. The principle of virtual work and upper bound the- orem are applied to find the collapse pressure and mode of collapse.