Nonlinear Creep Buckling Analysis of Initially Imperfect Shallow Spherical Shells

摘要

Creep buckling times and creep deformations are obtained for axisymmetric shallow spherical shells with and without initial imperfections. For nonlinear creeps, both strain-hardening and time-hardening rules are employed in the analysis; results indicate that strain-hardening yields better estimates of shell life than time-hardening. Results also show that the initial imperfection plays an important role in shortening shell creep buckling times. (Author)