Creep bending of thin-walled shells and plates by consideration of finite deflections

摘要

A phenomenological constitutive model for the characterization of creep-damage processes of metals is applied to the numerical analysis of thin-walled shells and plates. The governing equations of the theory of shallow shells are used taking into account geometrical nonlin- earities connected with finite time-dependent defections by moderate bending. The solutions of the initial-boun- dary value problem are obtained for thin rectangular plates in order to show the influence of geometrical non- linearity on results of time-dependent deformation and stress redistribution as well as on estimations of the failure time.