Determining the axisymmetric geometrically nonlinear thermoviscoelastoplastic state of laminated shells by the theory of deformation along paths of small curvature

A technique is developed for determining the thermoviscoelastoplastic geometrically nonlinear axisymmetric stress-strain state of laminar shells of revolution under loads that induce meridional stress and torsion. The technique is based on the hypotheses of rectilinear element for the whole stack of layers. The relations of the theory of deformations along paths of small curvature are used as equations of state. The solution is reduced to the numerical integration of a system of ordinary differential equations. The technique is tried out by a test example and illustrated by determining the geometrically nonlinear thermoviscoelastoplastic state of a corrugated shell.