Load-bearing capacity of rigid-plastic reinforced shallow shells and plates

Abstract

The extreme problem of finding upper (kinematic) limit load of rigid-plastic fiber-reinforced spherical shallow shells and plates, which are circular in plan, is formulated and solved. The structures are clamped and have rigid insert. Two-layer shell model is used. The materials of components are rigid-perfectly plastic and asymmetric in tension and compression. The binder is isotropic or orthotropic. The structural model of composition takes into account two-dimensional stress state in the components. The piecewise-linear yield curves are constructed for radial-circumferential and spiral reinforcement. Comparisons results with other studies are given and influence of reinforcement parameters on limit load is investigated.

Keywords:

• Shallow shells and plates
• fibrous reinforcement
• rigid-plastic model
• limit stress state
• load-bearing capacity
• piecewise-linear yield conditions
• material with asymmetry in tension and compression

Additional information

Funding

This work was supported by Ministry of Science and Higher Education of the Russian Federation under Project No. 121030900260-6. Федеральная целевая программа.