hybrid, layered, T-bars, structural weight, load limits, elastic and plastic materials, elastic limit, the maximum allowable strain, optimal design.

Formulated and solved the problem of optimal design of hybrid composite T-beam as required to achieve the maximum allowable elastic and plastic deformations. Considered layered composite structures. As a criterion for the equivalence of comparable projects and used the demand for equality of weights. As the maximum permissible operating conditions of elastic structures are considered stress levels amplitudes at which the limit of elasticity of the respective material is achieved for the first time. As the maximum allowable plastic deformation using the strain corresponding to the ultimate strength of the material. To solve the problem, a plastic model of a rigid-plastic body.

Nemirovsky Yuri Vladimirovich

e-mail: nemirov@itam.nsc.ru, Dr. Sci. Phys. & Math., Professor, Institute of Theoretical and Applied Mechanics S. A. Christianovich Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia.