explosive loads, layered polymetallic beams, models of rigid-plastic materials, yield strengths, hardening moduli, ultimate loads, residual deflections.

We consider polymetallic beams of constant cross-section from sets of hardening and viscoplastic materials with their two-symmetric arrangement in the cross-section. The beams are considered to be subject to explosive loads. For all materials, a rigid-viscoplastic deformation model was used and the classical Kirchhoff deformation hypotheses were adopted. For bimetallic hingedsupported beams, general equations of deformation are obtained and a method for their solution is described. Residual forms of dynamic damage were determined.

Nemirovskii Yuri Vladimirovich, Dr. Sci. Phys. & Math., Professor, Leading Research Worker, S. Khristianovich Institute of Theoretical and Applied Mechanics of the Siberian Branch of the RAS, Novosibirsk, Russia, Novosibirsk Technical University, Novosibirsk, Russia.