Peculiarities of distribution of dynamic disturbances in composite rods

Abstract

The paper deals with longitudinal elastic-plastic impact on a two-layer composite rod with a fixed opposite end. The composite   rod consists of a soft layer (aluminum) and a hard layer (steel), with their position varying. The condition of the continuity of the particle velocity vector and the stress is met on the contact boundary of the rods. To describe the wave processes the grid-characteristic method is used which makes it possible to construct computational algorithms on the borders of the integration area and the interfaces correctly. The interaction of reflected and refracted stress waves at the interface of composite rods is analyzed.. The phenomena on the interface of composite rods are made more complicated by their interaction with the dynamics of changing both the applied external load and the stress waves reflected from the boundary surfaces. As a result of numerical studies we have shown the possibility of damages on the interface for an aluminum-steel composite rod and rapid decay of non-linear effects in the case of steel-aluminum. Positioning rods with specific mechanical characteristics in the order specified by the calculations, we found a possibility to control the level of dynamic loading of each individual element of the composite rod, and hence the operability of the whole composite rod.

About the authors

T. D. Karimbayev

Central Institute of Aviation Motors

Author for correspondence.
Email: karimbayev@ciam.ru

Doctor of Science (Engineering), Professor

Head of the Department of Composite Materials

Russian Federation

Sh. Mamayev

Moscow institute of Physics and Technology (State University)

Email: sch_mamaev@mail.ru

Candidate of Science (Engineering)

Research assistant of the Department of Computational Mathematics

Russian Federation

References

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