Investigation of the energy characteristics of a layered beam-damper

Zhuk, Yaroslav A. and Senchenkov, Igor K. (2005) Investigation of the energy characteristics of a layered beam-damper. JOURNAL OF COMPUTATIONAL AND APPLIED MECHANICS, 6 (2). pp. 295-309. ISSN 1586-2070

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Abstract

Coupled thermomechanical behaviour of inhomogeneous viscoplastic structures under cyclic loading is investigated for the problem of harmonic bending and dissipative heating of a three-layered beam. Two problem statements are used. One is based on the generalized thermomechanically consistent flow theory (rigorous problem statement) and another one is the approximate scleronomic model implementation (approximate problem statement). Aluminium alloy and steel are chosen as the materials of layers. Two possible configurations of beam are studied. The first one is a composition with aluminium outer layers and a steel inner layer. The second one has the opposite combination of layers. A comparison of the results obtained for the rigorous and approximate problem statements is performed. The following quantities are compared: amplitudes of mechanical field characteristics, heating temperature and energies dissipated and stored in the material. A good agreement between the results is reached. A comparative estimation of beam loss coefficients for different configurations is also performed.

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