Transversal Vibrations Control and Load Bearing Capacity Enhancement of Beam System Using Smart Materials

K. Kuliński Division of Civil Engineering, Faculty of Civil Engineering, Czestochowa University of Technology, Akademicka 3 Street, 42-201 Czestochowa, Poland

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In the presented paper theoretical and numerical investigations of a coupled slender electro-mechanical system are demonstrated. The object of study comprises a core beam with both ends preventing natural longitudinal displacements and a ``smart'' piezoceramic material perfectly bonded to the beam's top and bottom surface. The problem is formulated upon Hamilton's principle, and the slenderness of the system classifies it into the Euler-Bernoulli beam theory. In order to study the system buckling behavior, the in-plane prescribed displacement of one of the supports is specified. Moreover, transversal vibrations related to the system's rectilinear shape are investigated. Depending on the actuator's poling direction, once the electric field is applied, based on its vector direction, it is possible to induce axial piezo force or force the system to bend. It is commonly used in precision engineering, especially in micropositioning, but also in shape and vibrations control and stability enhancement. In this work, the influence of the in-plane stress induction on system buckling behavior and transversal vibration control is studied in detail. Obtained numerical results show that the induced in-plane stress allows to control the system's vibrations in a significant manner. Moreover, by forcing the smart materials to induce the axial tensile force in the system, one may considerably increase buckling load.

DOI:10.12693/APhysPolA.142.77 topics: sandwich beam, buckling, dynamic response modification, piezoelectric actuation