The Influence of Load Eccentricity on the Stability of a Two-Member Column with PZT Rod

J. Przybylski, K. Kuliński Częstochowa University of Technology, J.H. Dąbrowskiego 73, 42-201 Częstochowa, Poland

Full Text PDF

In this paper the stability of a cantilever two-member column made of an aluminum host rod and a discretely mounted piezoceramic rod is discussed. Both rods are connected to each other at the column's free end by an ideally rigid mounting head. Knowing that in practical engineering it is impossible to achieve an ideal axiality of the load application and that the assembling of structure components may lead to an unintended mounting inaccuracy, the presence of the unintentional eccentricity of the axial load is taken into considerations. To prevent prebuckling of the column, the piezo rod is proposed to be mounted discretely with an offset distance in regard of the host column. Next, the static deflection and the internal axial force distribution are determined to estimate how the electric field application modifies the static behavior of the system resulting originally from the external force loading. During numerical calculation, the offset distance and the eccentricity of the external load are taken as control parameters to prove that piezo actuation is efficient for suppressing column's deformation when the external eccentric load is relatively small. It is also shown that column deflection may be reduced, reverted and even its rectilinear shape may be recovered.

DOI:10.12693/APhysPolA.138.203 topics: stability, load eccentricity, offset distance, buckling envelopes, piezoelectric actuation