Stability Analysis of Columns with Surface Bonded Piezoelectric Layers Using Meshfree Method

فاقد چكيده فارسي

The main objective of this work is to extend the use of the Element-Free Galerkin (EFG) method for static buckling analysis of column with surface bonded piezoelectric layers. The piezoelectric layers are implemented in order to increase the buckling capacity of the column. The most significant advantageous of the meshfree method is that it requires only nodes, a description of internal and external boundaries of the model and also no element connectivity is needed. However, similar to any discretization method, acceptable solutions can only be obtained for a sufficiently refined discretization. The formulation is derived from the variational principle and solved numerically and the piezoelectric stiffness is taken into account in the model. A constant gain feedback control algorithm is used and increases Euler’s critical buckling load during piezoelectric actuation. The results obtained from the meshfree buckling analysis of an axial compressed simply supported, fixed-fixed and fixed-pinned columns show that active control can be used to stabilize compressive members against buckling, allowing them to be loaded well in excess of critical buckling load of bare coulmns.