Published online by Cambridge University Press: 10 February 2011
Theoretical and experimental investigations have been made to study the nonlinear static and dynamic behavior of composite Si02-Au microbridges. Measurements of maximal deflection amplitude were carried out on arrays of clamped-clamped SiO2-Au beams buckling under the effect of thin film effective residual stress. The static analysis adresses the issue of microfabricated beam buckling from an energy point of view. SiO2-Au and Au effective residual stresses are evaluated by considering the measured buckling maximal deflection and by through an adequate approximation of the shape of the microbeam deflection curve. The dynamic approach is based on a direct analytical model yielding an exact solution to the linear problem associated with the nonlinear vibrations of initially buckled clamped-clamped structures. Several experimental multi-mode dynamic responses of composite buckled beams are also given to illustrate the validity and accuracy of this analytical model.