2004-Fez conference on Differential Equations and Mechanics. Electronic Journal of Differential Equations, Conference 11, 2004, pp. 175-185. Title: Decay estimates for solutions of some systems for elasticity with nonlinear boundary feedback Author: Naji Yebari (Univ. Abdelmalek Essaadi, Tetouan, Maroc) Abstract: We study the energy decay rate for the Euler-Bernoulli and Kirchhoff plate equations. Under suitable growth assumptions on the nonlinear dissipative boundary feedback functions, we obtain some new results. Published October 15, 2004. Math Subject Classifications: 74KB05, 74K10, 74K20, 93D15. Key Words: Beams; linear elasticity; plates; stabilization of systems by feedback.