Untitled

Abstract

See inside back cover or http://www.jomms.org for submission guidelines.Regular subscription rate: $500 a year. Subscriptions, requests for back issues, and changes of address should be sent to Mathematical Sciences Publishers, 798 Evans Hall, Department of Mathematics, University of California, Berkeley, CA 94720-3840. One of the current problems connected with multilayer composite structures concerns the analysis of the distribution of the stresses around peculiarities (free edge and loaded edge) and at the interfaces of each layer. This work presents a new shear stress function in the form of the exponential function to predict the mechanical behavior of multilayered laminated composite structures. As a case study, the mechanical behavior of a laminated composite beam (90The results are compared with the Touratier model sine and the two-dimensional finite element method studied. Results show that this new model is more precise than older ones when compared with results obtained by finite element analysis. To introduce continuity on the interfaces of each layer, the new exponential model is used with Ossadzow kinematics. The equilibrium equations and natural boundary conditions are derived from the principle of virtual power.

Stoney formula for piezoelectric film/elastic substrate system

“…[14][15][16][17] None of the above-discussed extensions of the Stoney method have relaxed Stoney's original assumption of spatial uniformity which does not allow film stress or curvature components to vary across the plate surface, and the Stoney formula has been extended to non-uniform misfit strain in thin film/substrate systems. [18,19] In addition, modified Stoney formulas have been derived in the presence of interfacial sliding. [20,21] A piezoelectric thin film deposited on an elastic substrate is bent, due to residual stress induced by mismatches between the film and substrate.…”