Modeling of deformation process of multilayer glazing at nonstationary thermal and force loadings

Abstract

The research is devoted to modeling of multilayer airplane glazing deformation at nonstationary loadings. The purpose of this paper is development of the method for analysis of stresses and temperature fields in multilayer airplane glazing under different operation factors for glazing resource prolongation under extreme conditions. The method includes a technique for strength analysis of the multilayer airplane glazing under bird impact, and also a technique for investigation of temperature fields and thermal stresses in glazing at electrical heating. The model of multilayer glazing is based on the refined theory of the first-order accounting transverse shear strains, thickness reduction and normal element rotation inertia each layer. The mathematical model of pressure impulse authentically reproducing bird impact is based on the experimental researches. Electrical heating influence is modeled by a film heat source. The analytical solutions of problem about non-stationary vibrations of multilayer glazing under bird impact, thermal transfer and thermoelasticity problems are obtained by using the immersion method and are reduced to integration of systems of the integral-differential singular equations. Theoretical results are in good agreement with experimental data that allows recommending the method for working out new airplane glazing elements.