INTRODUCING NONUNIFORMITY COEFFICIENTS IN THE STUDY OF VIBRATIONS OF MULTILAYER COMPOSITE BARS

Sabin RIZESCU, Alexandru BOLCU, Dumitru BOLCU, Marius Marinel STANESCU

Abstract


Sandwich composite bars are largely used in mechanical structures containing subparts made of composite materials. Due to fabrication issues, quite often, a large majority of sandwich bar exhibits a certain number of nonuniformities across its transversal section. Nonuniformities are to be assessed and quantified while building up mathematical model for the vibrations of such a bar. It was introduced three nonuniformity coefficients in writing the equations of motion for a vibrating multilayer sandwich bar. Only the case of a bar with geometric and mass symmetry was considered. Even though this case might be considered a very particular one, however the achievement here is that all considerations that have been made are in full respect with all requirements of PSDBT theory.


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References


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