DETERMINATION OF THE COMPOSITE MATERIAL ELASTIC CONSTANTS BY HARMONICAL AND MODAL ANALYSIS
Arcady N. Soloviev, Igor V. Baranov
Pagini: 60-69
Publicat: 1 Jan 2007
Vizualizări: 100
Rezumat: The value of all composite elastic modules has the crucial influence on the aviation load-bearing structures dynamic behaviour. Numerous experimental techniques are used to characterize the elastic properties of polymeric composite materials. There are exist the large group of static tests, acoustic methods based on longitudinal, lateral or shear surface sound wavespeed measurements and also on vibrating surfaces amplitude measurements. However, a preparation of specimens for static test with shape required by standards not always possible from already manufactured piece. In this study an acoustic method is developed using the measure of all specimen’s eigenfrequencies in a certain frequency range. Small rectangular composite specimen is excited by bonded piezoelectric actuator and the frequency response is measured by piezoelectric sensor. Preliminary performed finite-element (FE) analyses serve to think the vibration natural modes of linked mechanical system - specimen and piezoelectric element. In this FE analysis used the rough estimations of all elastic constants obtained from other independents (as a rule static) experiments. Further the amelioration of initial elastic modules was performed. Thereby the target nonlinear functional dependent on all quest modules was minimized by genetic and (or) Levenberg-Marquardt algorithm.
Cuvinte cheie: polymeric composite, elastic module, acoustic measurements, eigenmodes, finite element method
Citează acest articol: Arcady N. Soloviev, Igor V. Baranov. DETERMINATION OF THE COMPOSITE MATERIAL ELASTIC CONSTANTS BY HARMONICAL AND MODAL ANALYSIS. Journal of International Scientific Publications: Materials, Methods & Technologies 1, 60-69 (2007). https://www.scientific-publications.net/en/article/1003541/
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