CHARACTERIZATION OF MATERIAL PARAMETERS OF COMPOSITE PLATE SPECIMENS USING OPTIMIZATION AND EXPERIMENTAL VIBRATIONAL DATA

A numerical/experimental method for identification of material paramet ers of composite materials is proposed in this paper. This method comb ines experimental techniques for the determination of vibration eigenf requencies of plates made of composite materials along with a finite e lement numerical method for the determination of the corresponding num erical eigenfrequencies. The identification process makes use of optim ization techniques, through the minimization of an error measurement t hat estimates the deviation between numerical and experimental eigenva lues, for a given set of material parameters. The accuracy of the prop osed technique is discussed through test cases.