Abstract
Resonant ultrasound spectroscopy (RUS) is widely used to evaluate the characteristics of small solid specimens like superconductor of a single crystal or anisotropic materials of fiber reinforced composites, for example. The elastic moduli of the solid body can be determined by measurement of the natural frequencies exited by a pair of Piezo-electronic transducer. In this paper, a numerical technique for the determination of the elastic constants in RUS testing is discussed. An alternative evaluation function for the search algorithm of the elastic moduli defined with determinant of the coefficient matrix is suggested here, and boundary element analysis is applied to calculate the eigen value of the 3 dimensional vibration on the solid body. Some numerical simulations for the Si single crystal are conducted to demonstrate the effectiveness of the present method.
