Determination of the anisotropic elasticity tensor by mechanical spectroscopy

Abstract A method is proposed to identify the fully anisotropic elasticity tensor by applying impulse excitation technique. specially designed batch of several differently oriented bar-shaped specimens with rectangular cross section analyzed respect eigenfrequencies their fundamental flexural and torsional modes. Estimations based on equations for calculation isotropic Young’s modulus shear from ASTM standard allow a first approximation selected subset measured eigenfrequencies. Subsequently, more precise determination achieved numerical modal analysis using finite element method. In this course, Newton–Raphson optimization applied solve inverse problem. The approach demonstrated specimen fabricated nickel-base alloy IN718 selective laser melting.