Identification of material properties using full-field and non contact measurements

in the present work, the digital image correlation (dic) measurement method is used to obtain the displacement field of specific regions of a cantilever beam under bending. these fields are used within an inverse analysis scheme in order to obtain the elasticity modulus of the beam material. the parameter estimation is performed by means of the minimization of an error function comprising of the difference between the displacement fields obtained from the experiment and from an appropriate mathematical model. the inverse problem is solved by means of the classical levenberg-marquardt nonlinear parameter estimation technique. the estimate obtained for the elasticity modulus is validated taking into account new experimental data obtained through modal analysis of another beam-like specimen which, in turn, is made of the same material as the original one.