Determination of the elasto-plastic properties of aluminium using a mixed numerical-experimental method

摘要

A mixed numerical-experimental method is used to determine the parameters in elasto-plasticconstitutive models. Aluminium plates of non-standard geometry are mounted in a uniaxial tensile-testing machine. On the surfaces of the plates retro-reflective markers are placed. The displacementsof these markers are measured optically. These measurements are used to determine yield stresses inthe isotropic Von Mises and the orthotropic Hill yield criterion. The models are evaluated byexamining the estimated parameters and the residual displacements.