IDENT 1D—a novel software tool for an easy identification of material constitutive parameters Original Research Article

Non-linear finite element computations make use of very sophisticated constitutive equations for the description of materials behaviour. The first difficulty encountered by potential users is the gap existing between raw material characterisation on uniaxial specimens and the knowledge of the required equationʹs parameters. There are very few softwares for this particular task. IDENT 1D is a special software developed under Matlab language in our laboratory, which is able to provide a complete optimised parameters set for implemented models. The originality of IDENT 1D is that no initial estimation of the material parameters is requested of the user. Two main examples are described in this article: the creep law coupled with damage and a non unified cyclic law proposed by with a separation of plastic and viscous strain terms which is called DDI model. For both laws, the identification method is completely described. Each method is then applied to a set of experimental data. In both cases, the results of the parameters identification show a very good agreement with experimental data.