Principe de la methode des champs virtuels avec champs speciaux

Abstract

Non-contact optical methods are now widely used in experimental mechanics. These methods provide full-field informations which are in fact new types of data because of the very important number of measurements. Such a new type of information must therefore be processed with suitable methods. The aim of this work is to examine the extraction of parameters which govern constitutive equations from these kinematical fields. The method proposed here is the virtual fields method. It is presently used with so called special virtual fields which feature interesting properties for identifying parameters. These parameters are for instance directly extracted, without any iterative calculations. The headlines of the method are presented in the first part of the paper. The accuracy and the stability of the method are then illustrated with some relevant examples.