Material model calibration by indentation, imprint mapping and inverse analysis

The identification of elastic-plastic material parameters by means of indentation tests and their finite element simulation is considered in this paper with the innovative provision of measuring the imprint geometry besides the indentation curves. The inverse analysis is carried out by a deterministic approach using conventional algorithms. The proposed methodology is validated using "pseudo-experimental" (computer generated) data with and without noise. Also friction between the indenter tool and the indented specimen is dealt with by inverse analysis and investigated through a parametric study. Sensitivity with respect to the sought parameters is examined for measurable quantities, including residual displacements on the specimen surface. (C) 2004 Elsevier Ltd. All rights reserved.