Direct and inverse problems in metal forming of rigid-poroplastic materials

This work has been focused on a unified approach for parameter identification of rigid-poroplastic material model. A model of the P/M processing is described in which interaction between the parameters are considered. The direct problem for numerical solution has been described. In order to solve the associated inverse problem, a chosen functional is minimized by the use of gradient based methods and a sensitivity analysis. Several numerical and experimental results were presented. These are: the direct problem of simple compression of rigid-poroplastic material, re-identification of flow stress of matrix material and identification of loading functions for these materials. The concept proposed in this work is a flexible approach for identification of mentioned above poroplastic material model.