Coordinator: dr hab. inż. Łukasz Madej.
The project made a significant step in narrowing the gap between predictions of real porous material behaviour during plastic deformation and numerical approximation of its real behaviour. That was possible due to the use of recent developments in numerical modelling techniques. The project provided an experimental knowledge and advanced numerical model for fundamental investigation on influence of microstructure inhomogeneities of sintered porous materials on their behaviour under complex plastic deformation conditions. Particular emphasis was put on size, dispersion and shape of pores present in the material and their influence on inhomogenous material behaviour under complex loading paths during consolidation processes.
As a project outcome, besides an experimental knowledge also a complex computer system capable to numerically create reliable representation of 2D and 3D digital models of sintered microstructure was created. Additionally, system will provide a possibility to assign material properties and generate specific finite element meshes that are refined along the pores to capture strain inhomogeneities occurring in these locations. Finally, a complete digital material representation model replicating complex morphology of sintered porous microstructures was created for subsequent micro and multi scale analysis of material behaviour under various metal forming processing operations. Micro scale model provided also data for the homogenisation procedure - that way a macroscopic flow stress model can be provided to subsequent the macro scale analysis.
Obtained results and knowledge can be used for further application in modelling and computer simulation of plastic forming processes. The use of the preforms obtained by powder metallurgy methods allow for the reduction of waste and energy saving, which in turn will benefit the environment.
