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T-MAPPP – Simulation and experimental validation of high load compression of particle beds

Confined high-load compression of particle beds is applied in a wide range of fields. In most applications anisotropic characteristics of compacts regarding their mechanical strength, density distributions, porosity and others play important roles, determining the quality of the end product. Although high-load compaction has been around for a while (e.g. pharmaceutical tablets), for example, have been produced in large quantities since the 1870’s, there is a need for better understanding of the mechanistic principles that give rise to the different aspects of intra-compact inhomogeneities, which may very well be rooted in the evolution of events taking place during powder compression. The aim of this project is to investigate these phenomena and their evolution. Finite Element Method is often used to simulate confined compression of bulk powders but does not provide insight into the physics of the system at the particle level. We will establish a Distinct Element Method (DEM) formulation which will allow us to numerically reproduce both macroscopic characteristics of a compact as well as its internal micro-structure which can then be effectively studied.