The thesis is entitled ”Mechanical Characterization of Heterogeneous Brittle Materials"
Opponent: Dr. Lars-Olof Nordin, Materiallaboratoriet LKAB, Luleå
Supervisor: Pär Jonsén
Assistant Supervisor: Jörgen Kajberg, Simon Larsson
Project: "GREENY", Grinding Energy Efficiency, upscaling project grant number 18009. KIC RawMaterials
One of the challenges when applying numerical analysis lies on the calibration of the models with mechanical parameters inherent to the constitutive laws and physics of the system especially for modelling industrial processes. Mineral material is exposed to a great variety of time-dependent forces within material fragmentation processes like crushing and grinding. A baseline to understand the interaction of the material with the machines is the analysis of fracture processes under different loading conditions. This thesis focuses on the mechanical characterization of manganese slag for the development, calibration and validation of constitutive models via direct and indirect measurements of the strength and fracture behaviour. A major conclusion is that mechanical behaviour and strength in dependent on the structure and composition of the material, inclusion density distribution and level of attachment to the matrix.