Speaker
Description
The integration of fibres into high performance concrete and polymer matrices is to improve the durability and structural integrity of materials. A critical factor in achieving optimal resistance is the precise alignment of the fibres within the rigid matrix. Particle Image Velocimetry (PIV) is used to determine velocity vector fields within a specially designed test rig.
This was created on the basis of a spherical probe rheometer, which is used in materials science for concretes to determine the flow properties [1]. In addition, fibre orientation measurements were taken throughout the container and processed using computer vision and artificial intelligence algorithms to produce a comprehensive orientation analysis.In this study, the decisive influence of flow properties on the movement of the fibres and the resulting orientation is investigated. The Jeffrey equation was crucial in this study as it allows the calculation of the angular acceleration of fibres depending on their prevailing orientation and flow conditions. This work represents a methodological approach that, through the synergistic use of PIV and orientation data, enables accurate analysis of fibre motion with the Jeffrey equation.
[1] Gerland, Florian, Tim Vaupel, Thomas Schomberg, und Olaf Wünsch. „Analysing the Influence of Fibers on Fresh Concrete Rheometry by the Use of Numerical Simulation“. Construction Materials 4, Nr. 1 (25. Januar 2024): 128–53.
https://doi.org/10.3390/constrmater4010008.
