Numerische Simulation der Faserbewegung beim Strangpressen kurzfaserverstärkter Glasschmelzen

Abstract

Numerical Simulation of the Fibre-Motion during the Extrusion of Short-Fibre-Reinforced Glass-MeltsFibre-reinforced materials are characterized by an anisotropic behaviour of the mechanical properties. which is caused by the alignment of the embedded fibres. In the case of short-fibrecompounds this behaviour is strongly influenced by the mechanism of flow during the manufacturing process. Numerical simulation methods are prcfercntially used to get informations about the orientation of the reinforced fibres at the end of the moldingprocess and to improve the properties of the compound.For that, a model is developed, which calculates the motion of the short-fibres in the area of flow. basing on a three-dimensional finite-element-computation. Thereby the interaction between the particular fibres during the orientation process is considered by using an interaction coefficicnt.Examplificd at the extrusion of short fibre reinforced glassmelts, the fibre orientation is determined at models with different geometries of the pressing tool and variable boundary conditions. This procedure allows to determine the influence of the processparameters on the expected quality of the composite. The represented simulation-model can also be used for other molding-and extrusion-processes of fibre reinforced materials.

Mechanical properties of co‐extruded wear resistant powder metallurgical layers on steel substrates

“…According to the technical literature, increasing carbide content reduces the carbide alignment [13]. With increasing carbide density the hard particles affect each other, hindering them in moving unrestrictedly.…”