Abstract: The aim of this work is to investigate and present a theoretical method to describe the anisotropic material properties of short glass fibre reinforced thermoplastics. In this work, the injection moulding process simulation in SIGMASOFT is combined with ABAQUS by a JAVA interface suggested, aiding a micromechanical model, in order to simulate a steady state response of short glass fibre reinforced thermoplastics under the application of a harmonic force.