Two models based on the finite element method (FEM) are developed. These allow the prediction of the nonlinear stress strain and the failure behaviour of short fibre reinforced polymer composites (SFRCs) with a high degree of fibre orientation. Length, diameter and volume content of the fibres as well as the material properties of fibres and matrix may be chosen freely. It is further possible to model a material layer between fibres and matrix (interphase, interlayer) of arbitrary thickness and material properties. Such interphases are of interest since in many SFRCs they automatically develop during the manufacturing process or may be deliberately applied in order to improve composite properties.
