Derivation and Validation of Linear Elastic Orthotropic Material Properties for Short Fibre Reinforced FLM Parts

Additively manufactured parts play an increasingly important role in structural applications. Fused Layer Modeling (FLM) has gained popularity due to its cost-efficiency and broad choice of materials, among them, short fibre reinforced filaments with high specific stiffness strength. To design functional FLM parts, adequate material models for simulations are crucial, as these allow reliable simulation within virtual product development. In this contribution, a new approach derive is presented; it based on simultaneous fitting the nine orthotropic constants linear elastic model using six specifically conceived tensile specimen geometries varying build direction different extrusion path patterns. The applied 15 wt.% carbon-fibre PETG filament own experiments, conducted Zwick HTM 5020 servo-hydraulic high-speed testing machine. For validation, displacement behavior geometrically more intricate demonstrator part, printed upright, under bending predicted compared experimental data. workflow proves stable calibration validation. Open research questions outlined.