Widespread use of additive technologies, especially fused deposition modelling allows for the manufacture of complex thermoplastic parts, which are cheaper to produce than their metal equivalents. The downside of using thermoplastic materials is that they exhibit worse mechanical properties in comparison with other commonly used materials, such as aluminium or steel. With the goal of improving mechanical properties fillings in the form of short fibres are added, as well as long continuous fibres that can be deposited during printing. This master’s thesis presents the process of the optimization of an axial piston pump housing produced with the use of 3D printing technology by reinforcing it with long carbon fibres. The optimization process was done with the use of stress analyses, during which geometry, material and the long fibre reinforcements positions in the housing were changed. With proper positioning of carbon fibre reinforcements and adjusted geometry of the housing made from poly ether ether ketone with 30% short glass fibre reinforcements, the internal stress of the housing was reduced below yield stress of the material.
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