TY - GEN
T1 - Influence of infill structures and process parameters on the tensile strength of 3D-printed PEEK Parts
AU - Rehekampff, Christoph
AU - Schroeffer, Andreas
AU - Irlinger, Franz
AU - Lueth, Tim C.
N1 - Publisher Copyright:
© 2019 IEEE.
PY - 2019/12
Y1 - 2019/12
N2 - Polyetheretherketone (PEEK) is a high performance semi crystalline polymer used in technical applications as well as for medical purposes. Its mechanical properties and its temperature resistance often allow its use instead of metal for lightweight applications. In the medical field, its biocompatibility and the modulus of elasticity similar to this of bones make it a good choice for implants. For this purpose, additive manufacturing is a technology that allows the economic production of patient-specific implants. Until now, only few 3D- printers for PEEK are available on the market and only few process knowledge is available so far. In this paper, PEEK parts are fabricated using a 3D-printer based on the Fused Layer Manufacturing (FLM) technology. The influence of different process parameters on the mechanical properties of the specimens is investigated. For this, printing speed, local part cooling, filling degree and infill geometry are varied and the tensile strength of the corresponding specimens is investigated. Fracture surfaces are analyzed using optical microscopy and scanning electron microscopy. Results show a slightly increase of tensile strength at lower printing speed. Filling degree as expected has great influence on the mechanical properties. Optical investigation often shows insufficient adhesion between the single layers. Also a filament with carbon fiber reinforcement is used and compared to the standard material. This material shows a significant increase in tensile strength and stiffness.
AB - Polyetheretherketone (PEEK) is a high performance semi crystalline polymer used in technical applications as well as for medical purposes. Its mechanical properties and its temperature resistance often allow its use instead of metal for lightweight applications. In the medical field, its biocompatibility and the modulus of elasticity similar to this of bones make it a good choice for implants. For this purpose, additive manufacturing is a technology that allows the economic production of patient-specific implants. Until now, only few 3D- printers for PEEK are available on the market and only few process knowledge is available so far. In this paper, PEEK parts are fabricated using a 3D-printer based on the Fused Layer Manufacturing (FLM) technology. The influence of different process parameters on the mechanical properties of the specimens is investigated. For this, printing speed, local part cooling, filling degree and infill geometry are varied and the tensile strength of the corresponding specimens is investigated. Fracture surfaces are analyzed using optical microscopy and scanning electron microscopy. Results show a slightly increase of tensile strength at lower printing speed. Filling degree as expected has great influence on the mechanical properties. Optical investigation often shows insufficient adhesion between the single layers. Also a filament with carbon fiber reinforcement is used and compared to the standard material. This material shows a significant increase in tensile strength and stiffness.
KW - 3D-Printing
KW - Additive Manufacturing
KW - Fused Layer Manufacturing
KW - PEEK
UR - http://www.scopus.com/inward/record.url?scp=85079068923&partnerID=8YFLogxK
U2 - 10.1109/ROBIO49542.2019.8961457
DO - 10.1109/ROBIO49542.2019.8961457
M3 - Conference contribution
AN - SCOPUS:85079068923
T3 - IEEE International Conference on Robotics and Biomimetics, ROBIO 2019
SP - 1633
EP - 1638
BT - IEEE International Conference on Robotics and Biomimetics, ROBIO 2019
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2019 IEEE International Conference on Robotics and Biomimetics, ROBIO 2019
Y2 - 6 December 2019 through 8 December 2019
ER -