Additive manufacturing of PEEK-based continuous fiber reinforced thermoplastic composites with high mechanical properties

Vatandas B. B., UŞUN A., Yildiz N., Simsek C., CORA Ö. N., ASLAN M., ...More

COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING, vol.167, 2023 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 167
  • Publication Date: 2023
  • Doi Number: 10.1016/j.compositesa.2023.107434
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, PASCAL, Aerospace Database, Business Source Elite, Business Source Premier, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Keywords: A-Polymer-matrix composites (PMCs), B-Mechanical Properties, Continuous fiber-reinforced thermoplastic composites (CFRTP), E-3-D Printing
  • Karadeniz Technical University Affiliated: Yes


Continuous fiber-reinforced thermoplastic (CFRTP) printing is a promising method to increase the mechanical properties of FDM printed parts. In this study, it was aimed to achieve high mechanical properties using PEEK as a matrix and carbon fiber as support material. For this purpose, a novel production line was used to achieve CFRTP filaments with adjustable fiber volume fractions, and samples were additively manufactured. Further-more, an infrared heater was utilized to improve the interlaminar bonding of the printed samples. Although not affecting the tensile properties, usage of an infrared heater yielded a significant improvement in three-point bending tests due to shear forces. Furthermore, increasing the fiber volume fraction excessively showed a decrease in the flexural strength of the printed parts because of the insufficient wetting of the fibers and po-rosities occurring during the printing process. Lastly, failure surfaces of the printed parts and printed part cross-sections were examined.