Interfacial adhesion and failure transition governed by fibre embedded length in 3D-printed continuous carbon fibre–reinforced PETG composites

Siddharth Kumar, Min H. Htike, Jouni Partanen, José Humberto S. Almeida, Department of Energy and Mechanical Engineering, Aalto University, Department of Mechanical Engineering, LUT University

Journal of Thermoplastic Composite Materials

Published online on December 22, 2025

Abstract

Journal of Thermoplastic Composite Materials, Volume 39, Issue 7, Page 3660-3685, July 2026.
The mechanical performance of additively manufactured composites is strongly governed by fibre–matrix interfacial adhesion, which can be compromised by process-induced imperfections. This study examines how fibre embedded length controls interfacial ...