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Mechanical Characterisation of Bond Formation during Overprinting of PEEK Laminates

Hümbert, Simon and Atzler, Fynn and Voggenreiter, Heinz (2023) Mechanical Characterisation of Bond Formation during Overprinting of PEEK Laminates. Materials, 17 (1). Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/ma17010161. ISSN 1996-1944.

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Official URL: https://www.mdpi.com/1996-1944/17/1/161


The latest generation of high-temperature 3D printers enables the production of complex struc-tural components from aerospace-grade thermoplastics such as PEEK (polyether ether ketone). However, adding long or continuous fibres is currently limited, and thermal stresses introduced during the process restrict the maximum part dimensions. Combining 3D-printed components with continuous fibre-reinforced components into one hybrid structure has the potential to overcome such limitations. This work aims to determine whether in situ bonding between PEEK laminates and PEEK 3D printing during overprinting is feasible and which process parameters are significantly responsible for the bonding quality. To this end, the bonding is analysed ex-perimentally in two steps. Firstly, the influence of the process parameters on the thermal history and the strength of the bond is investigated. In the second step, a detailed investigation of the most critical parameters is carried out. The investigation showed the feasibility of overprinting with bonding strengths of up to 15 MPa. It was shown that the bonding strength depends pri-marily on the temperature in the interface. Additionally, the critical parameters to control the process were identified. The process influences that were displayed form the basis for future hy-brid component and process designs.

Item URL in elib:https://elib.dlr.de/201707/
Document Type:Article
Title:Mechanical Characterisation of Bond Formation during Overprinting of PEEK Laminates
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Hümbert, SimonUNSPECIFIEDhttps://orcid.org/0000-0003-1476-8427149818425
Atzler, FynnUNSPECIFIEDhttps://orcid.org/0009-0000-7234-3828149818428
Date:28 December 2023
Journal or Publication Title:Materials
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
Keywords:additive manufacturing; FDM; overprinting; PEEK; thermoplastic composites; in situ bonding; automated fibre placement
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Components and Systems
DLR - Research area:Aeronautics
DLR - Program:L CS - Components and Systems
DLR - Research theme (Project):L - Structural Materials and Design
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Design and Manufacture Technologies
Deposited By: Hümbert, Simon
Deposited On:03 Jan 2024 09:52
Last Modified:03 Jan 2024 13:16

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