Influence of the cooling behaviour on mechanical properties of carbon fibre-reinforced thermoplastic/metal laminates

Authors

  • Camilo Zopp Technische Universität Chemnitz
  • Daisy Nestler Department of Lightweight Structures and Polymer Technology, Technische Universität Chemnitz, Reichenhainer Straße 31/33, 09126 Chemnitz, Germany
  • Nadine Buschner Department of Lightweight Structures and Polymer Technology, Technische Universität Chemnitz, Reichenhainer Straße 31/33, 09126 Chemnitz, Germany
  • Carola Mende Department of Lightweight Structures and Polymer Technology, Technische Universität Chemnitz, Reichenhainer Straße 31/33, 09126 Chemnitz, Germany
  • Sven Mauersberger Department of Conveyer Technology and Polymers, Technische Universität Chemnitz, Reichenhainer Straße 70, 09126 Chemnitz, Germany
  • Jürgen Tröltzsch Department of Lightweight Structures and Polymer Technology, Technische Universität Chemnitz, Reichenhainer Straße 31/33, 09126 Chemnitz, Germany
  • Sebastian Nendel Cetex Institute of Textile- and Processing Machines non-profit GmbH, Altchemnitzer Straße 11, 09120 Chemnitz, Germany
  • Wolfgang Nendel Department of Lightweight Structures and Polymer Technology, Technische Universität Chemnitz, Reichenhainer Straße 31/33, 09126 Chemnitz, Germany
  • Lothar Kroll Department of Lightweight Structures and Polymer Technology, Technische Universität Chemnitz, Reichenhainer Straße 31/33, 09126 Chemnitz, Germany
  • Michael Gehde Department of Conveyer Technology and Polymers, Technische Universität Chemnitz, Reichenhainer Straße 70, 09126 Chemnitz, Germany

DOI:

https://doi.org/10.21935/tls.v1i2.81

Abstract

For several years, thermoplastic hybrid laminates form a new class in the field of material compounds. These laminates consist of fibre-reinforced plastic prepregs and metal layers in alternating order. Compared to conventional thermosetting multilayer composites, these laminates are suitable for large-scale production and can be manufactured with significantly reduced cycle times in the thermoforming process.  

In the framework of this contribution, the influence of the cooling rate of carbon fibre-reinforced thermoplastic composites and hybrid laminates was investigated with regard to crystallinity and the resulting mechanical properties. Polyamide 6 and thermoplastic polyurethane as matrix systems were examined, in particular.

Additionally, the differential scanning calorimetry was used in order to investigate the influence of the cooling rate on the crystallisation behaviour. It could be determined that the cooling rate has a limited influence on the crystallisation of polyamide 6 and this influences the mechanical properties. Furthermore, a reliance of process parameters on the characteristics profile of composite materials and material compounds with thermoplastic polyurethane could be identified. Depending on process conditions, tensile, bending, and interlaminar shear properties fluctuate up to 20 % in fibre-reinforced laminates and up to 32 % in hybrid laminates. Moderate to fast cooling rates result in optimum mechanical characteristics of tensile properties in fibre-plastic-compounds. Fast to very fast cooling rates are advisable for bending and interlaminar shear properties. Highest tensile and bending characteristics are achieved in hybrid laminates by using fast to very fast cooling rates, while interlaminar shear properties tend to be highest in slow to moderate cooling rates.

Downloads

Published

2018-02-15

Issue

Vol. 1 No. 2 (2017): Special Issue: 3rd International MERGE Technologies Conference (IMTC), 21st - 22nd September 2017, Chemnitz

Section

Articles

License

Authors who publish with Technologies for Lightweight Structures (TLS) agree to the following terms:

  1. The corresponding authors confirm with their imprimatur that the article’s publication in Technologies for Lightweight Structures and the copyright terms have been approved by all the other coauthors.

  2. Authors retain copyright and grant Technologies for Lightweight Structures the right of first publication.

  3. If the paper is accepted for publication the content is licenced under a Creative Commons Licence “Attribution 4.0 International (CC BY 4.0)”. This permits use, distribution, and reproduction in any medium, provided the original work is properly cited, and is otherwise in compliance with the licence. Alternative Creative Commons Licences may be assigned in duly justified cases after consultation with the publisher (mail to: tls-journal@tu-chemnitz.de).

  4. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., publish it in a book), with an acknowledgement of its initial publication in Technologies for Lightweight Structures.

  5. Authors are permitted and encouraged to post the peer-reviewed, pre-copyedited version (post-print) of their articles online (e.g., in institutional repositories or on their website) prior to and during the submission process as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access). If authors wish to republish an article, they are kindly asked to include the following acknowledgment as well as a link to the original source of publication in Technologies for Lightweight Structures to secure consistent citations:

    This is a peer-reviewed, pre-copyedited version of an article accepted for publication in the open access journal Technologies for Lightweight Structures (TLS). The original publication with full bibliographic citation is available online at: xxx [insert DOI received upon publication].

For further questions, feel free to contact us via e-mail.