@article{65242,
  abstract     = {{<jats:title>Abstract</jats:title>
                  <jats:p>With the growing demand for lightweight solutions to reduce emissions, especially in the transportation, automotive and aerospace sectors, recyclable, continuous fiber-reinforced plastic composite laminates with a thermoplastic matrix are of rising interest. To achieve their maximum mechanical properties, the fiber-matrix adhesion (FMA) is critical. In this work, continuous fiber-reinforced thermoplastic laminates (CFRTPL) with a polypropylene (PP) matrix and twill woven glass fiber fabrics are produced by film stacking. The films used contain different amounts of maleic-anhydride-grafted PP (MA-g-PP) as a coupling agent to produce CFRTPL of different mechanical strengths. To analyze the FMA, the CFRTPL are subjected to Charpy-impact and tensile tests. Additionally, single fiber pull-out tests (SFPT) are conducted to further investigate the effect of MA-g-PP on the FMA. The results of the SFPT show an improvement in apparent interfacial shear strength (AIFSS) when the MA-g-PP content is increased, which can be attributed to an increase in FMA. However, the research shows that MA-g-PP has a low impact on the mechanical properties if the force is applied parallel to the warp and weft threads during tensile testing and the results of the Charpy-impact testing suffer from embrittlement of the matrix material. Subsequently, the results of this study are compared to three-point flexural tests conducted in a previous study. It can be concluded that tensile and impact tests are not suited to investigate FMA on a macroscopic scale, while SFPT and flexural tests provide a better alternative.</jats:p>}},
  author       = {{Moritzer, Elmar and Brandes, Philipp and Wittler, Maurice and Claes, Leander and Wippermann, Mareen and Haag, Markus and Gries, Thomas and Henning, Bernd}},
  issn         = {{0930-777X}},
  journal      = {{International Polymer Processing}},
  publisher    = {{Walter de Gruyter GmbH}},
  title        = {{{Fiber-matrix adhesion in glass fiber reinforced thermoplastic composite laminates and its effect on mechanical properties}}},
  doi          = {{10.1515/ipp-2025-0077}},
  year         = {{2026}},
}

@inproceedings{59683,
  abstract     = {{Woven fibre-reinforced polymers are used in a variety of application, especially where a low mass to stiffness ratio is required. Of paramount importance for the tailored mechanical properties these composite materials exhibit is the type and geometry of the fibre weave. Especially continuous fibre-reinforced thermoplastic composites are fabricated as laminates and subsequently exposed to forming processes which alter the geometry of the fibres unit cell and thus the local mechanical properties of the material. An approach utilising broadband ultrasonic waves is proposed to non-destructively determine the geometry of the unit cell of the weave.

The dispersive behaviour of woven fibre-reinforced sheets is described in accordance with the Flouquet-Bloch theorem as a phononic crystal. In order to develop a model for a description of these periodically structured waveguides, the smallest repeating unit of the wave is modelled with periodic boundary conditions. The resulting dispersion diagram exhibits similarities to that of a homogeneous plate, but additionally displays a periodicity in the wavenumber regime, which correspond with the size of the unit cell. Experimental studies of the dispersive behaviour of acoustic waves in woven fibre-reinforced samples also show a periodicity in the wavenumber regime, enabling a measurement procedure of the unit cell geometry.}},
  author       = {{Wippermann, Mareen and Claes, Leander and Brandes, Philipp and Moritzer, Elmar and Henning, Bernd}},
  location     = {{Copenhagen}},
  title        = {{{Determination of the unit cell geometry in fibre-reinforced polymer sheets using guided acoustic waves}}},
  doi          = {{10.71568/DASDAGA2025.116}},
  year         = {{2025}},
}

@article{63440,
  author       = {{Moritzer, Elmar and Brandes, Philipp and Westphal, Max Siegfried and Claes, Leander and Wippermann, Mareen and Düchting, Julia and Henning, Bernd}},
  journal      = {{WAK Jahresmagazin}},
  keywords     = {{Faser-Kunststoff-Verbunde (FKV), Faserverstärkte Kunststoffe (FVK), Organobleche, Ultraschall}},
  pages        = {{26–29}},
  title        = {{{ZERSTÖRUNGSFREIE ULTRASCHALLPRÜFUNG VON ORGANOBLECHEN}}},
  volume       = {{2025}},
  year         = {{2025}},
}

@inproceedings{62295,
  author       = {{Wippermann, Mareen and Claes, Leander}},
  booktitle    = {{2025 International Congress on Ultrasonics}},
  location     = {{Paderborn}},
  pages        = {{24----27}},
  publisher    = {{AMA Service GmbH}},
  title        = {{{Phononic crystallography of fibre-reinforced polymers using broadband acoustic waves}}},
  doi          = {{10.5162/ultrasonic2025/a1-b2}},
  year         = {{2025}},
}

@inproceedings{62294,
  author       = {{Zeipert, Henning and Nellius, Tom and Schönlau, Nikolas and Wippermann, Mareen and Claes, Leander and Nicolai, Marcel and Prager, Jens and Henning, Bernd}},
  booktitle    = {{2025 International Congress on Ultrasonics}},
  pages        = {{207----210}},
  publisher    = {{AMA Service GmbH}},
  title        = {{{Monitoring the curing process of adhesive bonds using selective excitation of guided ultrasonic waves}}},
  doi          = {{10.5162/ultrasonic2025/c6-a3}},
  year         = {{2025}},
}

@inproceedings{63441,
  author       = {{Moritzer, Elmar and Brandes, Philipp and Wittler, Maurice and Claes, Leander and Wippermann, Mareen and Henning, Bernd}},
  booktitle    = {{40th International Conference of the Polymer Processing Society}},
  keywords     = {{Faser-Kunststoff-Verbunde (FKV), Faserverstärkte Kunststoffe (FVK), Organobleche, Ultraschall}},
  title        = {{{Non-destructive fiber-matrix adhesion measurement of glass fiber reinforced thermoplastic composite laminates using ultrasound}}},
  year         = {{2025}},
}

@misc{55302,
  author       = {{Claes, Leander and Wippermann, Mareen}},
  title        = {{{Analysis of guided acoustic waves in periodically structured plates}}},
  year         = {{2024}},
}