@inproceedings{65208,
  author       = {{Rempel, Timm and Brüning, Florian}},
  booktitle    = {{ANTEC}},
  title        = {{{Investigations into the specific throughput stability of conical feed zones over the rotation speed during the direct processing of polypropylene regrind}}},
  year         = {{2025}},
}

@inproceedings{65209,
  author       = {{Held, Christian and Moritzer, Elmar}},
  booktitle    = {{FA11 – Kunststoff-Fügen}},
  title        = {{{Werkstoffgerechte Auslegung von Direktverschraubungen in SMC/BMC Bauteilen}}},
  year         = {{2025}},
}

@inproceedings{65210,
  author       = {{Held, Christian and Moritzer, Elmar}},
  booktitle    = {{FA11 – Kunststoff-Fügen}},
  title        = {{{Werkstoffgerechte Auslegung von Direktverschraubungen in SMC/BMC Bauteilen}}},
  year         = {{2025}},
}

@misc{63764,
  author       = {{Weiß, Deborah and Krome, Sven and Duffe, Tobias and Kullmer, Gunter and Ostwald, Richard}},
  publisher    = {{LibreCat University}},
  title        = {{{Experimentelle Ermittlung von Rissablenkungswinkeln bei außerphasiger Mixed-Mode-Belastung mittels einer neuartigen Probengeometrie}}},
  doi          = {{https://doi.org/10.48447/BR-2025-490}},
  year         = {{2025}},
}

@article{65004,
  author       = {{Knaup, Felix and Brüning, Florian}},
  journal      = {{Extrusion}},
  keywords     = {{Aufschmelzen, extrusion, Messtechnik}},
  pages        = {{28–33}},
  title        = {{{Vergleich experimenteller Methoden zur Untersuchung des Aufschmelzprozesses in Einschneckenextrudern}}},
  year         = {{2025}},
}

@inproceedings{61103,
  abstract     = {{Verification planning for engineering complex systems lacks a systematic procedure for creating test scenarios. Test scenarios can be generated by combining test cases, or by integrating test cases into pre-specified scenarios. Based on a systematic literature analysis a method is developed to simplify verification planning by creating new test scenarios and enriching existing ones. To assist the V&V engineer in planning test scenarios, a catalogue of combination premises is created to support the method. The method is evaluated in the development of a platform for emergency management. Evaluation proves that the method makes modelling of test scenarios more efficient.}},
  author       = {{Gräßler, Iris and Ebel, Marcel and Pottebaum, Jens}},
  booktitle    = {{Procedia CIRP}},
  issn         = {{2212-8271}},
  keywords     = {{Systems Engineering, test scenario creation, verification, customer involvement}},
  location     = {{Patras, Greece}},
  pages        = {{213--218}},
  publisher    = {{Elsevier BV}},
  title        = {{{Method for systematic creation of test scenarios for early customer involvement}}},
  doi          = {{https://doi.org/10.1016/j.procir.2025.08.038}},
  volume       = {{136}},
  year         = {{2025}},
}

@inproceedings{62149,
  abstract     = {{The increasing complexity of technical systems requires early, structured verification and validation (V&V). Existing metadata models only map parts of the engineering process and do not enable a continuous chain of effects from requirements to test results. The aim of this publication is to develop a holistic V&V metadata model for the consistent, transparent and machine-processable description and linking of relevant engineering artifacts. In a five-stage research approach, essential model components are derived from literature and are integrated into a holistic model. Initial applications as part of a European research project show the potential of the model for a well-founded effect chain analysis and decision-supporting V&V processes.}},
  author       = {{Gräßler, Iris and Ebel, Marcel}},
  booktitle    = {{DS 140: Proceedings of the 36th Symposium Design for X (DFX2025)}},
  keywords     = {{verification, metadata model, Systems Engineering}},
  location     = {{Hamburg}},
  publisher    = {{The Design Society}},
  title        = {{{Ganzheitliches Metadatenmodel für die Verifikation und Validierung in der Entwicklung komplexer technischer Systeme}}},
  doi          = {{10.35199/dfx2025.09}},
  year         = {{2025}},
}

@inproceedings{65231,
  author       = {{Charalampakis, Konstantinos and Safranoglou, Ioannis and Stavroulakis, Alexis and Ebel, Marcel and Gräßler, Iris and Dimelli, Despina and Mania, Katerina}},
  booktitle    = {{2025 IEEE International Symposium on Mixed and Augmented Reality Adjunct (ISMAR-Adjunct)}},
  publisher    = {{IEEE}},
  title        = {{{Augmented Reality for Navigation, Team Coordination, and Real-Time Data Visualization in Firefighting Operations}}},
  doi          = {{10.1109/ismar-adjunct68609.2025.00041}},
  year         = {{2025}},
}

@inproceedings{65213,
  author       = {{Petzke, Jonas Dirk Rudolf Helmut and Schöppner, Volker}},
  title        = {{{Thermo-Chemical Devulcanization of Sulfur-Cured Styrene-Butadiene Rubber (SBR) Using Diphenyldisulfide (DPDS)}}},
  year         = {{2025}},
}

@inproceedings{65204,
  author       = {{Moritzer, Elmar and Salm, Maximilian Karl Franz}},
  booktitle    = {{The 40th International Conference of Polymer Processing Society}},
  title        = {{{Influence of Filler Type and Volume Fraction on the Electrical Conductivity and Shore Hardness of TPU Composites in Fused Filament Fabrication}}},
  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}},
}

@inbook{65240,
  author       = {{Petzke, Jonas Dirk Rudolf Helmut and Schmidt, Leon and Kleinschmidt, Dennis and Brüning, Florian}},
  booktitle    = {{International Rubber Conference (IRC) 2025, Bangkok, BITEC; e-abstract book}},
  keywords     = {{distributives Mischen, Extrusion, Kautschuk, Stiftextruder}},
  pages        = {{150–151}},
  title        = {{{Experimental Analysis of the Mixing Behavior of Ethylene-Propylene-Diene Rubber (EPDM) in a Rubber Pin Extruder under Variation of Process Parameters and Mixing Elements}}},
  year         = {{2025}},
}

@inbook{65238,
  author       = {{Damanik, Hogenrich and Fatima, Arooj and Turek, Stefan and Petzke, Jonas Dirk Rudolf Helmut and Kleinschmidt, Dennis and Brüning, Florian}},
  booktitle    = {{International Rubber Conference (IRC) 2025, Bangkok, BITEC; e-abstract book}},
  keywords     = {{CFD simulation, Materialmodellierung, Phan-Thien-Tanner, PTT, Simulation}},
  pages        = {{266–268}},
  title        = {{{Numerical modeling of the non-isothermal viscoelastic flow behavior of rubber compounds based on the PHAN-THİEN-TANNER (PTT) model}}},
  year         = {{2025}},
}

@inbook{65239,
  author       = {{Petzke, Jonas Dirk Rudolf Helmut and Kleinschmidt, Dennis and Brüning, Florian}},
  booktitle    = {{International Rubber Conference (IRC) 2025, Bangkok, BITEC; e-abstract book}},
  keywords     = {{Devulkanisation, Kautschuk, Recycling}},
  pages        = {{185–186}},
  title        = {{{Thermo-Chemical Devulcanization of Sulfur-cured Styrene-Butadiene Rubber (SBR) Using Diphenyldisulfide (DPDS)}}},
  year         = {{2025}},
}

@article{65241,
  author       = {{Rempel, Timm and Brüning, Florian}},
  journal      = {{ANTEC}},
  title        = {{{Investigations into the specific throughput stability of conical feed zones over the rotation speed during the direct processing of polypropylene regrind}}},
  year         = {{2025}},
}

@inproceedings{65245,
  author       = {{Petzke, Jonas Dirk Rudolf Helmut}},
  title        = {{{Devulcanization behavior of SBR-based GTR compounds}}},
  year         = {{2025}},
}

@book{61118,
  abstract     = {{Im Zuge der Digitalisierung erfahren maschinelles Lernen und datengetriebene Methoden derzeit eine große Aufmerksamkeit in Wissenschaft und Industrie. Es fehlt jedoch an Grundlagenwissen und Verständnis, wie die datengetriebenen Methoden der Informatik mit bewährten modellbasierten Ingenieursmethoden wie dem modellbasierten Entwurf in der Mechatronik und Methoden der Regelungstechnik sinnvoll kombiniert werden können, um hybride Modelle zu erhalten. Diese ingenieurwissenschaftlichen Methoden basieren auf physikalischen Verhaltensmodellen, die eine besonders verdichtete und interpretierbare Darstellung von Wissen darstellen und insbesondere kausale Zusammenhänge beschreiben. Für spezifische regelungstechnische Anwendungen gibt es umfangreiches Vorwissen in Form von bekannten Strukturen und Informationen, wie z.B. (Teil-)Modelle oder Parametersätze, die auch bei der Anwendung von Methoden wie dem maschinellen Lernen genutzt werden sollten. Eine solche sinnvolle systematische Verknüpfung ist wissenschaftlich, insbesondere im Hinblick auf die industrielle Anwendung, noch nicht ausreichend untersucht worden und sehr vielversprechend. In diesem Beitrag werden die Ergebnisse der Nachwuchsforschungsgruppe DART – Datengetriebene Methoden in der Regelungstechnik vorgestellt. Das Hauptziel war es, die synergetische Kombination von modell- und datengetriebenen Methoden für regelungstechnische Aufgaben zu erforschen und es werden alle wichtigen Forschungsergebnisse aber auch die verwendeten Grundprinzipien des maschinellen Lernens in diesem Beitrag dargestellt.}},
  author       = {{Timmermann, Julia and Götte, Ricarda-Samantha and Junker, Annika and Hesse, Michael and Schwarzer, Luis}},
  publisher    = {{HNI Verlagsschriftenreihe}},
  title        = {{{DART - Datengetriebene Methoden in der Regelungstechnik}}},
  doi          = {{10.17619/UNIPB/1-2305}},
  volume       = {{Band 430}},
  year         = {{2025}},
}

@inproceedings{64803,
  abstract     = {{Nowadays ultrasound technology is established in various fields of application like industrial production or medical technology. Besides high power ultrasound applications like ultrasonic cleaning and ultrasonic welding, which are often not strongly restricted regarding their weight, costs, and construction space, there are many applications in the low to medium power range like handheld surgical instruments, medical inhalers, or ultrasonic cutters. For the latter there is often a strong demand for low weight and construction space and low costs to be competitive in mass production. Another challenge that arises from the RoHS-directive [1] is, that new ultrasonic devices should avoid the use of lead-containing PZT-materials. Against this background there is a demand for lead-free, small and lightweight and cost-effective ultrasonic transducers.
In many of the above-mentioned applications, pre-stressed Bolted-Langevine-Transducers (BLT) based on lead-containing PZT-materials are established to generate ultrasonic vibrations. These are quite advantageous in many ways and can be built tailored to each application and even for high power of thousands of watts. But due to the required steps during their manufacturing process (machining parts, assembly, pre-stressing, frequency tuning, …), these transducers remain expensive. Furthermore, due to the operation in resonance, the construction space of these transducers is linked to their wavelength and cannot be reduced remarkably.
For these reasons, our aim is to present an innovative lead-free ultrasonic transducer for low to medium power applications, that is based on bending vibrations instead of longitudinal vibrations. This design enables to build very small transducers. Furthermore, due to their simple construction, these transducers can be built at low manufacturing costs and are well suited for industrial mass production. The use of lead-free piezoelectric materials makes this transducer design ready for future applications.
In our contribution we will present the model-based design of a lead-free 30 kHz bending transducer for applications up to 10 W. Furthermore, the comprehensive experimental analysis of this transducer-prototype in applications like mist generation or ultrasonic drilling will be presented. The results will be compared to a PZT-based bending transducer and a classical BLT to show the potential and limits of these kind of transducers and lead-free materials.
}},
  author       = {{Bornmann, Peter and Littmann, Walter and Scheidemann, Claus and Hemsel, Tobias}},
  location     = {{Paderborn, Germany}},
  title        = {{{Innovative lead-free ultrasonic bending transducers for low to medium power applications}}},
  year         = {{2025}},
}

@inproceedings{64802,
  abstract     = {{Power ultrasonic actuators are used in various industrial, automotive and medical applications. Examples are ultrasonic welding of plastics or metal, surgery processes like cutting of tissue or bone, and the excitation of cavitation in liquids for ultrasonic cleaning. From a physical point of view, many of these processes are characterised by non-constant damping conditions for the ultrasonic actuators, since the systems need to be driven in unloaded as well as in high-loaded states. To get high power output, the piezoelectric actuators are usually driven in or near resonance at precisely defined vibration amplitudes. This is a quite complicated task  especially if cost or mass optimized PZT transducers are used or if lead-free piezoelectric ceramics are applied to replace lead-containing materials. In particular the sudden change between loading states is very challenging for electronic excitation and control. The present contribution gives insight into typical problems that may arise in context with sudden load-changes during operation, e.g. uncontrolled jumps in voltage and velocity amplitudes. Measurements on ultrasonic power actuators being abruptly immersed into water at high amplitude are discussed for illustration. Observations during spontaneous load-changes are explained, and it is shown that several problems may be defused by driving the actuators in antiresonance or using a particular driving point in-between resonance and antiresonance (“falling edge control”). The different control strategies are investigated always using just one single hardware.}},
  author       = {{Littmann, Walter and Bornmann, Peter and Hemsel, Tobias and Scheidemann, Claus}},
  location     = {{Paderborn, Germany}},
  title        = {{{Power ultrasonic actuators with suddenly changing loads: How to control the amplitudes in resonance,  antiresonance, or in-between}}},
  year         = {{2025}},
}

@misc{65221,
  author       = {{Kullmer, Gunter and Weiß, Deborah and Duffe, Tobias and Schramm, Britta and Ostwald, Richard}},
  publisher    = {{LibreCat University}},
  title        = {{{BESCHREIBUNG DES R- UND DES TEMPERATUREINFLUSSES SOWIE DES EINLAUFVERHALTENS BEI EXPERIMENTELL BESTIMMTEN RISSFORTSCHRITTSKURVEN MIT DEM EXPONENTIALANSATZ}}},
  doi          = {{https://doi.org/10.48447/BR-2025-492}},
  year         = {{2025}},
}