@inproceedings{44326,
  abstract     = {{Low-quality models that miss relevant dynamics lead to major challenges in modelbased
state estimation. We address this issue by simultaneously estimating the system’s states
and its model inaccuracies by a square root unscented Kalman filter (SRUKF). Concretely,
we augment the state with the parameter vector of a linear combination containing suitable
functions that approximate the lacking dynamics. Presuming that only a few dynamical terms
are relevant, the parameter vector is claimed to be sparse. In Bayesian setting, properties like
sparsity are expressed by a prior distribution. One common choice for sparsity is a Laplace
distribution. However, due to disadvantages of a Laplacian prior in regards to the SRUKF,
the regularized horseshoe distribution, a Gaussian that approximately features sparsity, is
applied instead. Results exhibit small estimation errors with model improvements detected by
an automated model reduction technique.}},
  author       = {{Götte, Ricarda-Samantha and Timmermann, Julia}},
  booktitle    = {{IFAC-PapersOnLine}},
  keywords     = {{joint estimation, unscented Kalman filter, sparsity, Laplacian prior, regularized horseshoe, principal component analysis}},
  location     = {{Yokohama, Japan}},
  number       = {{2}},
  pages        = {{869--874}},
  title        = {{{Approximating a Laplacian Prior for Joint State and Model Estimation within an UKF}}},
  volume       = {{56}},
  year         = {{2023}},
}

@inproceedings{48482,
  author       = {{Götte, Ricarda-Samantha and Klusmann, Jo Noel and Timmermann, Julia}},
  booktitle    = {{Proceedings - 33. Workshop Computational Intelligence: Berlin, 23.-24. November 2023}},
  location     = {{Berlin, Germany}},
  pages        = {{113--123}},
  title        = {{{Data-driven identification of disturbances using a sliding mode observer}}},
  doi          = {{10.5445/KSP/1000162754}},
  year         = {{2023}},
}

@inproceedings{48476,
  author       = {{Hesse, Michael and Timmermann, Julia and Trächtler, Ansgar}},
  booktitle    = {{2023 European Control Conference (ECC)}},
  publisher    = {{IEEE}},
  title        = {{{Hybrid Optimal Control for Dynamical Systems using Gaussian Process Regression and Unscented Transform<sup>*</sup>}}},
  doi          = {{10.23919/ecc57647.2023.10178368}},
  year         = {{2023}},
}

@article{50070,
  author       = {{Junker, Annika and Pape, Keno Egon Friedrich and Timmermann, Julia and Trächtler, Ansgar}},
  issn         = {{2405-8963}},
  journal      = {{IFAC-PapersOnLine}},
  keywords     = {{General Medicine}},
  number       = {{3}},
  pages        = {{625--630}},
  publisher    = {{Elsevier BV}},
  title        = {{{Adaptive Koopman-Based Models for Holistic Controller and Observer Design}}},
  doi          = {{10.1016/j.ifacol.2023.12.094}},
  volume       = {{56}},
  year         = {{2023}},
}

@inbook{58350,
  author       = {{Reschke, Gregor and Brosius, Alexander}},
  booktitle    = {{Lecture Notes in Production Engineering}},
  isbn         = {{9783031473937}},
  issn         = {{2194-0525}},
  publisher    = {{Springer Nature Switzerland}},
  title        = {{{Investigations on Continuous Transient Dynamic Analysis of Clinched Aluminum Sheets}}},
  doi          = {{10.1007/978-3-031-47394-4_8}},
  year         = {{2023}},
}

@inbook{52614,
  author       = {{Bielak, Christian Roman and Böhnke, Max and Bobbert, Mathias and Meschut, Gerson}},
  booktitle    = {{Lecture Notes in Mechanical Engineering}},
  isbn         = {{9783031413407}},
  issn         = {{2195-4356}},
  publisher    = {{Springer Nature Switzerland}},
  title        = {{{Numerical Investigation of the Coupled Friction Behavior in the Clinching Process Chain}}},
  doi          = {{10.1007/978-3-031-41341-4_15}},
  year         = {{2023}},
}

@inproceedings{52688,
  author       = {{Bähr, Philipp and Striewe, Marius and Meschut, Gerson and Sommer, Silke and Hein, David}},
  booktitle    = {{13. Kolloquium: Gemeinsame Forschung in der Mechanischen Fügetechnik}},
  title        = {{{Ersatzmodellentwicklung zur Berücksichtigung der lokalen Fügeelementkinematik in mechanisch gefügten Verbindungen für die Bauteilauslegung im stahlintensiven Karosseriebau}}},
  year         = {{2023}},
}

@article{46494,
  abstract     = {{To improve the mechanical performance and to address current shortcomings of adhesive bonds such as bond degradation due to aging, a pulsed laser surface pretreatment of the metal surfaces of aluminum AW 6082-T6 joints with epoxy adhesive E320 is investigated. The surface treatment of the specimens resulted in increased single-lap shear (SLS) strengths before and after hydrothermal aging in 80°C hot water compared to nonpretreated reference specimens. In order to reveal the correlations of laser parameters, resulting surface morphologies and the SLS strength, differently laser pretreated surfaces were characterized at the micro- and nanoscale using optical and scanning electron microscopies. The surface enlargement was quantified with a digital image analysis of cross-sections prepared from the joint interfaces. An analysis of variances (ANOVA) of the SLS results indicated that the laser parameters power and pulse frequency were most critical for obtaining high SLS strengths. Pretreated joint surfaces with a high micro- and nano-surface enlargement and deep solidification structures provide high SLS strengths of up to 50 MPa and almost negligible aging losses of merely 4%. Undercut structures on the pretreated surfaces were found to be beneficial for the mechanical and aging properties when only limited micro- and nanostructuring was applied.}},
  author       = {{Freund, Jonathan and Löbbecke, Miriam and Delp, Alexander and Walther, Frank and Wu, Shuang and Tröster, Thomas and Haubrich, Jan}},
  issn         = {{0021-8464}},
  journal      = {{The Journal of Adhesion}},
  keywords     = {{Materials Chemistry, Surfaces, Coatings and Films, Surfaces and Interfaces, Mechanics of Materials, General Chemistry}},
  pages        = {{1--31}},
  publisher    = {{Informa UK Limited}},
  title        = {{{Relationship between laser-generated micro- and nanostructures and the long-term stability of bonded epoxy-aluminum joints}}},
  doi          = {{10.1080/00218464.2023.2223475}},
  year         = {{2023}},
}

@article{55760,
  abstract     = {{The transferability of structure–property relationships for laser-pretreated metal adhesive joints to laser-pretreated metal–carbon-fiber-reinforced plastic (CFRP) bonds was investigated. Single-lap shear tests were performed on hybrid AW 6082-T6–CFRP specimens pretreated with the same pulsed laser surface parameter sets on the metal surface as previously tested, AW 6082-T6–E320 metal adhesive joints. The fracture surfaces were characterized to determine the type of failure and elucidate differences and commonalities in the link between surface structures and single-lap shear strengths. Digital image analyses of the hybrid specimens’ fractured surfaces were used to quantify remaining CFRP fragments on the metallic joint side. The results indicate that high surface enlargements and the presence of undercut structures lead to single-lap shear strengths exceeding 40 MPa and 35 MPa for unaged and aged hybrid specimens, respectively. Whereas for the metal–polymer joints, the trend from high strength to weakly bonded specimens is largely continuous with the degree of surface structuring, hybrid metal–CFRP joints exhibit a drastic drop in joint performance after aging if the laser-generated surface structures are less pronounced with low surface enlargements and crater depths. Surface features and hydrothermal aging determine whether the specimens fail cohesively or adhesively.</jats:p>}},
  author       = {{Freund, Jonathan and Lützenkirchen, Isabel and Löbbecke, Miriam and Delp, Alexander and Walther, Frank and Wu, Shuang and Tröster, Thomas and Haubrich, Jan}},
  issn         = {{2504-477X}},
  journal      = {{Journal of Composites Science}},
  number       = {{10}},
  publisher    = {{MDPI AG}},
  title        = {{{Transferability of the Structure–Property Relationships from Laser-Pretreated Metal–Polymer Joints to Aluminum–CFRP Hybrid Joints}}},
  doi          = {{10.3390/jcs7100427}},
  volume       = {{7}},
  year         = {{2023}},
}

@article{46495,
  abstract     = {{A parameter investigation for manufacturing a hybrid system through the prepreg pressing process was carried out within the scope of this work to achieve optimal adhesion properties. The hybrid specimen comprises an aluminium sheet of alloy EN AW 6082 in T6 condition and a thermoset Carbon Fibre Reinforced Plastics prepreg. The prepreg pressing process allows the curing reaction of epoxy resin and the joining process to occur simultaneously to avoid an additional bonding process step. The surface of the aluminium sheet was pretreated in advance using a pulsed Nd:YAG laser to enhance the bonding properties. In the first step, the shear edge tests investigated the adhesion properties achieved with different consolidation (temperature, time and pressure) and laser parameters. Then, 3-point bending tests were carried out to investigate the influence of the consolidation parameters on the mechanical properties of the Carbon Fibre Reinforced Plastics-laminate. In this way, the optimal parameter sets for manufacturing hybrid structures were determined.}},
  author       = {{Wu, Shuang and Delp, Alexander and Freund, Jonathan and Walther, Frank and Haubrich, Jan and Löbbecke, Miriam and Tröster, Thomas}},
  issn         = {{0021-8464}},
  journal      = {{The Journal of Adhesion}},
  keywords     = {{Materials Chemistry, Surfaces, Coatings and Films, Surfaces and Interfaces, Mechanics of Materials, General Chemistry}},
  pages        = {{1--29}},
  publisher    = {{Informa UK Limited}},
  title        = {{{Adhesion properties of the hybrid system made of laser-structured aluminium EN AW 6082 and CFRP by co-bonding-pressing process}}},
  doi          = {{10.1080/00218464.2023.2245758}},
  year         = {{2023}},
}

@inproceedings{48597,
  abstract     = {{This paper introduces an intrinsic manufacturing process of a hat profile made of laser-pretreated aluminium sheet of alloy EN AW-6082 in T6 condition and carbon fibre-reinforced plastic (CFRP) prepreg. The resin system used in combination with CFRP was epoxy resin (EP). Before manufacturing, the laser-pretreated aluminium sheet and CFRP prepreg were stacked to form a multi-layer composite, which was pressed simultaneously in one process step. The optimal CFRP layer structure was calculated in advance using the finite element method. During the forming process, the curing reaction and the joining of the aluminium sheet and CFRP prepreg will take place simultaneously. Thus, further joining techniques such as bonding and riveting could be saved, and a much more efficient process could be achieved. After manufacturing, shear-edge test was used to characterize the adhesion properties of the hybrid part.}},
  author       = {{Wu, Shuang and Freund, Jonathan and Delp, Alexander and Haubrich, Jan and Löbbecke, Miriam and Walther, Frank and Tröster, Thomas}},
  title        = {{{Intrinsic forming of hybrid parts made of laser-structured aluminium sheet and CFRP-Prepreg}}},
  year         = {{2023}},
}

@inbook{48583,
  author       = {{Süßmann, Johannes}},
  booktitle    = {{Beyond Binaries. Religious Diversity in Europe}},
  editor       = {{Ralston, Joshua and Stosch, Klaus von}},
  isbn         = {{978-3-506-79155-9}},
  pages        = {{19–30}},
  publisher    = {{Brill | Schöningh}},
  title        = {{{When Did Europe Become Identified With Christianity? The Revolutionary Origins of an All Too Common Slogan}}},
  doi          = {{10.30965/9783657791552_003}},
  volume       = {{37}},
  year         = {{2023}},
}

@inproceedings{49436,
  author       = {{Kaiser, Maximilian Alexander and Reitz, Alexander and Konrad, Stefan and Meyer, Thomas and Marten, Thorsten and Tröster, Thomas}},
  booktitle    = {{Workshop Warmblechumformung}},
  editor       = {{Merklein, Marion}},
  isbn         = {{978-3-00-077160-6}},
  keywords     = {{Presshärten, resistive Schnellerwärmung, Energieeffizienz}},
  location     = {{Fürth}},
  pages        = {{99--118}},
  publisher    = {{Lehrstuhl für Fertigungstechnologie}},
  title        = {{{Untersuchung energieeffizienter und serientauglicher Erwärmungsstrategien mittels resistiver Erwärmung für den Presshärteprozess}}},
  volume       = {{18}},
  year         = {{2023}},
}

@inbook{46560,
  author       = {{Vochatzer, Stefanie}},
  booktitle    = {{Creative Approaches to Climate and Peace Education. An Educationr’s Guide to Using Storytelling and Art}},
  editor       = {{Bentz , Julia }},
  pages        = {{48}},
  publisher    = {{Leibniz Insitute for Educational Media, Georg Eckert Institute}},
  title        = {{{Connection and Community}}},
  year         = {{2023}},
}

@inproceedings{51190,
  abstract     = {{<jats:p>Abstract. Force-displacement measurements and macrosections are commonly used methods to validate numerical models of clinching processes. However, these ex-situ methods often lead to springback of elastic deformations and crack-closing after unloading. In contrast, the in-situ computed tomography (CT) can provide three-dimensional images of the clinching point under loading conditions. So far, the quantity of elastic springback that causes measuring deviations between in- and ex-situ measurements is not determined. In this paper, a method is described to quantitatively compare the results of in-situ CT, ex-situ CT and CT scans of cut specimens, which are prepared for macrosectioning, among each other. The method is applied to a single-lap shear test of two clinched aluminum sheets. Here, the test is conducted to specific process steps, then the specimen is CT scanned in-situ (during loading) and ex-situ (after unloading). Subsequently, the specimens are cut for macrosectioning and CT scanned. Finally, the outer contours and the interfaces of cross section images are determined by digital image analysis and the deviations over the clinching point between ex- and in-situ methods are calculated. </jats:p>}},
  author       = {{Köhler, Daniel and Kupfer, Robert and Troschitz, Juliane and Gude, Maik}},
  booktitle    = {{Materials Research Proceedings}},
  issn         = {{2474-395X}},
  publisher    = {{Materials Research Forum LLC}},
  title        = {{{Comparison of ex- and in-situ investigations of clinched single-lap shear specimens}}},
  doi          = {{10.21741/9781644902417-20}},
  year         = {{2023}},
}

@inbook{51194,
  author       = {{Köhler, Daniel and Stephan, Richard and Kupfer, Robert and Troschitz, Juliane and Brosius, Alexander and Gude, Maik}},
  booktitle    = {{Lecture Notes in Production Engineering}},
  isbn         = {{9783031183171}},
  issn         = {{2194-0525}},
  publisher    = {{Springer International Publishing}},
  title        = {{{In-situ Computed Tomography and Transient Dynamic Analysis of a Single-Lap Shear Test with a Composite-Metal Clinch Point}}},
  doi          = {{10.1007/978-3-031-18318-8_28}},
  year         = {{2023}},
}

@inbook{48642,
  author       = {{Akbulut Irmak, Emine Fulya and Hanses, Hendrik and Horwath, Ilona and Tröster, Thomas}},
  booktitle    = {{Climate Protection, Resource Efficiency, and Sustainable Engineering}},
  editor       = {{Horwath, Ilona and Schweizer, Swetlana}},
  isbn         = {{9783837663778}},
  issn         = {{2703-1543}},
  publisher    = {{transcript Verlag}},
  title        = {{{Case Study III: Challenges of lightweight design, vehicles, and rescuers}}},
  doi          = {{10.14361/9783839463772-006}},
  year         = {{2023}},
}

@article{47536,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>Efforts to enhance sustainability in all areas of life are increasing worldwide. In the field of manufacturing technology, a wide variety of approaches are being used to improve both resource and energy efficiency. Efficiency as well as sustainability can be improved by creating a circular economy or through energy-efficient recycling processes. As part of the interdisciplinary research group "Light—Efficient—Mobile" investigations on the energy-efficient friction-induced recycling process have been carried out at the department of Forming and Machining Technology at Paderborn University. E.g. using the friction-induced recycling process, different formless solid aluminum materials can be direct recycled into semi-finished products in an energy-efficient manner. The results of investigations with regard to the influence of the geometrical shape and filling rate of the aluminum particles to be recycled as well as the rotational speed of the continuously rotating wheel are explained in this paper. In addition to the recycling of aluminum chips, aluminum particles like powders from the field of additive manufacturing are processed. Based on these results, the future potentials of solid-state recycling processes and their contribution to the circular economy are discussed. The main focus here is on future interdisciplinary research projects to achieve circularity in the manufacturing of user-individual semi-finished products as well as the possibility to selectively adjust the product properties with the continuous recycling process.</jats:p>}},
  author       = {{Borgert, Thomas and Milaege, Dennis and Schweizer, Swetlana and Homberg, Werner and Schaper, Mirko and Tröster, Thomas}},
  issn         = {{1960-6206}},
  journal      = {{International Journal of Material Forming}},
  keywords     = {{General Materials Science}},
  number       = {{6}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Potentials of a friction-induced recycling process to improve resource and energy efficiency in manufacturing technology}}},
  doi          = {{10.1007/s12289-023-01785-w}},
  volume       = {{16}},
  year         = {{2023}},
}

@article{46486,
  author       = {{Pfeifer, Florian and Knorr, Lukas and Schlosser, Florian and Marten, Thorsten and Tröster, Thomas}},
  issn         = {{1848-9257}},
  journal      = {{Journal of Sustainable Development of Energy, Water and Environment Systems}},
  keywords     = {{Energy Engineering and Power Technology, Water Science and Technology, Environmental Science (miscellaneous), Renewable Energy, Sustainability and the Environment}},
  number       = {{3}},
  pages        = {{1--20}},
  publisher    = {{SDEWES Centre}},
  title        = {{{Ecological and Economic Feasibility of Inductive Heating for Sustainable Press Hardening Processes}}},
  doi          = {{10.13044/j.sdewes.d11.0450}},
  volume       = {{11}},
  year         = {{2023}},
}

@inbook{34165,
  author       = {{Hanses, Hendrik and Akbulut Irmak, Emine Fulya and Horwath, Ilona and Tröster, Thomas}},
  booktitle    = {{ Climate Protection, Resource Efficiency, and Sustainable Engineering. Transdisciplinary Approaches to Design and Manufacturing Technology}},
  editor       = {{Horwath, Ilona and Schweizer, Swetlana}},
  isbn         = {{978-3-8376-6377-8}},
  publisher    = {{transcript Verlag}},
  title        = {{{Challenges of lightweight design, vehicles, and rescuers}}},
  year         = {{2023}},
}