@inbook{34015,
author = {{Scharlau, Ingrid}},
booktitle = {{Reflexive Schreibwissenschaft}},
editor = {{Haacke-Werron, Stefanie and Karsten, Andrea and Scharlau, Ingrid}},
pages = {{147--152}},
publisher = {{WBV}},
title = {{{Hundertstelmillimeter}}},
doi = {{10.3278/9783763972524}},
volume = {{14}},
year = {{2022}},
}
@article{34253,
abstract = {{Lightweight construction has increasingly become the focus of scientific research in recent years, not least due to
the constantly increasing fuel price, which is a key factor in the economic viability of many companies. In this
respect, the use of hybrid structures, made of dissimilar materials offers many advantages. However, such hybrid
structures often have undesirable side effects. For example, brittle intermetallic phases are formed when
aluminum and steel are welded. Clinching as a mechanical joining process does not produce such intermetallic
phases since the connection is realized through form and force closure. In this process, a punch passes through
two or more sheets and forms them into a permanent joint in a die. In the present work, the corrosion phenomena
of an aluminum-steel clinched joint have been investigated by both experiments and numerical simulations in
order to explain the superior fatigue behavior of pre-corroded joints. Therefore, the clinched joints have been
corroded by a three-week salt-spray test. In addition, the electric potential and the von Mises stress are calculated
under the assumption of a static loading. The results of both experiments and numerical simulations can explain
the improvement in the fatigue behavior of the corroded specimens. This phenomenon can be attributed to the
accumulation of corrosion products in small gaps between the joined metal sheets.}},
author = {{Harzheim, Sven and Ewenz, Lars and Zimmermann, Martina and Wallmersperger, Thomas}},
issn = {{2666-3309}},
journal = {{Journal of Advanced Joining Processes}},
keywords = {{Mechanical Engineering, Mechanics of Materials, Engineering (miscellaneous), Chemical Engineering (miscellaneous)}},
publisher = {{Elsevier BV}},
title = {{{Corrosion Phenomena and Fatigue Behavior of Clinched Joints: Numerical and Experimental Investigations}}},
doi = {{10.1016/j.jajp.2022.100130}},
volume = {{6}},
year = {{2022}},
}
@article{34252,
abstract = {{Clinching is the manufacturing process of joining two or more metal sheets under high plastic deformation by form and force closure without thermal support and auxiliary parts. Clinch connections are applicable to difficult-to-join hybrid material combinations, such as steel and aluminum. Therefore, this technology is interesting for the application of AISI 304 components, as this material is widely used as a highly formable sheet material. A characteristic feature of AISI 304 is its metastability, i.e., the face-centered cubic (fcc) γ-austenite can transform into a significantly stronger body-centered cubic (bcc) α’-martensite under plastic deformation. This work investigates the effect of heat treatment—a process that involves the formation of an oxidation layer on the sheet surface—on the forming process during joining and the resulting mechanical properties of clinch joints made from AISI 304. For this purpose, different joints made from non-heat treated and heat-treated sheets were examined using classical metallography and advanced SEM techniques, accompanied by further investigations, such as hardness and feritscope measurements. The shear tensile strength was determined, and the fracture behavior of the samples was investigated. Clear influences of heat-treatment-induced surface roughness on the joint geometry and strength were observed.}},
author = {{Zeuner, André Till and Ewenz, Lars and Kalich, Jan and Schöne, Sebastian and Füssel, Uwe and Zimmermann, Martina}},
issn = {{2075-4701}},
journal = {{Metals}},
keywords = {{General Materials Science, Metals and Alloys}},
number = {{9}},
publisher = {{MDPI AG}},
title = {{{The Influence of Heat Treatment on the Microstructure, Surface Roughness and Shear Tensile Strength of AISI 304 Clinch Joints}}},
doi = {{10.3390/met12091514}},
volume = {{12}},
year = {{2022}},
}
@article{34249,
abstract = {{The trend towards lightweight design, driven by increasingly stringent emission targets, poses challenges to conventional joining processes due to the different mechanical properties of the joining partners used to manufacture multi-material systems. For this reason, new versatile joining processes are in demand for joining dissimilar materials. In this regard, pin joining with cold extruded pin structures is a relatively new, two-stage joining process for joining materials such as high-strength steel and aluminium as well as steel and fibre-reinforced plastic to multi-material systems, without the need for auxiliary elements. Due to the novelty of the process, there are currently only a few studies on the robustness of this joining process available. Thus, limited statements on the stability of the joining process considering uncertain process conditions, such as varying material properties or friction values, can be provided. Motivated by this, the presented work investigates the influence of different uncertain process parameters on the pin extrusion as well as on the joining process itself, carrying out a systematic robustness analysis. Therefore, the methodical approach covers the complete process chain of pin joining, including the load-bearing capacity of the joint by means of numerical simulation and data-driven methods. Thereby, a deeper understanding of the pin joining process is generated and the versatility of the novel joining process is increased. Additionally, the provision of manufacturing recommendations for the forming of pin joints leads to a significant decrease in the failure probability caused by ploughing or buckling effects.}},
author = {{Römisch, David and Zirngibl, Christoph and Schleich, Benjamin and Wartzack, Sandro and Merklein, Marion}},
issn = {{2504-4494}},
journal = {{Journal of Manufacturing and Materials Processing}},
keywords = {{Industrial and Manufacturing Engineering, Mechanical Engineering, Mechanics of Materials}},
number = {{5}},
publisher = {{MDPI AG}},
title = {{{Robustness Analysis of Pin Joining}}},
doi = {{10.3390/jmmp6050122}},
volume = {{6}},
year = {{2022}},
}
@article{34255,
abstract = {{Deformation of continuous fibre reinforced plastics during thermally-assisted forming or joining processes leads to a change of the initial material structure. The load behaviour of composite parts strongly depends on the resultant material structure. The prediction of this material structure is a challenging task and requires a deep knowledge of the material behaviour above melting temperature and the occurring complex forming phenomena. Through this knowledge, the optimisation of manufacturing parameters for a more efficient and reproducible process can be enabled and are in the focus of many investigations. In the present paper, a simplified pultrusion test rig is developed and presented to investigate the deformation behaviour of a thermoplastic semi-finished fiber product in a forming element. Therefore, different process parameters, like forming element temperature, pulling velocity as well as the forming element geometry, are varied. The deformation behaviour in the forming zone of the thermoplastic preimpregnated continuous glass fibre-reinforced material is investigated by computed tomography and the resultant pulling forces are measured. The results clearly show the correlation between the forming element temperature and the resulting forces due to a change in the viscosity of the thermoplastic matrix and the resulting fiber matrix interaction. In addition, the evaluation of the measurement data shows which forming forces are required to change the shape of the thermoplastic unidirectional material with a rectangular cross-section to a round one.}},
author = {{Borowski, Andreas and Gröger, Benjamin and Füßel, René and Gude, Maik}},
issn = {{2504-4494}},
journal = {{Journal of Manufacturing and Materials Processing}},
keywords = {{Industrial and Manufacturing Engineering, Mechanical Engineering, Mechanics of Materials}},
number = {{6}},
publisher = {{MDPI AG}},
title = {{{Characterisation of Fibre Bundle Deformation Behaviour—Test Rig, Results and Conclusions}}},
doi = {{10.3390/jmmp6060146}},
volume = {{6}},
year = {{2022}},
}
@article{34248,
abstract = {{Pin extrusion is a common process to realise pin structures in different geometrical dimensions for a subsequent joining operation. Nevertheless, the process of pin extrusion offers process limits regarding sheet thinning as a consequence of the punch penetration depth into the sheet. Thereby, cracks at the residual sheet thickness can occur during strength tests, resulting in a failure of the complete joint due to severe thinning. Therefore, measures have to be taken into account to reduce the thinning. One possibility is the application of orbital formed tailored blanks with a local material pre-distribution, which allows a higher sheet thickness in the desired area. Within this contribution, the novel approach of a process combination of orbital forming and pin extrusion is investigated. To reveal the potential of a local material pre-distribution, conventional specimens are compared with previously orbital formed components. Relevant parameters such as the residual sheet thickness, the pin height as well as the average hardness values are compared. The results show a significant positive influence of a local material pre-distribution on the residual sheet thickness as well as the resulting pin height. Furthermore, the strain hardening during orbital forming can be seen as an additional advantage. To conclude the results, the process limits of conventional pin extrusion can be expanded significantly by the application of specimens with a local material pre-distribution.}},
author = {{Römisch, David and Hetzel, Andreas and Wituschek, Simon and Lechner, Michael and Merklein, Marion}},
issn = {{2504-4494}},
journal = {{Journal of Manufacturing and Materials Processing}},
keywords = {{Industrial and Manufacturing Engineering, Mechanical Engineering, Mechanics of Materials}},
number = {{6}},
publisher = {{MDPI AG}},
title = {{{Pin Extrusion for Mechanical Joining from Orbital Formed Tailored Blanks with Local Material Pre-Distribution}}},
doi = {{10.3390/jmmp6060127}},
volume = {{6}},
year = {{2022}},
}
@article{34247,
abstract = {{The paper presents research regarding a thermally supported multi-material clinching process (hotclinching) for metal and thermoplastic composite (TPC) sheets: an experimental approach to investigate the flow pressing phenomena during joining. Therefore, an experimental setup is developed to compress the TPC-specimens in out-of-plane direction with different initial TPC thicknesses and varying temperature levels. The deformed specimens are analyzed with computed tomography to investigate the resultant inner material structure at different compaction levels. The results are compared in terms of force-compaction-curves and occurring phenomena during compaction. The change of the material structure is characterized by sliding phenomena and crack initiation and growth.}},
author = {{Gröger, Benjamin and Römisch, David and Kraus, Martin and Troschitz, Juliane and Füßel, René and Merklein, Marion and Gude, Maik}},
issn = {{2073-4360}},
journal = {{Polymers}},
keywords = {{Polymers and Plastics, General Chemistry}},
number = {{22}},
publisher = {{MDPI AG}},
title = {{{Warmforming Flow Pressing Characteristics of Continuous Fibre Reinforced Thermoplastic Composites}}},
doi = {{10.3390/polym14225039}},
volume = {{14}},
year = {{2022}},
}
@article{34256,
abstract = {{The 3D shear deformation and failure behaviour of a glass fibre reinforced polypropylene in a shear strain rate range of γ˙=2.2×10−4 to 3.4 1s is investigated. An Iosipescu testing setup on a servo-hydraulic high speed testing unit is used to experimentally characterise the in-plane and out-of-plane behaviour utilising three specimen configurations (12-, 13- and 31-direction). The experimental procedure as well as the testing results are presented and discussed. The measured shear stress–shear strain relations indicate a highly nonlinear behaviour and a distinct rate dependency. Two methods are investigated to derive according material characteristics: a classical engineering approach based on moduli and strengths and a data driven approach based on the curve progression. In all cases a Johnson–Cook based formulation is used to describe rate dependency. The analysis methodologies as well as the derived model parameters are described and discussed in detail. It is shown that a phenomenologically enhanced regression can be used to obtain material characteristics for a generalising constitutive model based on the data driven approach.}},
author = {{Gerritzen, Johannes and Hornig, Andreas and Gröger, Benjamin and Gude, Maik}},
issn = {{2504-477X}},
journal = {{Journal of Composites Science}},
keywords = {{Engineering (miscellaneous), Ceramics and Composites}},
number = {{10}},
publisher = {{MDPI AG}},
title = {{{A Data Driven Modelling Approach for the Strain Rate Dependent 3D Shear Deformation and Failure of Thermoplastic Fibre Reinforced Composites: Experimental Characterisation and Deriving Modelling Parameters}}},
doi = {{10.3390/jcs6100318}},
volume = {{6}},
year = {{2022}},
}
@article{34251,
abstract = {{Joining by forming operations presents powerful and complex joining techniques. Clinching is a well-known joining process for use in sheet metalworking. Currently, clinched joints are focusing on mechanically enhanced connections. Additionally, the demand for integrating electrical requirements to transmit electrical currents will be increased in the future. This integration is particularly important, for instance, in the e-mobility sector. It enables connecting battery cells with electrical joints of aluminum and copper. Systematic use of the process-specific advantages of this joining method opens up the possibility to find and create electrically optimized connections. The optimization for the transmission of electrical currents will be demonstrated for clinched joints by adapting the tool geometry and the clinched joint design. Based on a comparison of the electrical joint resistance, the limit use temperature is defined for the joining materials used based on the microstructural condition and the aging condition due to artificial aging. As a result of the investigations carried out, reliable current transmission at a constant conductor temperature of up to 120 °C can be achieved for clinched copper–copper joints. In the case of pure aluminum joints and mixed joints of aluminum and copper, long-term stable current transmission can be ensured up to a conductor temperature of 100 °C.}},
author = {{Kalich, Jan and Matzke, Marcus and Pfeiffer, Wolfgang and Schlegel, Stephan and Kornhuber, Ludwig and Füssel, Uwe}},
issn = {{2075-4701}},
journal = {{Metals}},
keywords = {{General Materials Science, Metals and Alloys}},
number = {{10}},
publisher = {{MDPI AG}},
title = {{{Long-Term Behavior of Clinched Electrical Contacts}}},
doi = {{10.3390/met12101651}},
volume = {{12}},
year = {{2022}},
}
@article{34254,
abstract = {{A virtual test setup for investigating single fibres in a transverse shear flow based on a parallel-plate rheometer is presented. The investigations are carried out to verify a numerical representation of the fluid–structure interaction (FSI), where Arbitrary Lagrangian–Eulerian (ALE) and computational fluid dynamics (CFD) methods are used and evaluated. Both are suitable to simulate flexible solid structures in a transverse shear flow. Comparative investigations with different model setups and increasing complexity are presented. It is shown, that the CFD method with an interface-based coupling approach is not capable of handling small fibre diameters in comparison to large fluid domains due to mesh dependencies at the interface definitions. The ALE method is more suited for this task since fibres are embedded without any mesh restrictions. Element types beam, solid, and discrete are considered for fibre modelling. It is shown that the beam formulation for ALE and 3D solid elements for the CFD method are the preferred options.}},
author = {{Gröger, Benjamin and Wang, Jingjing and Bätzel, Tim and Hornig, Andreas and Gude, Maik}},
issn = {{1996-1944}},
journal = {{Materials}},
keywords = {{General Materials Science}},
number = {{20}},
publisher = {{MDPI AG}},
title = {{{Modelling and Simulation Strategies for Fluid–Structure-Interactions of Highly Viscous Thermoplastic Melt and Single Fibres—A Numerical Study}}},
doi = {{10.3390/ma15207241}},
volume = {{15}},
year = {{2022}},
}
@inproceedings{34250,
abstract = {{As a joining-by-forming process, clinching and the use of functional elements enable low-energy joining of components through form, force, and, under certain conditions, material closure. In addition to the transmission of mechanical forces, these joining processes can be qualified for additional electrical contact within the scope of functional integration for electro-mobile applications. For this purpose, maximizing the force and material closure is necessary to ensure a long-term, stable transmission of electrical currents. To this end, the electrical properties of the joints were optimized. The investigations carried out show the long-term behavior under normal operating conditions and the short-circuit case.}},
author = {{Füssel, Uwe and Schlegel, Stephan and Reschke, Gregor and Kalich, Jan}},
booktitle = {{SFU/ICAFT 2022}},
publisher = {{MDPI}},
title = {{{Electrical Contacting of Aluminum Bus Bars Using Clinching and Functional Elements}}},
doi = {{10.3390/engproc2022026005}},
year = {{2022}},
}
@article{34414,
abstract = {{Given a steadily increasing demand on multi-material lightweight designs, fast and cost-efficient production technologies, such as the mechanical joining process clinching, are becoming more and more relevant for series production. Since the application of such joining techniques often base on the ability to reach similar or even better joint loading capacities compared to established joining processes (e.g., spot welding), few contributions investigated the systematic improvement of clinch joint characteristics. In this regard, the use of data-driven methods in combination with optimization algorithms showed already high potentials for the analysis of individual joints and the definition of optimal tool configurations. However, the often missing consideration of uncertainties, such as varying material properties, and the related calculation of their impact on clinch joint properties can lead to poor estimation results and thus to a decreased reliability of the entire joint connection. This can cause major challenges, especially for the design and dimensioning of safety-relevant components, such as in car bodies. Motivated by this, the presented contribution introduces a novel method for the robust estimation of clinch joint characteristics including uncertainties of varying and versatile process chains in mechanical joining. Therefore, the utilization of Gaussian process regression models is demonstrated and evaluated regarding the ability to achieve sufficient prediction qualities.}},
author = {{Zirngibl, Christoph and Schleich, Benjamin and Wartzack, Sandro}},
issn = {{0268-3768}},
journal = {{The International Journal of Advanced Manufacturing Technology}},
keywords = {{Industrial and Manufacturing Engineering, Computer Science Applications, Mechanical Engineering, Software, Control and Systems Engineering}},
publisher = {{Springer Science and Business Media LLC}},
title = {{{Robust estimation of clinch joint characteristics based on data-driven methods}}},
doi = {{10.1007/s00170-022-10441-7}},
year = {{2022}},
}
@article{34468,
abstract = {{Multiprofessionelle Kooperation zwischen allgemeinen und sonderpädagogischen Lehrkräften und mit weiteren Fachkräften, u.a. der Schulsozialarbeit, der Schulpsychologie und mit Schulbegleitungen, gilt bei der Entwicklung inklusiver Schulen als zentrale Stellschraube. Dementsprechend wird Kooperation im Kontext Schule auch in der universitären Ausbildung von zukünftig miteinander kooperierenden Professionen sowie in Fortbildungen für Lehrkräfte und multiprofessionelle Teams verstärkt ins Blickfeld gerückt. Zugleich lässt sich beobachten, dass in inklusiven Schulen bislang vermeintlich klare Zuständigkeiten, insbesondere zwischen Sonder- und Sozialpädagog*innen, aufweichen und neu austariert werden müssen. Bei der Entwicklung multiprofessioneller Teams gilt die Klärung von Rollen und Aufgaben als eine besondere Herausforderung, wenn unterschiedliche Professionen mit unterschiedlichen institutionellen Anbindungen und pädagogischen Zielperspektiven oder Grundhaltungen mitei-nander kooperieren. Das vorgestellte Instrument – der Rollenhut – dient dazu, in multiprofessionellen Gruppen eine individuelle Reflexion über die eigenen Aufgaben anzustoßen und auf dieser Grundlage gemeinsam über die gegenseitigen Erwartungen und Rollen zu diskutieren. Das Instrument wurde im Kontext von Fortbildungen multiprofessioneller Teams an Schulen konzipiert und auch im Rahmen der universitären Lehrer*innenbildung erprobt.}},
author = {{Neumann, Phillip and Hopmann, Benedikt and Lütje-Klose, Birgit}},
issn = {{2625-0675}},
journal = {{Herausforderung Lehrer*innenbildung - Zeitschrift zur Konzeption, Gestaltung und Diskussion}},
number = {{1}},
pages = {{13--25}},
title = {{{Der Rollenhut als Vermittlungsmedium - Rollenklärungsprozesse im Kontext multiprofessioneller Kooperationen als Thema universitärer Aus- und Fortbildungen von Lehrkräften und Sozialpädagog*innen}}},
doi = {{10.11576/HLZ-4949}},
volume = {{5}},
year = {{2022}},
}
@article{34461,
abstract = {{Teaching is a highly demanding profession that requires handling multiple and potentially contradictory goals. Therefore, it is likely that teachers experience conflict between work-related goals on a daily basis. Intraindividual goal conflict may occur when individuals pursue multiple goals drawing on the same limited resources (resource-based goal conflict), or when two or more goals are incompatible in terms of goal attainment strategy or desired end states (inherent goal conflict). Because goal conflict is typically associated with negative effects such as attenuated motivation and wellbeing, teacher goal conflict may jeopardize teaching motivation. This cross-sectional study investigated the effects of in-service teachers’ (N = 302) goal conflicts on their autonomous (intrinsic and identified regulation) and controlled (introjected and extrinsic regulation) teaching motivation and tested the satisfaction of teachers’ basic need for autonomy, competence, and relatedness as mediators. In line with our hypotheses, results from structural equation modeling showed that frequently experiencing resource-based goal conflict leads to a lower satisfaction of the basic need for autonomy, which, however, was unrelated to teaching motivation. In contrast, frequently experiencing inherent goal conflict attenuates the satisfaction of the basic need for competence, which, in turn, positively predicted autonomous teaching motivation and negatively predicted extrinsic regulation. As expected, relatedness was not associated with the experience of goal conflict. The discussion focuses on differential effects of the two types of goal conflict on teaching motivation and on the relevance to expand research on teachers’ intraindividual goal conflicts.}},
author = {{Gorges, Julia and Neumann, Phillip and Störtländer, Jan Christoph}},
issn = {{1664-1078}},
journal = {{Frontiers in Psychology}},
keywords = {{General Psychology}},
publisher = {{Frontiers Media SA}},
title = {{{Teachers Between a Rock and a Hard Place: Goal Conflicts Affect Teaching Motivation Mediated by Basic Need Satisfaction}}},
doi = {{10.3389/fpsyg.2022.876521}},
volume = {{13}},
year = {{2022}},
}
@techreport{34289,
author = {{Gorges, Julia and Neumann, Phillip and Wild, Elke and Lütje-Klose, Birgit and Grüter, Sandra and Weber, Antonia and Senior, Jonathan}},
pages = {{162}},
publisher = {{Univ. Bielefeld, Abteilung für Psychologie & Fakultät für Erziehungswissenschaft}},
title = {{{Bielefelder Fortbildungskonzept zur Kooperation in inklusiven Schulen (BiFoKi) : Technical Report V. 1.0}}},
doi = {{10.4119/unibi/2962493}},
year = {{2022}},
}
@inbook{33466,
abstract = {{We review our results of numerical simulations of light scattering from different systems of densely packed irregular particles. We consider spherical clusters, thick layers and monolayers with realistic topologies and dimensions much larger than the wavelength of light. The maximum bulk packing density of clusters is 0.5. A numerically exact solution of the electromagnetic problem is obtained using the Discontinuous Galerkin Time Domain method and with application of high- performance computing. We show that high packing density causes light localization in such structures which makes an impact on the opposition phenomena: backscattering intensity surge and negative linear polarization feature. Diffuse multiple scattering is significantly reduced in the case of non-absorbing particles and near-field interaction results in a percolation-like light transport determined by the topology of the medium. With this the negative polarization feature caused by single scattering gets enhanced if compared to lower density samples. We also confirm coherent double scattering mechanism of negative polarization for light scattered from dense absorbing slabs. In this case convergent result for the scattering angle polarization dependency at backscattering can be obtained for a layer of just a few tens of particles if they are larger than the wavelength.}},
author = {{Grynko, Yevgen and Shkuratov, Yuriy and Alhaddad, Samer and Förstner, Jens}},
booktitle = {{Springer Series in Light Scattering - Volume 8: Light Polarization and Multiple Scattering in Turbid Media}},
editor = {{Kokhanovsky, Alexander}},
isbn = {{9783031102974}},
issn = {{2509-2790}},
keywords = {{tet_topic_scattering}},
publisher = {{Springer International Publishing}},
title = {{{Light Scattering by Large Densely Packed Clusters of Particles}}},
doi = {{10.1007/978-3-031-10298-1_4}},
volume = {{8}},
year = {{2022}},
}
@inproceedings{36335,
abstract = {{Transformation of Fe- and Cu-rich primary phase particles was studied in an Al-Li-based alloy prepared by twin-roll casting. Thin foils for combined STEM and SEM experiments were prepared by electrolytic twin-jet polishing. They were in-situ heated in a TEM heating stage and observed at 200 kV in the JEOL JEM 2200FS electron microscope equipped with STEM HAADF and BF detectors and SEM BSE and SE detectors working both in composition and topographic modes. The resulting structures were combined with EDS mapping performed directly in the heating holder. Dissolution and transformation of Cu- and Fe-rich particles occur above 500 °C. EDS maps acquired on the foil cooled down to room temperature show that Cu and Fe are both still present in newly formed particles, most likely indicating the presence of the Al7Cu2Fe phase.}},
author = {{CIESLAR, Miroslav and KŘIVSKÁ, Barbora and KRÁLÍK, Rostislav and BAJTOŠOVÁ, Lucia and Grydin, Olexandr and STOLBCHENKO, Mykhailo and Schaper, Mirko}},
booktitle = {{METAL 2022 Conference Proeedings}},
issn = {{2694-9296}},
keywords = {{Al-Li-based alloy, in-situ TEM, homogenization, phase transformation}},
location = {{Brno}},
publisher = {{TANGER Ltd.}},
title = {{{HOMOGENIZATION OF TWIN-ROLL CAST Al-Li-BASED ALLOY STUDIED BY IN-SITU ELECTRON MICROSCOPY}}},
doi = {{10.37904/metal.2022.4438}},
year = {{2022}},
}
@techreport{36413,
author = {{Becker, Rieke and Lauert, Markus and Fischer, Jessica and Kirchhoff, Hannah and Kornbach, Alina and Januschewski, Katharina}},
title = {{{Tagungsbericht: Unverfügbarkeit – Widmung – Latenz: Das Heilige in der Kultur. Interdisziplinäre Tagung vom 16. bis 18. November 2021 an der Universität Paderborn}}},
year = {{2022}},
}
@inproceedings{36462,
abstract = {{The conduction of structure-borne sound through joints causes energy dissipation. The sound reduction index describes this energy loss as a level decrease in the particle velocity across series-connected damping elements for which the superposition principle applies. This simple model can help to develop a testing method for joints based on this characteristic energy loss. In this paper, this model is experimentally evaluated for multiple in-series clinched aluminium sheets. Samples connected by several clinch points arranged in parallel are investigated experimentally, and the results are discussed.}},
author = {{Stephan, Richard and Brosius, Alexander}},
booktitle = {{The 28th Saxon Conference on Forming Technology SFU and the 7th International Conference on Accuracy in Forming Technology ICAFT}},
keywords = {{clinching, mechanical joining, damping, model, evaluation, dynamics}},
publisher = {{MDPI}},
title = {{{Experimental Measurement Method and Evaluation of an Analytical Approach for Sound Conduction through Multiple Clinched Sheets}}},
doi = {{10.3390/engproc2022026025}},
year = {{2022}},
}
@inproceedings{36473,
abstract = {{Destructive micrograph analysis (MA) is the standard method for the assessment of clinched joints. However, during the joint preparation for the MA, geometric features of the joint can change due to elastic effects and closing cracks. X-ray computed tomography (CT) is a promising alternative to investigate the joint non-destructively. However, if the
material properties of similar joining partners are the same, the CT is not able to correctly resolve surfaces in the joint that are close to or pressing onto each other. These surfaces are relevant for the determination of characteristic dimensions such as neck thickness and undercut. By placing a thin, highly radiopaque tin layer between the joining partners, the interfacial area in the reconstructed volume can be highlighted. In this work, a method for the localisation of the tin layer inside the joint as well as threshold value procedures for the outer joint contour in cross section images are investigated. The measured characteristic dimensions are compared with measured values from MA of the same samples and of samples without tin layer. In addition, possible effects of the tin layer on the joining point
characteristics as well as problems of the MA are discussed.}},
author = {{Busch, Matthias and Köhler, Daniel and Hausotte, Tino and Kupfer, Robert and Troschitz, Juliane and Gude, Maik }},
title = {{{Approach to Determine the Characteristic Dimensions of Clinched Joints by Industrial X-ray Computed Tomography}}},
year = {{2022}},
}