@inproceedings{65172,
  abstract     = {{<jats:p>Abstract. The process of joining is used in numerous sectors of the manufacturing industry, where constructions composed of individual components or metal sheets are combined to form complex structures. A straightforward and pervasive approach for joining materials of disparate natures and coated surfaces is clinching. During the clinching process, plastic deformation, residual stresses and damage are introduced into the joint. Due to time-varying service loads cracks can initiate and propagate in the vicinity of the joint which limits the lifetime of the clinched structure. In order to prevent those damage cases, it is crucial to perform fracture mechanical evaluation of cracks in the joint region. Therefore, this publication deals with the question of how plastic deformation, residual stresses and damage need to be considered for the assessment of a crack. For this purpose, simple substitute models are employed to illustrate the principles based on the clinching application example.</jats:p>}},
  author       = {{Weiß, Deborah and Duffe, Tobias and Joy, Tintu David and Kullmer, Gunter}},
  booktitle    = {{Materials Research Proceedings}},
  issn         = {{2474-395X}},
  publisher    = {{Materials Research Forum LLC}},
  title        = {{{Consideration of residual stresses and damage in the fracture mechanical investigation of mechanically joined structures}}},
  doi          = {{10.21741/9781644903551-28}},
  volume       = {{52}},
  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}},
}

@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}},
}

@article{51737,
  author       = {{Kullmer, Gunter and Weiß, Deborah and Schramm, Britta}},
  issn         = {{0013-7944}},
  journal      = {{Engineering Fracture Mechanics}},
  keywords     = {{Mechanical Engineering, Mechanics of Materials, General Materials Science}},
  publisher    = {{Elsevier BV}},
  title        = {{{An alternative and robust formulation of the fatigue crack growth rate curve for long cracks}}},
  doi          = {{10.1016/j.engfracmech.2023.109826}},
  volume       = {{296}},
  year         = {{2024}},
}

@inproceedings{53394,
  author       = {{Kullmer, Gunter and Weiß, Deborah and Schramm, Britta}},
  location     = {{Kassel}},
  publisher    = {{Deutscher Verband für Materialforschung und –prüfung e.V.}},
  title        = {{{Weiterentwicklung des Exponentialansatzes zur Beschreibung von Rissfortschrittskurven}}},
  doi          = {{10.48447/BR-2024-369}},
  year         = {{2024}},
}

@inproceedings{51739,
  author       = {{Weiß, Deborah and Duffe, Tobias and Buczek, Moritz and Kullmer, Gunter and Schramm, Britta}},
  location     = {{Berlin}},
  publisher    = {{Deutscher Verband für Materialforschung und -prüfung e.V.}},
  title        = {{{Bruchmechanische Untersuchung des Dualphasenstahls HCT590X unter Temperatureinfluss}}},
  doi          = {{10.48447/WP-2023-244}},
  year         = {{2023}},
}

@article{31828,
  author       = {{Kupfer, Robert and Köhler, Daniel and Römisch, David and Wituschek, Simon and Ewenz, Lars and Kalich, Jan and Weiß, Deborah and Sadeghian, Behdad and Busch, Matthias and Krüger, Jan and Neuser, Moritz and Grydin, Olexandr and Böhnke, Max and Bielak, Christian Roman and Troschitz, Juliane}},
  issn         = {{2666-3309}},
  journal      = {{Journal of Advanced Joining Processes}},
  keywords     = {{Mechanical Engineering, Mechanics of Materials, Engineering (miscellaneous), Chemical Engineering (miscellaneous)}},
  publisher    = {{Elsevier BV}},
  title        = {{{Clinching of Aluminum Materials – Methods for the Continuous Characterization of Process, Microstructure and Properties}}},
  doi          = {{10.1016/j.jajp.2022.100108}},
  volume       = {{5}},
  year         = {{2022}},
}

@article{31238,
  author       = {{Kupfer, Robert and Köhler, Daniel and Römisch, David and Wituschek, Simon and Ewenz, Lars and Kalich, Jan and Weiß, Deborah and Sadeghian, Behdad and Busch, Matthias and Krüger, Jan Tobias and Neuser, Moritz and Grydin, Olexandr and Böhnke, Max and Bielak, Christian-Roman and Troschitz, Juliane}},
  issn         = {{2666-3309}},
  journal      = {{Journal of Advanced Joining Processes}},
  keywords     = {{Mechanical Engineering, Mechanics of Materials, Engineering (miscellaneous), Chemical Engineering (miscellaneous)}},
  publisher    = {{Elsevier BV}},
  title        = {{{Clinching of Aluminum Materials – Methods for the Continuous Characterization of Process, Microstructure and Properties}}},
  doi          = {{10.1016/j.jajp.2022.100108}},
  year         = {{2022}},
}

@article{34215,
  abstract     = {{Clinching as a mechanical joining technique allows a fast and reliable joining of metal sheets in large-scale production. An efficient design and dimensioning of clinched joints requires a holistic understanding of the material, the joining process and the resulting properties of the joint. In this paper, the process chain for clinching metal sheets is described and experimental techniques are proposed to analyze the process-microstructure-property relationships from the sheet metal to the joined structure. At the example of clinching aluminum EN AW 6014, characterization methods are applied and discussed for the following characteristics: the mechanical properties of the sheet materials, the tribological behavior in the joining system, the joining process and the resulting material structure, the load-bearing behavior of the joint, the damage and degradation as well as the service life and crack growth behavior. The compilation of the characterization methods gives an overview on the advantages and weaknesses of the methods and the multiple interactions of material, process and properties during clinching. In addition, the results of the analyses on EN AW 6014 can be applied for parameterization and validation of simulations.}},
  author       = {{Kupfer, Robert and Köhler, Daniel and Römisch, David and Wituschek, Simon and Ewenz, Lars and Kalich, Jan and Weiß, Deborah and Sadeghian, Behdad and Busch, Matthias and Krüger, Jan Tobias and Neuser, Moritz and Grydin, Olexandr and Böhnke, Max and Bielak, Christian Roman and Troschitz, Juliane}},
  issn         = {{2666-3309}},
  journal      = {{Journal of Advanced Joining Processes}},
  keywords     = {{Mechanical Engineering, Mechanics of Materials, Engineering (miscellaneous), Chemical Engineering (miscellaneous)}},
  publisher    = {{Elsevier BV}},
  title        = {{{Clinching of Aluminum Materials – Methods for the Continuous Characterization of Process, Microstructure and Properties}}},
  doi          = {{10.1016/j.jajp.2022.100108}},
  volume       = {{5}},
  year         = {{2022}},
}

@inproceedings{35271,
  author       = {{Weiß, Deborah and Schramm, Britta}},
  booktitle    = {{Procedia Structural Integrity}},
  issn         = {{2452-3216}},
  keywords     = {{General Engineering, Energy Engineering and Power Technology}},
  location     = {{Madeira}},
  pages        = {{879--885}},
  publisher    = {{Elsevier BV}},
  title        = {{{Fracture mechanical investigation of preformed metal sheets using a novel CC-specimen}}},
  doi          = {{10.1016/j.prostr.2022.12.111}},
  volume       = {{42}},
  year         = {{2022}},
}

@article{34224,
  abstract     = {{Crack growth in structures depends on the cyclic loads applied on it, such as mechanical, thermal and contact, as well as residual stresses, etc. To provide an accurate simulation of crack growth in structures, it is of high importance to integrate all kinds of loading situations in the simulations. Adapcrack3D is a simulation program that can accurately predict the propagation of cracks in real structures. However, until now, this three-dimensional program has only considered mechanical loads and static thermal loads. Therefore, the features of Adapcrack3D have been extended by including contact loading in crack growth simulations. The numerical simulation of crack propagation with Adapcrack3D is generally carried out using FE models of structures provided by the user. For simulating models with contact loading situations, Adapcrack3D has been updated to work with FE models containing multiple parts and necessary features such as coupling and surface interactions. Because Adapcrack3D uses the submodel technique for fracture mechanical evaluations, the architecture of the submodel is also modified to simulate models with contact definitions between the crack surfaces. This paper discusses the newly implemented attribute of the program with the help of illustrative examples. The results confirm that the contact simulation in Adapcrack3D is a major step in improving the functionality of the program.}},
  author       = {{Joy, Tintu David and Weiß, Deborah and Schramm, Britta and Kullmer, Gunter}},
  issn         = {{2076-3417}},
  journal      = {{Applied Sciences}},
  keywords     = {{Fluid Flow and Transfer Processes, Computer Science Applications, Process Chemistry and Technology, General Engineering, Instrumentation, General Materials Science}},
  number       = {{15}},
  publisher    = {{MDPI AG}},
  title        = {{{Further Development of 3D Crack Growth Simulation Program to Include Contact Loading Situations}}},
  doi          = {{10.3390/app12157557}},
  volume       = {{12}},
  year         = {{2022}},
}

@inproceedings{30726,
  author       = {{Weiß, Deborah and Schramm, Britta and Kullmer, Gunter}},
  booktitle    = {{Procedia Structural Integrity}},
  issn         = {{2452-3216}},
  keywords     = {{General Engineering, Energy Engineering and Power Technology}},
  location     = {{online}},
  pages        = {{139--147}},
  publisher    = {{Elsevier BV}},
  title        = {{{Influence of plane mixed-mode loading on the kinking angle of clinchable metal sheets}}},
  doi          = {{10.1016/j.prostr.2022.03.082}},
  volume       = {{39}},
  year         = {{2022}},
}

@article{34070,
  author       = {{Schramm, Britta and Harzheim, Sven and Weiß, Deborah and Joy, Tintu David and Hofmann, Martin and Mergheim, Julia 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        = {{{A Review on the Modeling of the Clinching Process Chain - Part III: Operational Phase}}},
  doi          = {{10.1016/j.jajp.2022.100135}},
  year         = {{2022}},
}

@article{34246,
  author       = {{Kullmer, Gunter and Weiß, Deborah and Schramm, Britta}},
  issn         = {{0013-7944}},
  journal      = {{Engineering Fracture Mechanics}},
  keywords     = {{Mechanical Engineering, Mechanics of Materials, General Materials Science}},
  publisher    = {{Elsevier BV}},
  title        = {{{Development of a method for the separate measurement of the growth of internal crack tips by means of the potential drop method}}},
  doi          = {{10.1016/j.engfracmech.2022.108899}},
  year         = {{2022}},
}

@article{34403,
  abstract     = {{For a reliable, strength-compliant and fracture-resistant design of components and technical structures and for the prevention of damage cases, both the criteria of strength calculation and fracture mechanics are essential. In contrast to strength calculation the fracture mechanics assumes the existence of cracks which might further propagate due to the operational load. First, the present paper illustrates the general procedure of a fracture mechanical evaluation of fatigue cracks in order to assess practical damage cases. Fracture mechanical fundamentals which are essential for the calculation of the stress intensity factors <jats:italic>K</jats:italic>
                  <jats:sub>I</jats:sub> and the experimental determination of fracture mechanical material parameters (e.g. threshold Δ<jats:italic>K</jats:italic>
                  <jats:sub>I,th</jats:sub> against fatigue crack growth, crack growth rate curve) are explained in detail. The subsequent fracture mechanical evaluation on the basis of the local stress situation at the crack tip and the fracture mechanical material data is executed for different materials and selected crack problems. Hereby, the main focus is on the material HCT590X as it is the essential material being investigated by TRR285.</jats:p>}},
  author       = {{Schramm, Britta and Weiß, Deborah}},
  issn         = {{0025-5300}},
  journal      = {{Materials Testing}},
  keywords     = {{Mechanical Engineering, Mechanics of Materials, General Materials Science}},
  number       = {{10}},
  pages        = {{1437--1449}},
  publisher    = {{Walter de Gruyter GmbH}},
  title        = {{{Fracture mechanical evaluation of the material HCT590X}}},
  doi          = {{10.1515/mt-2022-0191}},
  volume       = {{64}},
  year         = {{2022}},
}

@inproceedings{34472,
  author       = {{Kullmer, Gunter and Weiß, Deborah and Schramm, Britta}},
  location     = {{Bremen}},
  pages        = {{107--116}},
  title        = {{{Entwicklung einer Methode zur differenzierten Messung des Wachstums der Rissenden von Innenrissen mit der Elektropotentialmethode}}},
  doi          = {{10.48447/BR-2021-013}},
  volume       = {{DVM-Bericht 253}},
  year         = {{2021}},
}

@inproceedings{24006,
  author       = {{Weiß, Deborah and Schramm, Britta and Neuser, Moritz and Grydin, Olexandr and Kullmer, Gunter}},
  location     = {{Bremen}},
  pages        = {{231--240}},
  title        = {{{Experimentelle bruchmechanische Untersuchung eines clinchgeeigneten Bleches aus HCT590X mithilfe einer neuen Probengeometrie}}},
  doi          = {{10.48447/BR-2021-025}},
  volume       = {{DVM-Bericht 253}},
  year         = {{2021}},
}

@inproceedings{30675,
  abstract     = {{<jats:p>In many areas of product manufacturing constructions consist of individual components and metal sheets that are joined together to form complex structures. A simple and industrial common method for joining dissimilar and coated materials is clinching. During the joining process and due to the service load cracks can occur in the area of the joint, propagate due to cyclic loading and consequently lead to structural failure. For the prevention of these damage cases, first of all knowledge about the fracture mechanical material parameters regarding the original material state of the sheet metals used within the clinching process are essential.Within the scope of this paper experimental and numerical preliminary investigations regarding the fracture mechanical behavior of sheet metals used within the clinching process are presented. Due to the low thickness of 1.5 mm of the material sheets, the development of a new specimen is necessary to determine the crack growth rate curve including the fracture mechanical parameters like the threshold against crack growth ΔK<jats:sub>I,th</jats:sub> and the fracture toughness K<jats:sub>IC</jats:sub> of the base material HCT590X. For the experimental determination of the crack growth rate curve the numerical calculation of the geometry factor function as well as the calibration function of this special specimen are essential. After the experimental validation of the numerically determined calibration function, crack growth rate curves are determined for the stress ratios <jats:italic>R</jats:italic> = 0.1 and <jats:italic>R</jats:italic> = 0.3 to examine the mean stress sensitivity. In addition, the different rolling directions of 0° and 90° in relation to the initial crack are taken into account in order to investigate the influence of the anisotropy due to rolling.</jats:p>}},
  author       = {{Weiß, Deborah and Schramm, Britta and Kullmer, Gunter}},
  booktitle    = {{Key Engineering Materials}},
  issn         = {{1662-9795}},
  keywords     = {{Mechanical Engineering, Mechanics of Materials, General Materials Science}},
  location     = {{online}},
  pages        = {{127--132}},
  publisher    = {{Trans Tech Publications, Ltd.}},
  title        = {{{Numerical and Experimental Fracture Mechanical Investigations of Clinchable Sheet Metals Made of HCT590X}}},
  doi          = {{10.4028/www.scientific.net/kem.883.127}},
  volume       = {{883}},
  year         = {{2021}},
}

@article{30674,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>In addition to the classical strength calculation, it is important to design components with regard to fracture mechanics because defects and cracks in a component can drastically influence its strength or fatigue behavior. Cracks can propagate due to operational loads and consequently lead to component failure. The fracture mechanical analysis provides information on stable or unstable crack growth as well as about the direction and the growth rate of a crack. For this purpose, sufficient information has to be available about the crack location, the crack length, the component geometry, the component loading and the fracture mechanical material parameters. The fracture mechanical properties are determined experimentally with standardized specimens as defined by the guidelines of the American Society for Testing and Materials. In practice, however, especially in the context with damage cases or formed material fracture mechanical parameters directly for a component are of interest. However, standard specimens often cannot be extracted at all due to the complexity of the component geometry. Therefore, the development of special specimens is required whereby certain arrangements have to be made in advance. These arrangements are presented in the present paper in order to contribute to a holistic investigation chain for the experimental determination of fracture mechanical material parameters with special specimens.</jats:p>}},
  author       = {{Weiß, Deborah and Schramm, Britta and Kullmer, Gunter}},
  issn         = {{0944-6524}},
  journal      = {{Production Engineering}},
  keywords     = {{Industrial and Manufacturing Engineering, Mechanical Engineering}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Holistic investigation chain for the experimental determination of fracture mechanical material parameters with special specimens}}},
  doi          = {{10.1007/s11740-021-01096-6}},
  year         = {{2021}},
}

@inproceedings{24012,
  author       = {{Kullmer, Gunter and Weiß, Deborah and Bauer, Benjamin and Richard, Hans Albert}},
  location     = {{Hamburg}},
  pages        = {{61--70}},
  title        = {{{Entwicklung einer Axialrissprobe zur Ermittlung von bruchmechanischen Kennwerten für Rohre}}},
  volume       = {{DVM-Bericht 252}},
  year         = {{2020}},
}

