@article{30688,
  abstract     = {{Thermally supported clinching (Hotclinch) is a novel promising process to join dissimilar materials. Here, metal and fibre-reinforced thermoplastics (FRTP) are used within this single step joining process and without the usage of auxiliary parts like screws or rivets. For this purpose, heat is applied to improve the formability of the reinforced thermoplastic. This enables joining of the materials using conventional clinching-tools. Focus of this work is the modelling on mesoscopic scale for the numerical simulation of this process. The FTRP-model takes the material behaviour both of matrix and the fabric reinforced organo-sheet under process temperatures into account. For describing the experimentally observed phenomena such as large deformations, fibre failure and the interactions between matrix and fibres as well as between fibres themselves, the usage of conventional, purely Lagrangian based FEM methods is limited. Therefore, the combination of contact-models with advanced modelling approaches like Arbitrary-Lagrangian-Eulerian (ALE), Coupled-Eulerian-Lagrangian (CEL) and Smooth-ParticleHydrodynamics (SPH) for the numerical simulation of the clinching process are employed. The different approaches are compared with regard to simulation feasibility, robustness and results accuracy. It is shown, that the CEL approach represents the most promising approach to describe the clinching process. }},
  author       = {{Gröger, B. and Hornig, A. and Hoog, A. and Gude, M.}},
  journal      = {{ESAFORM 2021 - 24th International Conference on Material Forming}},
  title        = {{{Modelling of thermally supported clinching of fibre-reinforced thermoplastics: Approaches on mesoscale considering large deformations and fibre failure}}},
  doi          = {{10.25518/esaform21.4293}},
  year         = {{2021}},
}

@article{30689,
  abstract     = {{Joining and local forming processes for fibre-reinforced thermoplastics (FRTP) like hole-forming or variations of the clinching process require an in-depth understanding of the process induced effects on meso-scale. For numerical modelling with a geometrical description of a woven fabric, adequate material models for a representative unit cell are identified. Model calibration is achieved employing a mesoscopic finite-element-approach using the embedded element method based on tensile tests of the consolidated organo-sheets and a phenomenological evaluation of photomicrographs. The model takes temperature dependent stiffness and fibre tension failure into account. }},
  author       = {{Gröger, B. and Hornig, A. and Hoog, A. and Gude, M.}},
  journal      = {{Key Engineering Materials}},
  pages        = {{49}},
  title        = {{{Temperature dependent modelling of fibre-reinforced thermoplastic organo-sheet material for forming and joining process simulations}}},
  doi          = {{10.4028/www.scientific.net/KEM.883.49}},
  volume       = {{883 KEM}},
  year         = {{2021}},
}

@article{51199,
  abstract     = {{<jats:title>Abstract</jats:title><jats:p>Recent developments in automotive and aircraft industry towards a multi-material design pose challenges for modern joining technologies due to different mechanical properties and material compositions of various materials such as composites and metals. Therefore, mechanical joining technologies like clinching are in the focus of current research activities. For multi-material joints of metals and thermoplastic composites thermally assisted clinching processes with advanced tool concepts are well developed. The material-specific properties of fibre-reinforced thermoplastics have a significant influence on the joining process and the resulting material structure in the joining zone. For this reason, it is important to investigate these influences in detail and to understand the phenomena occurring during the joining process. Additionally, this provides the basis for a validation of a numerical simulation of such joining processes. In this paper, the material structure in a joint resulting from a thermally assisted clinching process is investigated. The joining partners are an aluminium sheet and a thermoplastic composite (organo sheet). Using computed tomography enables a three-dimensional investigation that allows a detailed analysis of the phenomena in different joining stages and in the material structure of the finished joint. Consequently, this study provides a more detailed understanding of the material behavior of thermoplastic composites during thermally assisted clinching.</jats:p>}},
  author       = {{Gröger, Benjamin and Köhler, Daniel and Vorderbrüggen, Julian and Troschitz, Juliane and Kupfer, Robert and Meschut, Gerson and Gude, Maik}},
  issn         = {{0944-6524}},
  journal      = {{Production Engineering}},
  keywords     = {{Industrial and Manufacturing Engineering, Mechanical Engineering}},
  number       = {{2-3}},
  pages        = {{203--212}},
  publisher    = {{Springer Science and Business Media LLC}},
  title        = {{{Computed tomography investigation of the material structure in clinch joints in aluminium fibre-reinforced thermoplastic sheets}}},
  doi          = {{10.1007/s11740-021-01091-x}},
  volume       = {{16}},
  year         = {{2021}},
}

@article{30704,
  author       = {{Böhm, H. and Zhang, H. and Gröger, B. and Hornig, A. and Gude, M.}},
  journal      = {{Journal of Composites Science}},
  pages        = {{188}},
  title        = {{{Characterization and Numerical Modelling of Through-Thickness Metallic-Pin-Reinforced Fibre/Thermoplastic Composites under Bending Loading}}},
  doi          = {{10.3390/jcs4040188}},
  volume       = {{4}},
  year         = {{2020}},
}

@article{30712,
  author       = {{Köhler, D. and Gröger, B. and Kupfer, R. and Hornig, A. and Gude, M.}},
  journal      = {{Procedia Manufacturing}},
  pages        = {{940--947}},
  title        = {{{Experimental and Numerical Studies on the Deformation of a Flexible Wire in an Injection Moulding Process}}},
  doi          = {{10.1016/j.promfg.2020.04.288}},
  volume       = {{47}},
  year         = {{2020}},
}