Page 31 - Research Report 2021 - Institut für Leichtbau und Kunststofftechnik

SFB/TRR 285 - A03

Calculation and evaluation of process-induced material structure
phenomena in FRP-metal connections

The connection of lightweight structures made of fibre-reinforced plastic (FRP) Period
with thermoplastic matrix in complex assemblies with dissimilar materials is a 01.07.2019 – 30.06.2023
challenging task. However, the specific material properties of the FRP enable
the development of novel joining technologies with dissimilar joining partners. Project management
The joining processes are accompanied by local changes in the material struc- Prof. Dr.-Ing. habil. Maik Gude
ture of the FRP. Within the framework of the sub-project, the change of the
local material structure during joining are investigated both experimentally Contact
and numerically. A simulation chain from the joining process to the evaluation Dr.-Ing. Andreas Hornig
of these FRP-metal joints is being developed. For this purpose, a technology Benjamin Gröger
map of all continuous fibre-reinforced FRP clinching processes was created. A
phenomenological investigation was carried out on a hotclinch joint by means Funding
of computer tomography images. The numerical description of such forming Funded by
phenomena was tested and verified on moulding processes of FRP into a
contoured mould. Hereby, the combination of the Euler-Lagrange approach
with microscopic modelling could already show the potential to predict the German Research Foundation
resulting material structure. In the further course of the project, the obtained German Research Foundation (DFG)
numerical elaborated modelling approaches are to be validated with newly
developed test environments. Project number: 418701707 – TRR 285

deformed shape of multi-filaments
without matrix

deformed shape of multi-filaments
including matrix

Source: [1]
Numerical forming by using an Eulerian-Lagrangian-Approach on microscale.

[1] Gröger, B.; Würfel, V.; Hornig, A.; Gude, M. Forming process induced material structure of fibre-reinforced thermoplastics – Experimental and numerical investigation of a
bladder-assisted moulding process. Journal of Advanced Joining Processes, Volume 5, 2022, 100100. https://doi.org/10.1016/j.jajp.2022.100100.

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