Page 28 - ILK Research Report 2020

DIWA

Consistent analysis and evaluation of manufacturing-related fibre
misorientations in thick-walled fibre-plastic composites

Braiding technology and the high-pressure resin transfer moulding (HP-RTM) Period
process are suitable for the efficient production of thick-walled components 01.04.2020 – 31.03.2023
made of fibre-reinforced plastic (FRP) composites. The stacking of a large num-
ber of textile reinforcement layers, the high infiltration speeds in the HP-RTM Project Director
process and curing effects of the matrix material often lead to production-re- Prof. Dr.-Ing. habil. Maik Gude
lated composite imperfections such as fibre misorientations. These mainly
manifest themselves in the laminate plane, but also become more pronounced Contact Person
in the laminate thickness direction as the laminate thickness increases. The Richard Protz
resulting imperfections are detected, analysed and evaluated in this research Lukas Quirin
project using the example of test panals and a generic test structure made of
glass fibres and polyurethane resin. For this purpose, the sequential produc- Funding
tion steps from insertion of the dry preform into the infiltration tool, through German Research Foundation (DFG)
high-pressure infiltration to curing are examined and documented in a research
data management system. Furthermore, the direction-dependent impregna- Project Partner
tion behaviour of thick-walled mesh structures is characterised with a novel • IFL TU Braunschweig
test method and described by representative volume elements. This provides • IKT Uni Stuttgart
information on the phenomenology of the formation of composite imperfec- • IPC TU Hamburg
tions, the effects of which are evaluated by thermomechanical load tests. The
results obtained serve as a basis for planned work on process simulation.

Radial braiding wheel (left) and HP-RTM infil-
tration system (right) from ILK are used to
manufacture the test plates and structures

Funded by

Test plate with conspicuous fibre misorientations and resin rich areas German Research Foundation

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