JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 25

testing MANUFACTURlNG
Optical data rectification and
ML-aided impedance analysis for
quality assurance of carbon fibre
Lukas LechthaLer, Head of Staple Fibre Technologies
svante May, Research Assistant
thoMas Gries, Director
Institut für Textiltechnik (ITA) of
RWTH Aachen University
richard kupke, Director Product management
Suragus GmbH
dirk FeLtin, CEO
Hightex Verstärkungsstrukturen GmbH
paweL Latasiewicz, System development NCF
Inspection
Saertex GmbH & Co. KG
christine staMM, Manager Technical Service
Teijin Europe GmbH
The overall objective of the EddySCARF research project conducted
by the German Central Innovation Programme for SMEs
(ZIM) is to reduce costs, time and resources in carbon fibre production
and processing through appropriate quality assurance.
For this purpose, an eddy current sensor is being developed
that allows 100% non-contact online inspection of carbon fibre
(CF) rovings. In previous publications, it was shown that the
detection of fibre damage by means of eddy current is possible
(JEC Composites Magazine, 2020, H. 136, S. 59-61) and that
complex impedance can be evaluated by means of machine
learning algorithms (JEC Composites Magazine, 2021, H. 141,
S. 51-53).
C
arbon fibres have excellent mechanical
properties such as high strength
and stiffness combined with
low density. Due to these properties,
demand and production capacity have
been growing steadily for years [1]. An
approach to achieve greater efficiency
for the growing number of mass-produced
applications of CF and carbon
fibre-reinforced plastics (CFRP) is to
reduce costs, time and resources. This
can be implemented through the early
detection of hidden defects already in
the CF roving. For this purpose, an eddy
current sensor is being developed within
the scope of the ZIM EddySCARF
research project, which enables 100%
non-contact online inspection of CF
rovings. The
complex measurement
signal, the impedance, is evaluated using
machine learning (ML) algorithms
from the field of unsupervised learning.
Fig. 1: Schematic representation of the KDD cycle according to [2]
N°147 September - October 2022 / jec composites magazine
25
The procedure used to further develop
the ML algorithm follows the KDD
(Knowledge Discovery in Database)
cycle, which is used to derive knowledge
from data in the area of artificial intelligence
(Figure 1) [2].
KDD Cycle 1:
selection - experimental setup
The ITA Tribometer, the tribological test
bench of the Institute für Textiltechnik
of RWTH Aachen University, Aachen, is
used for data collection. The measuring
section of the test bench is equipped
with an eddy current sensor and a camera
module provided by the research partner
Suragus GmbH (Figure 2). The damage
module is integrated in order to specifically
adjust the damage level of the CF
roving to generate reproducible measurement
data. The CF roving used is a 12k
roving of type HTS-40 F13 provided by
the project partner Teijin Carbon Europe
GmbH, Wuppertal.

JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022

Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022

Cover
Edito
Creating the interior of “The most beautiful building in the world”
Contents
NEWS
In brief
Agenda
Perspectives - Creating a forum to work together
Opening - New fibreglass factory in the heart of Central Asia
BUSINESS
Graphene - Effectiveness of graphene nano-platelets in composites
Carbon fibre - Sinopec intends to lead by example in China
Glass fibre - China promotes the use of glass fibre in construction
MANUFACTURING
Additive manufacturing - Towards a digital twin of UD tapes for automated fibre placement
Testing - Optical data rectification and ML-aided impedance analysis for quality assurance of carbon fibre
FEATURE AUTOMOTIVE: How are composites driving the future of automotive?
- Transportation - Thermoplastic composites: the path towards zero CO2 emissions in transport
- Compounding: Cutting-edge FDC technology reduces costs and CO2 emissions
- Pressure vessels: Enabling superior storage efficiency for Type 4 tanks with FPP dome reinforcements
- Battery: A new generation of battery packs with a recyclable epoxy SMC casing
- Lightweighting: Serial CFRTP structural part for BMW body-in-white application
- Natural fibre: Towards lightweight flax fibre-reinforced automotive headliners
SOLUTION
Sustainability - Upcycling gives a boost to coffee waste management
Defence - On field applications with composites
TECHNOLOGY
Ceramic: Cerapreg – a new concept for cost-effective reinforced ceramic composites
Index
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JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - Cover
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 2
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - Edito
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - Creating the interior of “The most beautiful building in the world”
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 5
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - Contents
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 7
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - In brief
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - Agenda
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - Perspectives - Creating a forum to work together
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - Opening - New fibreglass factory in the heart of Central Asia
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 12
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 13
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - Graphene - Effectiveness of graphene nano-platelets in composites
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 15
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 16
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - Carbon fibre - Sinopec intends to lead by example in China
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 18
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 19
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - Glass fibre - China promotes the use of glass fibre in construction
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 21
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 22
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - Additive manufacturing - Towards a digital twin of UD tapes for automated fibre placement
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 24
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - Testing - Optical data rectification and ML-aided impedance analysis for quality assurance of carbon fibre
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 26
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 27
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 28
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 29
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - - Transportation - Thermoplastic composites: the path towards zero CO2 emissions in transport
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 31
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - - Compounding: Cutting-edge FDC technology reduces costs and CO2 emissions
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 33
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 34
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - - Pressure vessels: Enabling superior storage efficiency for Type 4 tanks with FPP dome reinforcements
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - - Battery: A new generation of battery packs with a recyclable epoxy SMC casing
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 37
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 38
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 39
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - - Lightweighting: Serial CFRTP structural part for BMW body-in-white application
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 41
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 42
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 43
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 44
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - - Natural fibre: Towards lightweight flax fibre-reinforced automotive headliners
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 46
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 47
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - Sustainability - Upcycling gives a boost to coffee waste management
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 49
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - Defence - On field applications with composites
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 51
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - Ceramic: Cerapreg – a new concept for cost-effective reinforced ceramic composites
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 53
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - Advertisers
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 55
JEC COMPOSITES MAGAZINE - Issue #147 - September/October 2022 - 56
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