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were tested according to UL94 HV standard. It was found that fire resistance of prepared specimens depended
on homogenization temperature and organoclay dispersion in the composite precursor mixture …
Title: Non-crimped fabrics: Production, Tendency of Development and there potentials
for aircraft structures
Authors: F. Kruse, Prof. T. Gries
RWTH Aachen
Time: November 5, 2009 2:40 pm
Room: Candela
A longheaded focus of research at the Institute for Textile Techniques of the RWTH Aachen (ITA) is the development
of efficient automated production technologies for shell structures made of fibre composite materials.
In this process dry textile semi-finished products such as multiaxial layers, fabrics or braids are joined to a nearnetshape
textile structure by stitching or binders. These so called preforms are then impregnated in one shot.
An example for the industrial application of this production technology is the pressure bulkhead of the Airbus
A 380.
Especially for shell structures multiaxial, non-crimped fabrics (NCFs) are gaining importance as the semi-finished
product to start from. These NCFs contain up to seven layers which can be produced with orientations up
to +/-20° to the direction of production. 0°-layers can be supplied additionally, but only as the last layer on the
topside of the NCFs. The single layers are fixed by knitting and therefore form an easy to handle, plain structure
of any desired length.
By the use of NCF a highly lessened time is needed for the production of large components such as the wingshells
or sparwebs can be expected. Instead of a multitude of unidirectional prepreg-layers which need to be
laid singulary and slowly by a tape laying machine, the layup now consists of only a few multiaxial NCFs with
the desired layer-setup.
Beside of all advanteges, the production of NCFs is actually restricted to a constant arealweight and constant
width. Thus, an aim of the current research program DFG Researchgroup 860 at the ITA, is to develop the
machines in a way that NCFs with several local reinforcements can be produced continually. This is done by
an innovative supply modul, which cuts preproduced NCFs or UD-Layer to the desired length and feeds them
on the basis layers.
On second focus of the currend research at the ITA is the warpknitting-unit. As a result to the undulation of the
warpknitting-stitches, the ultimate (compression-) strenght in the plain of the laminate usually lower than those of
prepregs. On the other hand, the stitches have a positive effect in cases of impact-loads. Hence the goal was,
to change the knitting-type, the stiching-length and the tension of the knitting yarn continuously while production.
To fulfill this mission, a newly electromechanical driven an computer controlled guidebar was developed
instead of the common mechanical cams-disks. This new guidebar drive can also be used, to change the drapability
of the produced NCF locally.
The oral presentation will close with an outlook on futher developing goals like production of near-netshape
NCFs to reduce the waste of expensive high performance fibres.
51
LEVEL VIA LEVEL C
SEE YOU AGAIN AT AIRTEC 2010
November 02 - 04, 2010
4th International Conference „Supply on the wings“
Aerospace - Innovation through international cooperation
in conjunction with the International Aerospace Supply Fair
AIRTEC 2009
Room Frequenz 1
Entrance (P11)
Room Lumen
Room Candela
Entrance (P11)
Airbus and FTI Rely on Right Hemisphere Software for CG Animations
and Fly-Throughs of Massive New A380 Test Rig
Software Enables Airbus to Communicate Progress, Capabilities of Rig to Non-engineers,
Investors, Government Officials, and Dispersed Personnel
SIGGRAPH — August 9, 2004, Los Angeles, CA — Right Hemisphere, a leading provider of
visual communication solutions software, today announced that Airbus and FTI Engineering
Network GmbH used the company’s software to communicate the progress and capabilities of the
huge new A380 High Lift Test Rig (HLSTR). A critical device of massive scale and built
specifically for the testing, certification, and authorization of the world’s largest airliner, the HLSTR
was ceremoniously put into operation on June 4. Using Right Hemisphere software, FTI created
computer-generated animations and “fly throughs” of the rig to visually communicate its function.
Department Leader High Lift Test, Airbus Deutschland Bremen Jens Strahmann said, “Having
theability to animate special, complex sections of the test system – like the Inner Middle Outer
Flap with its Hexapod System – is critical to convey their precise movement and function to a
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