Formability Evaluation Of Carbon Fiber NCF By
A Non-contact 3D Strain Measurement System
And The Effects Of Blank Folder Force On
Its Formability
Author(s)
K. Tanaka, R. Ushiyama, T. Katayama, S. Enoki
& H. Sakamoto
Abstract
Non-Crimp Fabric (NCF) consists of unidirectional plies, which are kept together
by stitching yarns arranged in a number of different orientations relative to the
fabric production direction. Since NCF has no crimp, NCF can take full advantage
of the continuous carbon fibers.
As NCF is deformed mainly due to shear deformation, it is difficult to form
3D shapes from it. Therefore, formability improvement of NCF by slitting a
textile preform has been attempted; however, problems such as strength
degradation at a notch and cost increase due to the increase of working process
have occurred. So, it is necessary to improve formability of NCF without slitting.
One of the methods of formability improvement is to use blank holder force. In
previous studies, though the influence of blank holder force on formability of
woven fabrics has been clarified, that on formability of NCF is uncertain.
In this study, the hemisphere geometry punch drape test was conducted to
evaluate the influence of blank holder force on the formability of NCF.
Meanwhile, deformation of NCF during the drape test was measured by a
non-contact 3D strain measurement system.
Keywords: carbon fibers, non-crimp fabric (NCF), blank holder force,
non-contact 3D strain measurement system, drape test.
Keywords
carbon fibers, non-crimp fabric (NCF), blank holder force,
non-contact 3D strain measurement system, drape test.
Related Book
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