Comparison of modal characteristic of wrapped and winded composite tubes from carbon prepreg
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Date
2017
Authors
Journal Title
Journal ISSN
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Publisher
JVE International
Abstract
Constructions based on long fiber composite frames gaining significant and
irreplaceable position through almost all traffic sectors. The aim of this presented work is a study
of composite rods made by two ways from pre impregnated fibres. In technical practice, one can
find applications of so called “prepregs”, especially for so-called wrapping, which is a gradual
helical layering of wide tapes. This is a quite simply method with a good quality of final parts, but
the using is limited only for straight shapes. Therefore, a method called winding, which is a
simultaneous deposition of larger number of fiber filaments was used to handle the problem for
curved shapes and fluently changed cross-sections. Even though this method could expand the
using of presaturated fibres, in a real case compared with wrapped parts there is evident imperfect
alignment and mutually storing of placed fibers. This could be mainly caused by a significant
tortuosity and stickiness of the individual fiber strands. The objective the carried work was to
experimentally compare the vibrational - modal behavior of two almost identical rods. One was
winded and the second kind was wrapped with the same structure of layers, weight and curing
parameters. The results of the two compared tubes, that should be theoretically identical, were
significantly different. Another step was compilation of a numerical model and verify its
suitability for parts created with the two mentioned production methods. The numerical model
was in a good agreement with the empirical obtained from the experiment with wrapped parts.
However, the using of this standard model also for winded tube is questionable, because of the
significantly differences in founded natural frequencies.
Description
Subject(s)
Carbon, Composite, Modal, Vibration, Winding
Citation
ISSN
2345-0533