Трение высокопрочных арамидных нитей и методика его изучения

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Трение высокопрочных арамидных нитей и методика его изучения
Инженерный журнал: наука и инновации # 8·2017 7
High-strength aramid fibers friction
and methodology for its study
© S.V. Kotomin
Bauman Moscow State Technical University, Moscow, 105005, Russia
A.V. Topchiev Institute of Petrochemical Synthesis, RAS,
Moscow, 119991, Russia
The article suggests the methodology for evaluating the aramid fibers friction coefficient
in the “thread-to-thread” friction regime. This is essential for manufacturing the fabric
fibrous structures used in the ballistic protection items of equipment. The test pattern
represents a thread moving through the stationary loop that allows calculating the fric-
tion coefficient according to the Euler formula when testing on the conventional stretch-
ing apparatus without any appurtenances. We have examined the friction of various
threads and loose ropes in dry and wet states and demonstrated a significant increase in
the friction coefficient when moisturizing the threads. The aramid fibers with the crystal-
line structure (Kevlar, Armalon) have a higher friction coefficient compared to the fibers
which have an amorphous structure (Rusar). The introduced material will be useful for
the specialists who address the issues of testing the aramid fibers and producing the bal-
listic protection items which have aramid fibers in their composition.
Keywords: friction, aramid fibers, ballistic protection
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Kotomin S.V. graduated from Dmitry Mendeleev University of Chemical Technology of
Russia in 1974. Dr. Sc. (Chem.), Professor of the Chemistry Department, Bauman Mos-
cow State Technical University, Leading Research Scientist of A.V. Topchiev Institute of
Petrochemical Synthesis, RAS. Author of 120 scientific works in the field of physical
chemistry and polymers and composites processing. e-mail: