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- Article name
- Influence of transverse stitching on stress-strain characteristics and residual strength after impact of laminated polymer composite based on full-strength carbon fabric and epoxy binder
- Authors
- BABAYEVSKY P. G., , info@technologiya.ru, Moscow Aviation Institute (National Research University), Moscow, Russia
SINITSYN A. Yu., , artarea-web@yandex.ru, State Research Center of the Russian Federation "ORPE "Technologiya" named after A. G. Romashin, Obninsk, Kaluga region, Russia
SINITSYNA A. V., , artarea-web@yandex.ru, State Research Center of the Russian Federation "ORPE "Technologiya" named after A. G. Romashin, Obninsk, Kaluga region, Russia
- Keywords
- carbon fiber reinforced epoxy plastic / stitching thread material / out-of-autoclave technologies / vacuum infusion / stitching / residual strength
- Year
- 2019 Issue 4 Pages 39 - 44
- Code EDN
- Code DOI
- Abstract
- Systematic studies were performed to investigate the effect of stitching thread nature, of direction and pitch of transverse stitching on stress-strain characteristics under in-plane tension and compression, as well as residual compression strength after impact of thin sheets of stitched carbon fiber reinforced plastic on the basis of full-strength carbon fabric and epoxy binder in comparison with unstitched control specimens. The studies show that stitching a carbon laminate with a small pitch increases the residual compression strength after the impact of laminated carbon fiber reinforced plastic by 8-58 % (depending on the stitching) parameters in comparison with the unstitched control material, because the stitches prevent crack propagation. At the same time, the influence of the stitching direction and the stitching thread properties on the residual compression strength is much smaller than the influence of the stitching pitch. Decrease of the standard stress-strain characteristics under the in-plane tension and compression of the laminated carbon fiber reinforced plastic due to mechanical curvature and fibers damage during longitudinal and transverse stitching with glass and aramid threads can reach 21 %, in comparison with the unstitched material, depending on the stitching parameters. At the same time, the determining factors here are the stitching pitch (up to 10 %), the stitching direction (5 %) and the stitching thread nature (5 %).
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