Target modification of constructional epoxy-carbon plastics as a materials science approach to the effect of mechanical joints orifices on bearing capacity

Аuthors

Nasonov F. A.^1*, Gavrilov G. A.^1**, Babaitsev A. V.^2***, Nazyrova O. R.^2****

1. PJSC UAC Sukhoi Design Bureau, 23A, Polikarpova str., Moscow, 125284, Russia
2. Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia

*e-mail: nasonovf2006@mail.ru
**e-mail: gg1986@mail.ru
***e-mail: ar77eny@gmail.com
****e-mail: norton_07@mail.ru

Abstract

The materials science approach to polymer matrices physic-mechanical properties management requires the assessment of modifying additives impact on technological and main operational properties of compositions. Works on studying and intercomparing the main technological properties of the initial epoxy composition and the one modified by technological Zinc Stearate (ZC) technological addition were conducted by viscosimetry and thermo-analytic methods. The developed kinetic model of the compositions hardening process revealed the trifling impact of the composition modification on the hardening process. Pilot samples from the plastics filled with carbon long-fibered fillers (impregnating under pressure and autoclave molding) were fabricated, and their non-destructive control and standard samples testing were performed for mechanical properties measuring.

Estimation by the computer tomography method revealed the stability augmentation of material structure along the edge of the orifice contour after machining for carbon plastics modified by ZC within the interval of 0.1-2% of mass. Thermal effects measuring of machining processes with various tools were performed by IR-thermography method combined with recording function at the specified intervals. The dependence of thermal effects from the modifier concentration was established. The article demonstrates that while this parameter measuring as an integral characteristic, temperatures reduction (temperatures maximums) is observed at the modifier content in matrix samples of 0.1–0.3% by weight, and at the content of 0.2–0.5% by weight in the carbon plastic samples (depending on the applied tool).

Keywords:

polymer composite material, epoxy matrix, epoxy-carbon plastic, technological properties, IR-thermography, profilometry

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