The study of intermediate plasma-sprayed layer effect on fiberglass-metal junction strength

Аuthors

Babin S. V.^1*, Fursov A. A.², Egorov E. N.²

1. ,
2. Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia

*e-mail: babinsv@mati.ru

Abstract

The study of laminate composite materials, compounds of dissimilar materials and hybrid composite materials for increasing their strength, fatigue strength and reliability is a topical problem for aircraft building.

This work studies the technique for increasing strength of fiberglass with AB-T1 aluminum alloy compound and fatigue strength of hybrid composite material by intermediate layer creation.

To reinforce composite compound intermediate rugged porous layer, obtained by plasma-sprayed method. The paper performed comparative analysis, sel ected materials and modes to such layer formation. Fatigue testing of hybrid composites samples was carried out. Temperature effect on shear strength of a composite compound was studied. The effect of fiberglass molding process (with glue or without it) on the components shear strength.

As a result of the conducted studies we found that:

1. The presence of intermediate layer allows increase shear strength of a AB-T1 + (PN70U30 + EP741) +BK50 + VPS fiberglass composite compound up to 50%, and AB-T1 + (PN70U30 + EP741) + VPS composite up to 90%.

2. Implementation of plasma-sprayed intermediate layer allows increase fatigue strength of fiberglass aluminum alloy compounds up to ≈ 120%.

3. Implementation of plasma-sprayed intermediate layer ensures workability of hybrid composite materials under consideration at temperatures fr om – 60°C to +60°C. The temperature profile  repeats equidistantly the curve of basic technology, but at higher strength values.

The results of the study can be used for new composite materials development and hardening adhesive compounds of dissimilar materials. For example, to develop hybrid composites titanium fiberglass aluminum alloy, and new SIAL variants for fiberglass aircraft propeller blades design, compressor and turbine blades for gas-turbine engines.

Keywords:

glass-reinforced plastic-metal compound, plasma-sprayed coating, porous coating, adhesion coupling, composite material, hybrid composites, dissimilar materials compound hardening

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