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Stukhlyak P.D.,Kharkiv Polytechnic Institute | Buketov A.V.,Kherson State Maritime Academy | Panin S.V.,Tomsk Polytechnic University | Maruschak P.O.,Kharkiv Polytechnic Institute | And 5 more authors.
Physical Mesomechanics | Year: 2015

Shock fracture mechanisms of different scales were investigated on epoxy composite materials reinforced with silicon carbide microparticles of different concentrations. It is shown that the high heterogeneity of the epoxy composites at different structural scales is one of the factors responsible for their physical and mechanical properties. Under dynamic loading, the material reveals a developed structural scale hierarchy which provides self-consistent deformation and fracture of the material bulk with the lead of rotational deformation modes. As a result, microcracks develop due to low shear strain limited in addition by reinforcing particles. At the start of a main crack, microscale mechanisms dominate, whereas the propagation of its front is governed by macroscale fracture mechanisms. © 2015, Pleiades Publishing, Ltd. Source


Buketov A.V.,Kherson State Maritime Academy | Skyrdenko V.O.,Kherson State Maritime Academy
Materials Science | Year: 2015

We optimize the composition of adhesive and functional surface layers for the formation of two-layer coatings with improved adhesive, physicomechanical, and thermal properties. It is shown that, for the formation of an adhesive layer, it is reasonable to add particles of a carbide mixture in the following amounts: q = 15–20 wt.% per q = 100 wt.% of the epoxy oligomer. At the same time, for the formation of the surface layer of the coating, it is necessary to use q = 40–50 wt.% of iron minium as a filler. © 2015, Springer Science+Business Media New York. Source


Buketov A.V.,Kherson State Maritime Academy | Krasnen'Kyi V.M.,Kherson State Maritime Academy
Materials Science | Year: 2013

We study the influence of the contents and physical nature of coarse-grained (60-65 μm) and finegrained (3-10 μm) particles on the adhesion strength and residual stresses in epoxy composites for functionally gradient coatings. The temperature-and-time conditions of cross-linking of the epoxy matrix are optimized. The maximum adhesion strength (49.2-50.0 MPa) is attained as a result of the addition of copper-oxide filler (60-65 μm) to the epoxy oligomer in the following amounts: q = 60-80 m.p. per 100 m.p. of the epoxy matrix. The residual stresses vary from 4.5 to 4.8 MPa. © 2013 Springer Science+Business Media New York. Source


Buketov A.V.,Kherson State Maritime Academy | Sapronov O.O.,Kherson State Maritime Academy | Brailo M.V.,Kherson State Maritime Academy | Aleksenko V.L.,Kherson State Maritime Academy
Materials Science | Year: 2014

We study he influence of the optimal mode of ultrasonic treatment on the physicomechanical and thermal characteristics of nanocomposites. The maximum values of these characteristics were recorded in the case of introducing of a nanodispersed sintered composite (filler) in the epoxy binder in the amounts of 0.05 m.p. of the filler per 100 m.p. of the epoxy oligomer. In this case, the adhesive shear strength σ τ = 15.0 MPa, the elasticity modulus E = 3.7 GPa, the fracture stress in bending σ u = 100 MPa, and the heat-resistance temperature (by Martens) T = 342°K. © 2014 Springer Science+Business Media New York. Source

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