Lab 3 history

The contact&dynamic testing methods lab was established in 1993. The founder and first head of the laboratory (from 1993 to 2014) was Doctor of Technical Sciences, Professor Rudnitsky Valery Arkadevich. The initiator of the separation of the laboratory into a separate structure was Academician P.P. Prokhorenko, who noted the great potential of V.A. Rudnitsky scientific topics in the field of control of materials by indentation methods. Since 2014, the laboratory is headed by Doctor of Technical Sciences Kren A.P.

Scientific research in the laboratory is carried out in the following main areas:

creation of the scientific foundations of the mechanics of contact interaction and the rheological behavior of materials during dynamic deformation by a rigid spherical indenter of elastoplastic (metals, concrete), viscoelastic (rubber, low-modulus polymers) and carbon-carbon composite materials.

thickness measurement of heat-resistant nickel coatings using the magnetic ponderomotive method in the range of 2-800 microns, and two-layer (nickel-chromium) coatings deposited on a non-magnetic base.

determination of the properties of materials under static and dynamic loading by indentation parameters in the stages of elastic and full plasticity; study of deformation modes at various degrees of hardening and various elasto-plastic parameters of the material under study; study of the characteristics of the ratio of hardness and contact stresses depending on the nature of loading and material properties; determination of the rheological characteristics of metals from a contact interaction diagram; development of verification techniques for dynamic and static indentation equipment.

research on a scientifically sound choice of the geometric and magnetic parameters of the magnetizing devices of the transducers to ensure detuning from the influence of the main interfering factors in determining the thickness of nickel coatings: surface roughness, mechanical stresses, curvature of the controlled surface and edge effect.

development of methods for determining the thickness of the chrome coating in two-layer nickel-chromium coatings, taking into account information about the thickness and properties of the nickel coating, and without a priori information about the parameters of the nickel coating.