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Information × Registration Number 0308U007710, 0106U005865 , R & D reports Title Micromechanics of the thin films on a combined layered elastic base - experimental methods of superthin films indentation and theoretical calculus popup.stage_title Дослідження ефекту підвищення сили контактного стиску в порівнянні з границею міцності матеріалу при одновісному деформуванні. Розробка числових методів моделювання процесу індентування Head Meleshko Vyacheslav V., Registration Date 30-12-2008 Organization Taras Shevchenko Kiev university popup.description2 Developing mathematical models of indentation with the cone, pyramidal, or wedge-shaped indenters, one collides with significant difficulties in the evaluation of singularities of stresses and displacements distribution nearby the mutual vertex of contacting solids. Characterization of the singularity has been carried out and several cases of finite force of contact pressure have been determined in the vicinity of vortex with the comparison given to the ultimate stress limit and value of loading force. By means of 3D statement of the boundary valued problem of potential theory the singularity of field in the vicinity of tri-plane conductive spatial corner is determined in the backgroung of mathematical model of pyramidal indenter. The core module of productive numerical algorithm for the realization of express methods of experimental tests has been developed and compared with experimental data. Calculations of the stress state have been performed by the finite elements method. Experimental tests of thefour aluminum alloy samples have been performed with the spherical and pyramidal indenters. Surface displaycement profiles have been obtained and micro-hardness characterization by Vikkers and Brinel has made.5635 Product Description popup.authors popup.nrat_date 2020-04-02 Close