NUMERICAL SIMULATION OF THE INFLUENCE OF THE PUNCH SUPPORT SURFACE SIZE OF A SIX-PUNCH HIGH-PRESSURE CUBIC APPARATUS ON THE LEVEL OF ACHIEVABLE PRESSURE AND LIMIT STATE OF THE PUNCHES

  • Sergiy Polotnyak ІНМ ім.Бакуля НАНУ
  • Oleksandr Lyeshchuk Department of physico-mechanical research and nanotesting of materials, V. M. Bakul Institute for Superhard Materials National Academy of Sciences of Ukraine
  • Valentyn Lysakovskyi Department of single crystals of superhard materials, V. M. Bakul Institute for Superhard Materials National Academy of Sciences of Ukraine
  • Sergii Ivakhnenko Department of single crystals of superhard materials, V. M. Bakul Institute for Superhard Materials National Academy of Sciences of Ukraine
Keywords: high pressure apparatus, computer modeling, pressure, stress-strain state.

Abstract

The aim of the work is to determine the influence of the support surface size of the punches on the level of the generated pressure in the six-punch cubic apparatus and the limit state of the punches. Computer modeling using the finite element method of compression of a pyrophyllite container between punches with a different diameter of the supporting surface has been carried out, and the stress-strain and limit states of the container and punches in the process of deformation have been investigated. It is shown that the support surface size has practically no effect on the pressure distribution generated in the container. Decreasing in the size leads to increasing in the magnitude of equivalent stresses in the region on the axis of symmetry above the flat section of the working surface. Therefore, it is impractical to significantly reduce the size of the support surface of the punches.

Published
2023-08-23
Issue
Vol 25 No 1 (2022): Tooling marerials science
Section
Instrumental, structural and functional materials based on diamond and cubic bor