EFFECTIVE ELASTIC PROPERTIES OF POROUS MATERIALS WITH INVERSE OPAL STRUCTURE

  • P. Korobko Інститут проблем матеріалознавства ім. І.М. Францевича НАН України
  • A. Kuzmov Національний технічний університет України «Київський політехнічний інститут імені Ігоря Сікорського», Інститут проблем матеріалознавства ім. І.М. Францевича НАН України
DOI: https://doi.org/10.36910/775.24153966.2024.77.7
Keywords: metamaterials, inverse opal, representative cell, elastic moduli, micromechanics

Abstract

Based on the theoretical principles of composite materials mechanics, the effective elastic behavior of a porous material with a periodic inverse opal structure was investigated by finite element modeling. The specific elastic energy was averaged on a representative cell of the inverse opal under different deformation schemes. This allowed us to find the effective shear modulus and bulk modulus for different cases of the inverse opal structure. It turned out that the effective elastic moduli are extremely sensitive to porosity. In particular, the application of an additional coating, even with a thickness less than 0.05 of the diameter of the spherical pores (the original polymer particles), causes an increase in the effective bulk modulus of elasticity by a factor of 4, and the shear modulus by a factor of 6.

Published
2024-07-01
Issue
No 77 (2024): Naukovi notatki
Section
Статті