Quasi-static perforation of the ceramic foam core sandwich panels impregnated with Newtonian and non-Newtonian fluids

TL;DR

This study experimentally investigates the mechanical response and energy absorption of ceramic foam sandwich panels filled with Newtonian and non-Newtonian fluids under quasi-static loads, highlighting the effects of boundary conditions and face-sheet thickness.

Contribution

It provides new insights into how non-Newtonian fluids enhance energy absorption and damage resistance in ceramic foam sandwich panels under static indentation.

Findings

STF filled panels absorb more energy than glycerol or neat composites.

Damage area is larger in neat composites and STF panels compared to glycerol-filled panels.

Boundary conditions significantly influence the mechanical response of the panels.

Abstract

In this research, Mechanical response and energy absorption of ceramic foam sandwich panels filled with Newtonian and non-Newtonian fluid subjected to quasi-static indentation loads were investigated experimentally. In addition, the effects of number of face-sheet layers (face-sheet thickness) and boundary conditions on the mechanical response and energy absorption of sandwich panels were discussed. Sandwich panels consisted of two glass/epoxy face-sheets with different thicknesses (4 and 8 layers) and an open cell ceramic foam core. This foam saturated with Newtonian (Glycerol) and non-Newtonian (mixture of Ethylene glycol and Aerosil) fluids. Sandwich panels were tested in two different kinds of supporting conditions, simply-supported and fully fixed (clamped). Results showed that damage area in neat composite and STF filled sandwich panels are much higher than the glycerol filled foam core sandwich panels. Also, STF saturated sandwich panels absorbed higher energy compared with two other type of sandwich panels during quasi-static punch shear test.