Investigation of Low-Velocity Impact Behaviors of Aluminum Foam Sandwich Structures Reinforced with Aluminum Plates


Jasim N., Güneş R.

VI. International Scientific and Vocational Studies Congress – Engineering, Kayseri, Turkey, 23 - 26 December 2021, pp.24

  • Publication Type: Conference Paper / Summary Text
  • City: Kayseri
  • Country: Turkey
  • Page Numbers: pp.24
  • Erciyes University Affiliated: Yes

Abstract

In this study, the low-velocity impact behavior of sandwich structures having aluminum foam core reinforced with aluminum plates was investigated. The effects of the Al-foam core density and the impact energy on the impact response of sandwich structures were investigated experimentally.

Sandwich plates were produced by combining of Al-foams with three different densities of 0.37, 0.52, and 0.70 g/cm3, placed between Al-6061-T6 reinforcement plates with epoxy adhesive. Low velocity impact tests were carried out for each sample at 15, 30, 45 and 60J impact energies.

The effects of the foam core density and the impact energy on the low-velocity impact behavior of the aluminum plate reinforced Al-foam core sandwich structures were examined in detail using contact force-time and energy-time graphics, and after impact permanent deformation photographs taken from the front and cross-section of the sandwich specimens.

The applied impact energies were absorbed by the sandwich plates in the form of plastic deformation. The energy absorption capability of Al-foam core sandwich plates supported by aluminum face sheets is quite high and can maintain this capability at different energy levels. For the 60J impact tests, the sandwich plate with a density of 0.37 g/cm3 was damaged, while the sandwich plates with a core density of 0.52 and 0.70 g/cm3 were not damaged. The absorbed energies by the sandwich plates with different Al-core densities exposed to the same impact energy are at almost the same levels. It was found that while the absorbed energies by the structures remain the same, they have different permanent deformations in their response to impact.