COMPRESSION BEHAVIOR OF DIGITAL LIGHT PROCESSING PRINTED SANDWICH PANEL CORES

Çava K., Uşun A., İpek H., Aslan M., Hacıalioğlu Ş.

Additive Manufacturing Conference, Antalya, Turkey, 28 - 30 April 2025, pp.118, (Summary Text)

  • Publication Type: Conference Paper / Summary Text
  • City: Antalya
  • Country: Turkey
  • Page Numbers: pp.118
  • Karadeniz Technical University Affiliated: Yes

Abstract

This study investigates the mechanical behavior of sandwich panel cores fabricated using Digital Light Processing (DLP) 3D printing technology. Honeycomb and auxetic (reentrant) core geometries were selected due to their exceptional strength-to-weight ratio and unique deformation properties. These structures have diverse applications in aerospace, automotive, and civil engineering industries, such as aircraft flooring, automotive crash absorbers, and protective equipment. The core geometries had relative densities of 30%, 40%, and 50%, and were fabricated using DLP Printer. Mechanical performance was evaluated through static compression tests using an Instron universal testing machine. The results demonstrated the significant influence of geometry and relative density on the stress-strain behavior and failure modes. Honeycomb and auxetic patterns showed superior load-bearing capacity, while showing enhanced energy absorption. This work highlights the potential of 3D-printed cellular cores in optimizing mechanical performance for engineering applications.