Effect of Rib-Based Internal Geometry on the Mechanical Performance of Hexagonal Cellular Structures Under Lateral Compression

Abdul Basir Khan A. R., Acar D.

3rd International Conference on Engineering, Natural Sciences, and Technological Developments (ICENSTED 2026) , Erzurum, Türkiye, 3 - 06 Temmuz 2026, ss.834, (Özet Bildiri)

  • Yayın Türü: Bildiri / Özet Bildiri
  • Basıldığı Şehir: Erzurum
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.834
  • Karadeniz Teknik Üniversitesi Adresli: Evet

Özet

Cellular structures, particularly honeycomb-based geometries, attract significant attention due to their high strength-to-weight ratio and energy absorption capabilities. Their mechanical performance depends not only on material properties but also on geometric configuration. In this study, hexagonal-based cellular structures with different rib-based internal structures are investigated to evaluate the effect of internal geometry on structural performance. All specimens are designed with identical external dimensions and wall thickness, ensuring that geometric configuration remains the only variable affecting performance. The samples are fabricated from generic polylactic acid (PLA) using fused deposition modelling (FDM). Experimental tests are carried out under lateral compression, where the load is applied perpendicular to the main axis of the cells. The results are compared in terms of load-bearing capacity, energy absorption, and deformation behaviour. Additionally, finite element analysis is conducted to simulate the mechanical response of each design. The numerical model used to predict stress distribution, deformation patterns, and failure behaviour. Constructed models are validated with experimental results. The combined experimental and numerical approach provides a comprehensive understanding of how internal rib-based geometries influence mechanical performance. The findings contribute to the design and optimization of lightweight cellular structures for engineering applications. 

Keywords: Honeycomb, Internal structure, Rib, Energy absorption, Finite element analysis (FEA)