Optimization of Relative Density to Geometric Parameter Ratio for Honeycomb Structure Using Finite Element Method
Octarina Adiati Juniasih (a*), Kushendarsyah Saptaji (a), Tedi Kurniawan (c)

a) Faculty of Engineering and Technology, Sampoerna University
b) Community College of Qatar

Abstract

Honeycomb structures are becoming preferred choice for increasing the efficiency of automotive, aerospace, construction and other related industries as it provides low-density ratio to specific strength. Out-of-plane orientation honeycomb core structure has significant advantage in load-bearings and energy absorption. However, previous studies were mostly focusing on the specific strength of the structure. In this paper, optimization of relative density to geometric parameter ratio for honeycomb structure is conducted with the focus on compressive properties. It is expected that high compressive properties with low relative density can be achieved. Relative density and geometric parameter are obtained from RVE (Representative Volume Element) which affected by variable-thickness. Finite Element Method (FEM) using ANSYS software were conducted to simulate compression test with 300kN compressive load to the honeycomb structure with various ratios. FEM results illustrate that relatively higher geometric parameter tends to have higher compressive properties. Structure with the lowest ratio of relative density to geometric parameter of around 22.70% has higher equivalent elastic strain and equivalent stress around 0.50896 and 1.7152 GPa compared to other parameters. In order to validate the FEM result, the honeycomb structure was fabricated using 3D printer with PLA filament and subsequently tested under compression test.

Keywords: Honeycomb Structure, Lightweight Material, Finite Element Method, 3D Printing

Topic: Mechanical Engineering