Mechanical performance of composite sandwich core structure fabricated by FDM printing technique

Azman, Farid Ikram (2024) Mechanical performance of composite sandwich core structure fabricated by FDM printing technique. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Honeycomb core sandwich structure (HCSS) is common strcuture that been used in many sectors especially aerospace. Most of the material that been used for honeycomb sandwich structure is non-biodegradable.The increasing environmental concerns over plastic waste calls for more sustainable alternatives in product design. This study aim is to address this issue by fabricate and designing honeycomb core sandwich structure (HCSS) using natural fibre materials and 3D printing method. The design is refer by past research. 3 typical design of honeycomb sandwich structure which is regular hexagon, triangular hexagon and double hexagon was choosen as the concept with the most relevant interest. The design then will be test the printability by using FDM printing technique with bio-composite filament. The specimens of the HCSS will be test the mechanical testing for sandwich structure which include tensile test, flexural test and flatwise tensile test.. The test will be will determine the mechanical properties of the material and sandwich structure in tensile, flexural and compressive. Result from the mechanical testing will be analyze to determine the ideal shape of the honeycomb core sandwich structure (HCSS). Overall, in terms of tensile and flexural, double hexagon show the superiority compared to regular hexagon and triangular hexagon pattern. However, in flatwise tensile, triangular hexagon pattern results is slightly higher compared to double hexagon. This is because of lack of samples on flatwise tensile. Overall, the reinforced ribs and additional hexagon core on double hexagon proved it can be stronger than regular hexagon. Eventho double hexagon pattern have better strength, it also consume more materials and almost double the weight.

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