Evaluation of Damping Characteristics of 3D Printed CF-reinforced PLA/ABS Composite Sandwich Panels
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Abstract
This study aims to investigate the influence of carbon fiber (CF) as reinforcement on the vibration-damping behavior of sandwich composite panels made of Polylactic acid (PLA) and acrylonitrile butadiene styrene (ABS). The fabrication is done by 3D printing through Fused Deposition Modelling (FDM) technology. This study explores the application of 3D printing by FDM to develop composite sandwich panels for diverse purposes, investigating the use of commercially available polymers such as PLA and ABS, reinforced with carbon fiber. The finite element analysis is carried out for different combinations of core, and skins of fabricated sandwich panels, and modal tests are carried out in order to obtain the mode shapes and natural frequencies. It is found that the geometrical parameters of the core have an influence on the vibration damping of sandwich panels. The obtained results show that the sandwich panels with skins made of carbon fiber/PLA composites have around 14.84 percent higher damping properties as compared to pure PLA/ABS cores. The maximum deflection is higher for the core with thin wall thickness, and the maximum load is smaller for the horizontal core sandwich as compared to the vertical core. The results showed that so as to fabricate lightweight, high-strength, and low-cost sandwich panels the additive manufacturing technology using 3D printing can be used promisingly. It is found that the addition of CF considerably increased the energy absorption capacity as compared to pure PLA/ABS sandwich panels. In a nutshell, the fabrication of sandwich panels from the CF-reinforced PLA/ABS composites using 3D printing technology and its testing for damping properties is not explored to a greater extent.
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