Publication: Finite element analysis for deformation of polymer cellular structure.
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Date
2022-07-24
Authors
Anuar, Muhamad Aniq
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Abstract
Cellular material can be defined as a material with complex internal topologies. A high void content ranging from 50% to 90% is suitable for use as impact protective materials due to their lightweight and ability to absorb a significant amount of impact energy with a relatively low and consistent impact force on the protected item. This project's primary objective is to simulate the behaviour of a polymer cellular structure. The hexagonal honeycomb will have nine samples that will be created by using SOLIDWORKS with different dimensions in terms of length and thickness. The honeycomb sample will have a length of 10mm, 15mm, or 21mm and will have a thickness of 0.5mm, 1.0mm, or 1.5mm. The simulations that used finite element analysis (FEA) relied on the material parameters of Nylon 12 and PLA. The sandwich panel will have a different velocity and a different strain rate during the simulation. The plate of the sandwich panel will be set as rigid in the stiffness behaviour option to avoid any deformation happening to the plate that will affect the result of the simulation. The contact between the plate and the honeycomb has also been set up as frictionless to avoid any failure data during the simulation. The result show that the specific energy absorption of this study does not depend on the varied thickness and length since the results that were acquired from the Ansys reveal that the specific energy absorption does not have a trend in term of thickness and length. This also illustrates that the viscoelastic behaviour of the material being used is not reliant on the different characteristics of the samples.