Deformation Behaviour Of Metallic Cellular Structure Using Finite Element Analysis
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Date
2022-08-10
Authors
Ahmad, Musa
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
The deformation of a metallic cellular structure (honeycomb) due to uniaxial
compression in x, y and z- directions is investigated in this study. The honeycomb
model is an engineering structure that is widely used nowadays. The material that was
used is Aluminium 7075.The honeycomb model is used as a structure by attaching it
with the panel or sandwich panel. Since honeycomb consists of porosity characteristic,
the force reaction and specific energy absorption is being focused in this project. The
specific energy absorption of the cellular structure is influenced by its porosity, pore
size and strain rate. The pore size differs due to the length of the honeycomb. In this
study, the cell wall thickness is varied from 0.25mm to 1.00mm. To change the porosity
size, the honeycomb model has two different lengths at 10mm and 15mm. The strain
rate will affect the force reaction and the SEA of the honeycomb. It is because the strain
rate will cause the change of modulus and the yield strength. As a result, the increasing
strain rate produce high force reaction against the deformation. The increase of cell
length (cell size) does decrease the SEA and the thicker thickness of the honeycomb
model (cell wall) does increase the SEA. However, some honeycomb models at higher
strain rate exhibits a different result.