The evaluation of non-stochastic lattice structure on drop test application

Samin, Nor Syamilah (2014) The evaluation of non-stochastic lattice structure on drop test application. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

This project is intended to create design and analysis of non-stochastic lattice cellular structure on the drop test application. The objective of this study is to design three types of non-stochastic cellular structures for drop test application, to identify the mechanical properties of different cell structures for drop test application and to determine the suitable structural arrangement of the cell structure in impact energy absorbers. This project will focus primarily on the design and analysis of three types of non-stochastic cellular structures which are rhombic dodecahedral, hexagonal and octahedral. The outcome of this study in terms of drop test application and the most suitable cell structure that can withstand the drop test analysis that the product being drop at certain height in normal gravity. This project started by generating a design concept in CAD Software. The finite element analysis which is drop test analysis using SOLIDWORKS are the analysis that be chosen to analyze the toughness of the three types of cell structures. The parameter had been set up to implement in the analysis of the three types of non-stochastic cellular structures. The honeycomb structure has been divided into three different dimensions which are 1 mm pore size, 3 mm pore size and also 5 mm pore size. Based on the findings, both materials; Aluminium 3003-H18 and hybrid material shows that hybrid material (combination of EPS Foam and Aluminium honeycomb) has toughness structure when it undergo the drop test analysis in Solidworks. Furthermore, the octahedral 3 mm pore size using hybrid material is the safe structure to implement in the inner liner of the helmet after factor of safety was calculated. This is because, the structure pass the factor of safety after undergoing the drop test analysis.

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