Generalisation of Lattice Structure Application in Compression

Tan, Jing Wai (2020) Generalisation of Lattice Structure Application in Compression. Final Year Project (Bachelor), Tunku Abdul Rahman University College.

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Abstract

In this research paper, compressive properties of lattice structure was analysed by using FEA simulation and experimental compression test. Netfabb and Solidowrks were used as the CAD tool to design lattice structure. Besides, Ansys was used as the FEA tool to analyse compressive properties of lattice structure. There were ten lattice topologies selected and designed in the analysis. Selection of lattice topology was made by comparing the known lattice structure from different research papers through theory support. The ten designed lattice structure were 2 types of formation from tetrahedron lattice structure, octet truss lattice structure, 3 types of length ratio for 3D reentrant honeycomb structure, 3 dimensional (3D) modified arrowhead reentrant structure and 3 angle orientation of S-Shaped lattice structure. The ten lattice topologies are most suitable to be categorized by using compressive strength, stiffness and elasticity. There are 8 lattice topology that can excel in their respective categorized group. Second formation of tetrahedron lattice structure and 3D modified arrowhead reentrant structure were found to be the least encouraged lattice structure among the 10 lattice topology due to their low energy absorption per mass during compression and low young modulus of structure. The selection of the lattice topology in different application have to be balanced in between functionality and cost. The Poisson’s ratio of lattice topologies also calculated to enhance the analysis of lattice structure with different topologies while being compressed. Besides that, experimental compression test also conducted for all the ten lattice topologies to ensure the accuracy of simulation in real application. Lastly, the stress distribution within the struts of lattice structure is the most important factors that affect compressive properties of lattice structure and it can be altered by using different number of struts and struts’ angle.