Abstract
Cellular lattice structures have important applications in aerospace, automobile and defense industries due to their high specific strength, modulus and energy absorption. Additive manufacturing provides the design freedom to fabricate complex cellular structures. This study investigates the compressive properties and deformation behavior of a Ti-6Al-4V unit Kagome structure fabricated by selective laser melting. Further, the mechanical performance of multi-unit and multi-layer Kagome structure of acrylonitrile butadiene styrene (ABS) ABS-M30™ manufactured by fused deposition modeling is explored. The effect of a number of layers of Kagome structure on the compressive properties is investigated. This paper also explores the mechanical properties of functionally graded and uniform density Kagome structure. The stiffness of the structure decreased with the increase in the number of layers whereas no change in peak load was observed. The functionally graded Kagome structure provided 35% more energy absorption than the uniform density structure.
Highlights
Cellular lattice structures have major applications in the aerospace, automobile and defense industries due to their high specific strength, stiffness and energy absorption capacity
The fused deposition modeling (FDM) cannot fabricate the structure with a low diameter, the Kagome structure was designed with a 13 mm core height, 2.62 mm strut diameter and 3 mm face sheets thickness
The mechanical properties of the cellular lattice structures depend on the relative density and architecture
Summary
Cellular lattice structures have major applications in the aerospace, automobile and defense industries due to their high specific strength, stiffness and energy absorption capacity. The mechanical performance of the lattice structures depends on the architecture and the parent material. Conventional manufacturing methods of open lattice structures include investment casting, deformation forming and wire woven textile [1]. The effectiveness of producing complex design is limited in conventional methods. Additive manufacturing (AM) is a new state of art which provides design freedom in the fabrication of the lattice structures. With various AM processes, these structures can be fabricated with a wide range of materials and various polymers for ferrous and non-ferrous metal alloys
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