Effect of strut diameter on compressive behaviour of selective laser sintered polyamide rhombic dodecahedron lattice. (2021)

• Record Type: Journal Article
• Authors: Prithvirajan, R.; Balakumar, C.; Arumaikkannu, G.
• Is Part Of: Materials today. Volume 46:Part 10(2021)
• Page Start: 4482
• Page End: 4486
• Publication Date: 2021
• Subjects: Additive Manufacturing -- Selective Laser Sintering -- Lattice Structure -- Rhombic dodecahedron; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2020.09.684
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: In this work, a lattice structure with the rhombic dodecahedron lattice fabricated with polyamide material through selective laser sintering (SLS) was investigated under quasi-static compression loading. Rhombic dodecahedron belongs to the group of platonic solids that can create monodisperse lattice structure. Though unit cell geometry and constituent material govern the property of the lattice, only the effect of strut diameter variations on the compressive behaviour of the lattice was focused in this study. The periodic lattice designed with different strut diameter were fabricated with SLS. Then fabricated lattices were subjected to a quasi-static compression test in which distinct regions of elastic, plateau and densification regions were observed. Plateau stress and linear modulus increases with increase in strut diameter, whereas densification strain exhibits inverse relation. The energy absorption capability of the lattice can be increased at the expense of densification strain. Rhombic dodecahedron lattice being a bend dominated shape exhibits an appreciable shape recovery after the removal of load.