27 - Experimental and numerical evaluation of mechanical properties of hybrid lattice structures manufactured by selective laser melting
Abstract
Recently, lattice structures with lightweight, excellent energy absorption, high specific stiffness and specific strength [1] were widely considered for industrial applications such as automobile [2], aerospace [3] and medical implants [4]. Additive manufacturing (AM) technology improvements have allowed to fabricate complex and small lattice structure. The study is focused on the investigation of feasibility and effectiveness of additive manufacturing metal hybrid lattice structure with high stiffness and energy absorption. Three kinds of 316L stainless steel hybrid lattice structures with 7×7×7 unit cells were additively manufactured by selective laser melting. The hybrid samples combine the bending-dominated F3BCC and stretch-dominated octet-truss lattice structures through cell alternation, layer alternation, and around alternation methods. Quasi-static compression tests with digital imaging correlation (DIC) technique for displacement fields measurement were conducted on hybrid lattice samples. The stiffness, energy absorption and deformation mode among different hybrid lattices structures were investigated and compared. Furthermore, Finite Element Analysis based on previously studied elastic-plastic constitutive model was carried out to simulate mechanical behaviors of the hybrid lattice structures under compressive conditions. Finally, the results of the numerical simulations were compared to the mechanical tests in terms of force-displacement curves, displacement and deformation fields. This final comparison of the experimental and numerical results should verify the accuracy of the numerical model and allow an ad’hoc optimization procedure.
Speaker
Zhaozhen Huang
Discover speaker profileUniv. Savoie Mont Blanc, SYMME, Annecy, France
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27 - Experimental and numerical evaluation of mechanical properties of hybrid lattice structures manufactured by selective laser melting
Date/Time
21/03/2024
5:05 pm -5:25 pm
Location
Room 7