@article{54c27f3c8f2a427fb4fddcb4c4d2746a,
title = "Design of graded lattice structure with optimized mesostructures for additive manufacturing",
abstract = "Additive manufacturing (AM) enables fabrication of multiscale cellular structures as a whole part, whose features can span several dimensional scales. Both the configurations and layout pattern of the cellular lattices have great impact on the overall performance of the lattice structure. In this paper, we propose a novel design method to optimize cellular lattice structures to be fabricated by AM. The method enables an optimized load-bearing solution through optimization of geometries of global structures and downscale mesostructures, as well as global distributions of spatially-varying graded mesostructures. A shape metamorphosis technology is incorporated to construct the graded mesostructures with essential interconnections. Experimental testing is undertaken to verify the superior stiffness properties of the optimized graded lattice structure compared to the baseline design with uniform mesostructures.",
keywords = "Additive manufacturing, Graded lattice, Lattice structure, Level set method, Topology optimization",
author = "Yiqiang Wang and Lei Zhang and Stephen Daynes and Hongying Zhang and Stefanie Feih and Wang, {Michael Yu}",
note = "Funding Information: The SIMTech authors, S. Feih and S. Daynes, acknowledge the support from the Agency for the Science Technology and Research and the Science and Engineering Research Council of Singapore through the Additive Manufacturing Centre Initiative (SERC Grant no. 142 68 00088). The authors acknowledge Mr. Lim Soon Cheong from the Department of Mechanical Engineering, National University of Singapore for manufacturing the testing fixtures, and SIMTech staff member Mr. Hengky Eng for 3D printing of the tested structures. Funding Information: The SIMTech authors, S. Feih and S. Daynes, acknowledge the support from the Agency for the Science Technology and Research and the Science and Engineering Research Council of Singapore through the Additive Manufacturing Centre Initiative (SERC Grant no. 142 68 00088 ). The authors acknowledge Mr. Lim Soon Cheong from the Department of Mechanical Engineering, National University of Singapore for manufacturing the testing fixtures, and SIMTech staff member Mr. Hengky Eng for 3D printing of the tested structures. Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",
year = "2018",
month = mar,
day = "15",
doi = "10.1016/j.matdes.2018.01.011",
language = "English",
volume = "142",
pages = "114--123",
journal = "Materials and Design",
issn = "0264-1275",
publisher = "Elsevier",
}