Combinational design of heterogeneous lattices with hybrid region stiffness tuning for additive manufacturing

Yang, Nan; Song, Yifan; Huang, Jinlun; Chen, Yuetao; Maskery, Ian

Abstract

Lattices with engineered properties are significant for engineering applications in the energy, aerospace, optics and medical sectors. Current additive manufacturing (AM) combined with computer-aided design (CAD) methods are not flexible enough to create multi-substructure lattices with locally varying geometrical features and mechanical properties. For example, if the struts of one substructure correspond spatially to the void of another substructure in the hybrid region, the resulting structure is disconnected there. When the number of substructures is large, such a problem becomes inevitable and intractable. Here we propose a new AM & CAD method integrating all the processes of designing a complex lattice structure, such as subspace partitioning, substructure rotation, filling in each subspace and connection, and hybrid region stiffness tuning. This method provides a general framework for designing heterogeneous lattice structures with disorder, gradient and hybrid features. Additionally, we numerically and experimentally investigate the effectiveness of our hybrid region stiffness tuning method. Using this new method, the problem of low volume fraction or disconnection in the hybrid region in multi-substructure lattices is overcome, and the resulting structures can be generated for analysis or fabrication by any suitable AM technique.

Citation

Yang, N., Song, Y., Huang, J., Chen, Y., & Maskery, I. (2021). Combinational design of heterogeneous lattices with hybrid region stiffness tuning for additive manufacturing. Materials and Design, 209, Article 109955. https://doi.org/10.1016/j.matdes.2021.109955

• Journal Article Type: Article
• Acceptance Date: Jul 2, 2021
• Online Publication Date: Jul 5, 2021
• Publication Date: Nov 1, 2021
• Deposit Date: Feb 18, 2025
• Publicly Available Date: Feb 19, 2025
• Journal: Materials and Design
• Print ISSN: 0264-1275
• Electronic ISSN: 1873-4197
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 209
• Article Number: 109955
• DOI: https://doi.org/10.1016/j.matdes.2021.109955
• Keywords: Structural design, Combinational design, Mechanical property, Lattices, Additive manufacturing
• Public URL: https://nottingham-repository.worktribe.com/output/5792647
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0264127521005098?via%3Dihub
• Additional Information: This article is maintained by: Elsevier; Article Title: Combinational design of heterogeneous lattices with hybrid region stiffness tuning for additive manufacturing; Journal Title: Materials & Design; CrossRef DOI link to publisher maintained version: https://doi.org/10.1016/j.matdes.2021.109955; Content Type: article; Copyright: © 2021 The Author(s). Published by Elsevier Ltd.