TY - GEN
T1 - Two-Scale Lightweight Optimization by Infilling Optimized Organic Truss-Based Lattice Material Based on the Principal Stress Trajectories
AU - Liu, Fuyuan
AU - Chen, Min
AU - Wang, Lizhe
AU - Xiang, Zhouyi
AU - Huang, Songhua
N1 - Publisher Copyright:
© The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.
PY - 2024
Y1 - 2024
N2 - The use of minimal material to generate high-stiffness structures is a key goal for reducing material waste and mitigating environmental corrosion in the context of additive manufacturing (AM). This paper proposes a two-scale lightweight optimization approach that infills organic truss-based lattice material within the topology optimization framework to improve structure stiffness. The proposed method utilizes the Subdivision Surface (Sub-D) modeling method to efficiently model organic lattice morphology on the mesoscale level, reducing stress concentration and improving material performance. On the macroscale, topology optimization is used to refine a structurally effective design frame. Guided by the principal stress field of the refined shape, the part of the design domain is tessellated into conformal subdomains where optimized material is smoothly connected and infilled for high stiffness. The proposed method maximizes material efficiency by populating anisotropic lattice materials in a quality morphology from topology optimization. Challenges such as the shortfall of uniform lattice material mapping, the limitation of only porous lattice material, and geometric constraints and stress concentration on lattice units are addressed, with a solid-lattice hybrid structure as an effective solution. The proposed method presents a viable solution for lightweight optimization in AM-based design.
AB - The use of minimal material to generate high-stiffness structures is a key goal for reducing material waste and mitigating environmental corrosion in the context of additive manufacturing (AM). This paper proposes a two-scale lightweight optimization approach that infills organic truss-based lattice material within the topology optimization framework to improve structure stiffness. The proposed method utilizes the Subdivision Surface (Sub-D) modeling method to efficiently model organic lattice morphology on the mesoscale level, reducing stress concentration and improving material performance. On the macroscale, topology optimization is used to refine a structurally effective design frame. Guided by the principal stress field of the refined shape, the part of the design domain is tessellated into conformal subdomains where optimized material is smoothly connected and infilled for high stiffness. The proposed method maximizes material efficiency by populating anisotropic lattice materials in a quality morphology from topology optimization. Challenges such as the shortfall of uniform lattice material mapping, the limitation of only porous lattice material, and geometric constraints and stress concentration on lattice units are addressed, with a solid-lattice hybrid structure as an effective solution. The proposed method presents a viable solution for lightweight optimization in AM-based design.
KW - Organic strut-based lattice design
KW - Principal stress driven
KW - Solid-lattice hybrid structure
UR - http://www.scopus.com/inward/record.url?scp=85189559683&partnerID=8YFLogxK
U2 - 10.1007/978-981-99-7965-3_61
DO - 10.1007/978-981-99-7965-3_61
M3 - Conference Proceeding
AN - SCOPUS:85189559683
SN - 9789819979646
T3 - Lecture Notes in Civil Engineering
SP - 705
EP - 716
BT - Towards a Carbon Neutral Future - The Proceedings of The 3rd International Conference on Sustainable Buildings and Structures
A2 - Papadikis, Konstantinos
A2 - Zhang, Cheng
A2 - Tang, Shu
A2 - Liu, Engui
A2 - Di Sarno, Luigi
PB - Springer Science and Business Media Deutschland GmbH
T2 - 3rd International Conference on Sustainable Buildings and Structures, ICSBS 2023
Y2 - 17 August 2023 through 20 August 2023
ER -