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research-article

A Tree-Shaped Support Structure for Additive Manufacturing Generated by Using A Hybrid of Particle Swarm Optimization and Greedy Algorithm

[+] Author and Article Information
Lin Zhu

School of Mechanical Engineering, Shanghai Jiao Tong University No. 800, Dongchuan Road, Minhang Shanghai, 200240 China zhulin0728@sjtu.edu.cn

Ruiliang Feng

800 Dongchuan RD. Minhang District, Shanghai, China Shanghai, 200240 China fengruiliang@sjtu.edu.cn

Xianda Li

School of Mechanical Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Road, Shanghai, Shanghai 200240 China sbnine@sjtu.edu.cn

Juntong Xi

F12,Haoran Hi-Tech Building,1954 Hua Shan Road Shanghai, 200030 China jtxi@sjtu.edu.cn

Xiangzhi Wei

Rm A 709, School of Mechanical Engineering, Shanghai Jiao Tong University 800 Dongchuan Road Shanghai, Shanghai 200240 China antonwei@sjtu.edu.cn

1Corresponding author.

Manuscript received November 11, 2018; final manuscript received March 20, 2019; published online xx xx, xxxx. Assoc. Editor: Yong Chen.

ASME doi:10.1115/1.4043530 History: Received November 11, 2018; Accepted March 26, 2019

Abstract

Reducing the volume of support structures is a critical approach in saving materials and budgets of Additive Manufacturing, and tree structure is an effective design for this purpose. Although a few literatures and commercial software have been devoted to developing tree-supports, those tree-supports are generated based on geometry optimization or user-defined parameters, which cannot guarantee a minimum volume with the physical constraints. To address this issue, we propose a set of formulas for stably growing the tree-supports with physical constraints based on 3D printing experiments using FDM machines, and a volume minimization mechanism using a hybrid of particle swarm optimization (PSO) method with geometric constraints and a greedy algorithm. We show that this combination is effective in reducing the volume of tree-supports and the simulations show that the curves of volumes are monotonically descent to a constant after within a short time, and our experimental results show that the models with support structures can be manufactured stably.

Copyright © 2019 by ASME
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