CFD and strength analysis of novel biomimetic lattice structure designed for additive manufacturing and post-processing

Saurav Verma; Ajeet Kumar; Shang-Chih Lin; Jeng-Ywan Jeng

Materials & Design (Dec 2022)

CFD and strength analysis of novel biomimetic lattice structure designed for additive manufacturing and post-processing

Saurav Verma,
Ajeet Kumar,
Shang-Chih Lin,
Jeng-Ywan Jeng

Affiliations

Saurav Verma: High Speed 3D Printing Research Center, National Taiwan University of Science and Technology, No. 43, Sec. 4, Keelung Rd, Taipei 106, Taiwan, ROC
Ajeet Kumar: Department of Design, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
Shang-Chih Lin: High Speed 3D Printing Research Center, National Taiwan University of Science and Technology, No. 43, Sec. 4, Keelung Rd, Taipei 106, Taiwan, ROC; Graduate Institute of Biomedical Engineering, National Taiwan University of Science and Technology, No. 43, Sec. 4, Keelung Rd, Taipei 106, Taiwan, ROC
Jeng-Ywan Jeng: High Speed 3D Printing Research Center, National Taiwan University of Science and Technology, No. 43, Sec. 4, Keelung Rd, Taipei 106, Taiwan, ROC; Academy of Innovative Semiconductor and Sustainable Manufacturing, National Cheng Kung University, No. 1, Dasyue Rd, Tainan City 701, Taiwan, ROC; Corresponding author at: High Speed 3D Printing Research Center, National Taiwan University of Science and Technology, No. 43, Sec. 4, Keelung Rd, Taipei 106, Taiwan, ROC.

Journal volume & issue: Vol. 224
p. 111375

Abstract

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The laborious work of post-processing powder removal from lattice structures made by polymer powder-based additive manufacturing (AM) process is still a major challenge and requires in-depth study. Here, a novel 3D honeycomb shaped lattice structure with ventilated holes bio-inspired from polyhedral plant cells has been designed to eliminate powder entrapment in constricted inter-cellular regions of surface-based lattice structure. The ventilation enables cross flow of powder within the lattice structure, resulting in easy and complete removal of entrapped powder. The computational fluid dynamics (CFD) method was used to understand the flow paths in various surface based lattice structures. An experimental setup was also designed to calculate the powder flowability from these lattices. The Finite Element Analysis (FEA) method and compression tests of various lattice structures were done to benchmark the strength of newly designed lattice structure. This innovative lattice structure can be used in biomedical, heat-exchanger, food and drug delivery systems and light-weighting applications.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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