Page 421 - IJB-9-6

International

Journal of Bioprinting

RESEARCH ARTICLE
Lightweight load-bearing heat dissipation

multifunctional pomelo peel-inspired structures
fabricated by laser powder bed fusion

Linxuan Li, Dongdong Gu*, He Liu, Han Zhang, Junhao Shan, and Yijuan Zhang

Jiangsu Provincial Engineering Laboratory for Laser Additive Manufacturing of High-Performance
Metallic Components, College of Materials Science and Technology, Nanjing University of
Aeronautics and Astronautics, Nanjing 210016, China
This article belongs to the Special Issue: 3D Bioprinting for Materials and Application)

Abstract

The heat dissipation structure used in modern airborne radar chassis not only requires
lightweight, but also pursues better mechanical properties and heat dissipation
performance. In this study, a stochastically porous pomelo peel-inspired gradient
structure was fabricated by laser powder bed fusion using Al-Mg-Sc-Zr powder.
This study focused on the formability, microstructure, mechanical properties, and
heat dissipation performance of the biomimetic structure through experimental
and finite element analysis approaches. The influence of volume fraction (VF)
on structural mechanical properties, deformation modes, stress distribution,
and heat dissipation performance was investigated. The results showed that the
mechanical properties of the structure declined as the VFs decreased. The optimal
mechanical performance was obtained at the VF of 45%, where the compressive
strength, specific energy absorption (W ), and specific compressive strength values
s
-3
*Corresponding author: were measured to be 63.47 MPa, 34.84 J/g, and 142.16 MPa/(g·cm ), respectively.
Dongdong Gu Moreover, the W of the structures was higher than that of the reported aluminum
(dongdonggu@nuaa.edu.cn) s
alloy structures at the same VF. The biomimetic structure exhibited improved heat
Citation: Li L, Gu D, Liu H, et al., dissipation performance as the VFs decreased, with Reynolds number ranging from
2023, Lightweight load-bearing heat 2700 to 13,400. The structure of 30% VF with a remarkable heat transfer efficiency
dissipation multifunctional pomelo
peel-inspired structures fabricated index of 1.86 displayed the best heat dissipation performance. In addition, compared
by laser powder bed fusion. Int J with the traditional fin structures, the bionic structure possessed better thermal
Bioprint, 9(6): 1011. resistance, heat transfer efficiency index, and temperature uniformity at the same
https://doi.org/10.36922/ijb.1011
VF. This study demonstrated notable potential of pomelo peel-inspired design for
Received: May 29, 2023 lightweight load-bearing applications capable of heat-dissipating performance,
Accepted: July 31, 2023
Published Online: August 30, 2023 providing a novel perspective for design and fabrication of versatile structures in the
aviation field.
Copyright: © 2023 Author(s).
This is an Open Access article
distributed under the terms of the Keywords: Multifunctional biomimetic structure; Laser powder bed fusion;
Creative Commons Attribution
License, permitting distribution, Mechanical properties; Heat dissipation performance
and reproduction in any medium,
provided the original work is
properly cited.
Publisher’s Note: AccScience 1. Introduction
Publishing remains neutral with
regard to jurisdictional claims in Biomimetic design is currently a thriving field in structural engineering, which
published maps and institutional
affiliations. derives extraordinary design insights from the multifunctional and high-performance

Volume 9 Issue 6 (2023) 413 https://doi.org/10.36922/ijb.1011