Page 28 - MSAM-4-1

Materials Science in

Additive Manufacturing

ORIGINAL RESEARCH ARTICLE
Multicavity structures with triply periodic

minimal surface for broadband and perfect
sound absorption manufactured by laser

powder bed fusion

Mingkang Zhang 1 , Mingjian Deng 1 , Guanhao Wang 1 , Sihua Yin 1 ,
Wenbin Liu 1 , Chang Liu 1 , and Jie Chen *
2
1 Additive Manufacturing Laboratory, School of Mechanical and Energy Engineering, Guangdong
Ocean University, Yangjiang, Guangdong, China
2 Guangdong Key Laboratory of Modern Control Technology, Institute of Intelligent Manufacturing,
Guangdong Academy of Sciences, Guangzhou, Guangdong, China

Abstract

This research proposes a multicavity and a graded structure design method for
triply periodic minimal surface (TPMS) structures with broadband and perfect
sound absorption. TPMS structures were manufactured by laser powder bed
fusion. The sound absorption coefficient curves and acoustic band structure of
TPMS are analyzed using a two-microphone impedance tube. As the thickness
*Corresponding author: of TPMS structures increases, the noise reduction coefficient of TPMS structures
Jie Chen
(j.chen@giim.ac.cn) increases linearly, and the first resonance frequency shifts to the lower frequency.
The acoustic band structures indicate that the acoustic bandgap of TPMS structures
Citation: Zhang M, Deng M,
Wang G, et al. Multicavity structures shifts to a lower frequency with increasing thickness. Diamond has the highest noise
with triply periodic minimal surface reduction coefficient among these four types of TPMS. The TPMS with a multicavity
for broadband and perfect sound design has multiple resonance peaks. Notably, the five resonance peaks of the
absorption manufactured by laser
powder bed fusion. Mater Sci Add multicavity-I-Wrapped Package (IWP) are all above 0.94, achieving near-perfect
Manuf. 2024;4(1):5737. sound absorption over a wide frequency range. The semi-absorption bandwidth of
doi: 10.36922/msam.5737 the multicavity-TPMS structure has been widened, except for multicavity-diamond
Received: October 31, 2024 structures. Both uniform and multicavity TPMS present a subwavelength absorption
peak. The graded design method can broaden the semi-absorption bandwidth of
Revised: December 2, 2024
TPMS, and the combination of graded and multicavity designs can further enhance
Accepted: December 13, 2024 broadband and achieve perfect sound absorption.
Published Online: January 10,
2025
Keywords: Triply periodic minimal surface; Laser powder bed fusion; Acoustic
Copyright: © 2025 Author(s). metamaterials; Sound absorption; Broadband
This is an Open-Access article
distributed under the terms of the
Creative Commons Attribution
License, permitting distribution,
and reproduction in any medium, 1. Introduction
provided the original work is
properly cited. A 3D phononic crystal was designed based on a local resonance mechanism, which has
1
Publisher’s Note: AccScience subwavelength elastic wave/acoustic wave modulation characteristics. The wavelength
Publishing remains neutral with corresponding to the bandgap of the phononic crystal is much larger than the lattice
regard to jurisdictional claims in
published maps and institutional size, surpassing the limitations of the Bragg scattering mechanism and classifying it
affiliations. as an acoustic metamaterial. Acoustic metamaterial is an artificial structural material

Volume 4 Issue 1 (2025) 1 doi: 10.36922/msam.5737