Improving sound absorption through the filament stringing effect in 3D printed acoustic materials

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2025-06-23 DOI:10.1016/j.apacoust.2025.110892

Tomasz G. Zieliński , Marco D'Agostini , Andrew Gleadall , Rodolfo Venegas , Paolo Colombo , Giorgia Franchin

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引用次数: 0

Abstract

This work demonstrates how a well-known malfunction that frequently occurs in material extrusion technologies, known as filament stringing or oozing, can be used to increase the acoustic performance of 3D printed sound absorbing materials. The purpose is first achieved with conventional slicer software by deliberately setting some printing parameters ‘wrong’ to provoke filament stringing. Acoustic materials based on the same original design of narrow slits are 3D printed with retraction enabled or disabled, or using a higher than required printing temperature. The uncontrolled filament stringing that occurs in this way creates fibres in the slits, which ultimately affects the sound absorption measured for these materials. This cannot be ignored in modelling if accurate sound absorption predictions are to be obtained. However, inspired by the uncontrolled stringing, we developed a new concept to print parts with deliberate parametrically adjustable micro-fibre substructures. These are achieved by directly designing innovative toolpaths with recently developed design software (FullControl GCODE Designer), which has never been used previously for sound absorption purposes. The method permits low-cost 3D printers to produce tailored complex acoustic materials with enhanced viscous dissipation effects and improved sound absorption properties. This behaviour is correctly captured by the proposed, experimentally verified, mathematical model of such acoustic composites. The examples presented in the article are also used to discuss some aspects of the reproducibility of acoustic materials 3D printed by extrusion.

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通过3D打印声学材料的长丝串效应提高吸声效果

这项工作展示了如何在材料挤压技术中经常发生的众所周知的故障，称为长丝串或渗出，可用于提高3D打印吸声材料的声学性能。目的首先是通过传统的切片机软件故意设置一些打印参数“错误”，以引起灯丝串。基于相同原始窄缝设计的声学材料可以3D打印，可以启用或禁用缩回，也可以使用高于要求的打印温度。以这种方式发生的不受控制的灯丝串在缝隙中产生纤维，最终影响这些材料的吸声测量。如果要获得准确的吸声预测，在建模时就不能忽略这一点。然而，受不受控制的弦的启发，我们开发了一种新的概念来打印带有故意参数可调微纤维子结构的部件。这些都是通过使用最近开发的设计软件（FullControl GCODE Designer）直接设计创新的工具路径来实现的，该软件以前从未用于吸声目的。该方法允许低成本3D打印机生产具有增强粘性耗散效果和改善吸声性能的定制复杂声学材料。这种行为被提出的、经过实验验证的这种声学复合材料的数学模型正确地捕捉到了。文章中提出的例子也用于讨论通过挤压3D打印声学材料的再现性的一些方面。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Applied Acoustics 物理-声学

CiteScore

7.40

自引率

11.80%

发文量

618

审稿时长

7.5 months

期刊介绍： Since its launch in 1968, Applied Acoustics has been publishing high quality research papers providing state-of-the-art coverage of research findings for engineers and scientists involved in applications of acoustics in the widest sense. Applied Acoustics looks not only at recent developments in the understanding of acoustics but also at ways of exploiting that understanding. The Journal aims to encourage the exchange of practical experience through publication and in so doing creates a fund of technological information that can be used for solving related problems. The presentation of information in graphical or tabular form is especially encouraged. If a report of a mathematical development is a necessary part of a paper it is important to ensure that it is there only as an integral part of a practical solution to a problem and is supported by data. Applied Acoustics encourages the exchange of practical experience in the following ways: • Complete Papers • Short Technical Notes • Review Articles; and thereby provides a wealth of technological information that can be used to solve related problems. Manuscripts that address all fields of applications of acoustics ranging from medicine and NDT to the environment and buildings are welcome.