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填充值参数对3D打印面板声学和物理力学性能的影响。

Influence of the Fill Value Parameters on Acoustic and Physical-Mechanical Performance of 3D-Printed Panels.

作者信息

Pop Mihai Alin, Coșniță Mihaela, Zaharia Sebastian-Marian, Chicoș Lucia Antoaneta, Croitoru Cătălin, Roată Ionuț Claudiu, Cătană Dorin

机构信息

Department of Materials Science, Transilvania University of Brasov, 500036 Brasov, Romania.

Department of Product Design, Mechatronics and Environment, Transilvania University of Brasov, 29 Eroilor Ave., 500036 Brasov, Romania.

出版信息

Polymers (Basel). 2025 Jun 28;17(13):1806. doi: 10.3390/polym17131806.

DOI:10.3390/polym17131806
PMID:40647816
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12251598/
Abstract

This study investigates the acoustic and mechanical performance of three types of 3D-printed polylactic acid (PLA) panels with varying infill densities (5-100%) and structural configurations. Using fused filament fabrication (FFF), panels were designed as follows: Type 1 (core infill only), Type 2 (core infill + 1.6 mm shell), and Type 3 (core infill + multi-layer shells). Acoustic testing via impedance tube revealed that Type 2 panels with a 65% infill density achieved the highest sound absorption coefficient (α = 0.99), while Type 1 panels exhibited superior sound transmission loss (TLn = 53.3 dB at 60% infill). Mechanical testing demonstrated that shell layers improved tensile and bending resistance by 25.7% and 36.9%, respectively, but reduced compressive strength by 23.6%. Microscopic analysis highlighted ductile failure in Type 2 and brittle fracture in Type 3. The optimal panel thickness for acoustic performance was identified as 4 mm, balancing material efficiency and sound absorption. These findings underscore the potential of tailored infill parameters in sustainable noise-control applications.

摘要

本研究调查了三种具有不同填充密度（5%-100%）和结构配置的3D打印聚乳酸（PLA）面板的声学和力学性能。使用熔融长丝制造（FFF）技术，面板设计如下：类型1（仅芯部填充）、类型2（芯部填充+1.6毫米外壳）和类型3（芯部填充+多层外壳）。通过阻抗管进行的声学测试表明，填充密度为65%的类型2面板实现了最高的吸声系数（α = 0.99），而类型1面板在填充率为60%时表现出卓越的传声损失（TLn = 53.3分贝）。力学测试表明，外壳层分别使拉伸强度和抗弯强度提高了25.7%和36.9%，但抗压强度降低了23.6%。微观分析突出了类型2中的韧性破坏和类型3中的脆性断裂。确定声学性能的最佳面板厚度为4毫米，以平衡材料效率和吸声性能。这些发现强调了定制填充参数在可持续噪声控制应用中的潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ed50/12251598/ab8dfa5be8f7/polymers-17-01806-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ed50/12251598/6384e485822f/polymers-17-01806-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ed50/12251598/965112146b0a/polymers-17-01806-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ed50/12251598/364d8533f2ef/polymers-17-01806-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ed50/12251598/3510b457c428/polymers-17-01806-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ed50/12251598/8be508a1f21d/polymers-17-01806-g010.jpg
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