Optimization and modeling of the sound absorption behavior of polyurethane composite foams reinforced with kenaf fiber

红麻 聚氨酯 材料科学 复合数 复合材料 响应面法 纤维 降噪系数 吸收(声学) 数学 统计 多孔性
作者
Seyed Ehsan Samaei,Umberto Berardi,Hassan Asilian Mahabadi,Parham Soltani,Ebrahim Taban
出处
期刊:Applied Acoustics [Elsevier BV]
卷期号:202: 109176-109176 被引量:22
标识
DOI:10.1016/j.apacoust.2022.109176
摘要

In this study, hybrid composites made of polyurethane (PU) matrix and natural kenaf fiber filler were designed and fabricated. The Response Surface Methodology (RSM) optimization approach coupled with a Central Composite Design (CCD) was used to design the experiments and optimize the parameters affecting the acoustic performance of the samples in the low and mid-frequency ranges. The acoustic performance of the samples was investigated using the impedance tube method. Additionally, the acoustic performance was predicted using a developed Quadratic model as well as the Delany-Bazley (DB) and Johnson-Champoux-Allard (JCA) models. The results showed that the acoustic absorption of neat PU foam is remarkably improved at all frequencies with the addition of kenaf fibers as the filler. It was found that the acoustic performance of the composite samples is optimal when the added amount of kenaf fibers to the polymer matrix and fiber length are 1.2 wt% and 8 mm, respectively. The sound absorption average (SAA) of the optimized composite and neat PU foam was calculated as 0.65 and 0.48, respectively i.e., an increase of 35.4 %. The Quadratic model showed very high accuracy for the prediction of the SAA of the optimized sample. The JCA model provided higher accuracy for the prediction of the frequency-dependent sound absorption coefficient of the composites as compared with the DB model.
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