Parametric Study of different Fiber Parameters and their Influence on Acoustics and Vibration Behavior of Jute Fiber/Polyester resin Composites

ABSTRACT

Short natural fiber–based composites are becoming a viable alternative to short E-glass fiber–reinforced composites in a variety of applications, due to their better damping and sound absorption capabilities. Also, quasi-isotropic properties can be obtained with randomly oriented short natural fibers. However, identifying the optimum fiber length and weight content are important to obtain better mechanical properties. The effect of fiber parameters on acoustic and vibration properties of jute/polyester composites was investigated in this study. Compression molding was used to fabricate composite specimens with different fiber lengths (10, 15, 20, and 25 mm) and fiber loadings (5, 10, 15, and 20 wt%). Further, sound absorption and damping properties of composites were studied using the impedance tube method and a free vibration test in cantilever mode. The damping property increases with increasing fiber loading and decreases with increasing fiber length, according to the findings. The highest natural frequency was found with a fiber length of 5 mm and a fiber loading of 25%, but larger fibers resulted in improved sound absorption. The findings suggest that jute/polyester composites could be a more cost-effective, practical, and environmentally superior and therefore, an alternative to E-glass/polyester composites, particularly in damping-sensitive applications.

Graphical Abstract

摘要

由于其卓越的阻尼和吸声能力, 天然纤维基复合材料在各种应用中正成为玻璃纤维增强复合材料的可行替代品. 研究了纤维参数对黄麻/聚酯复合材料声学和振动性能的影响. 采用压缩模塑法制作具有不同纤维长度 (10、15、20和25mm) 和纤维负荷 (5、10、15和20 wt%) 的复合试样. 采用阻抗管法和悬臂模式下的自由振动试验对复合材料的吸声和阻尼性能进行了评估. 根据研究结果, 阻尼性能随纤维负载的增加而增加, 随纤维长度的增加而减少. 当纤维长度为5mm, 纤维负荷为25%时, 发现固有频率最高, 但较大的纤维可提高吸声性能. 研究结果表明, 黄麻/聚酯复合材料可能是玻璃纤维复合材料的更具成本效益、实用性和环境优越性的替代品, 尤其是在阻尼敏感应用中.

KEYWORDS:

• Vibration
• jute fiber
• acoustics
• Delany-Bazley model
• Garai Pombli model
• sound absorption coefficient

关键词:

• 振动
• 黄麻纤维
• 声学
• 模型
• 模型
• 吸声系数

Disclosure statement

No potential conflict of interest was reported by the author(s).