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Acoustic Emission in Structural Health Monitoring and Surface Engineering

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Surface Sciences and Technology".

Deadline for manuscript submissions: closed (20 April 2022) | Viewed by 2370

Special Issue Editor


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Guest Editor
College of Textile, Donghua University, Shanghai 201620, China
Interests: Textile materials

Special Issue Information

Dear Colleagues,

Acoustic properties of fibrous materials and fiber reinforced composites have been studied extensively for the purpose of sound insulation and absorption, as well as structural health monitoring. Nevertheless, little has been reported about their acoustic emission properties. Due to environmental concerns, wood harvesting is more and more restrictively regulated around the world. Therefore, much effort has been made to develop alternative materials, especially fiber reinforced composites, to replace wood for musical instruments for which acoustic emission properties are critically important. Therefore, designing a scientifically sound, easy-to-use and highly repeatable method for acoustic vibration tests of composites for percussion musical instruments could be critically important for material evaluation, selection and improvement.The acoustic vibration test may be used as a nondestructive test method for estimate flexural modulus of a material with a linear regression model.

Prof. Dr. Yiping Qiu
Guest Editor

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Keywords

  • Test method
  • Composite
  • Acoustic properties
  • Mechanical properties
  • Percussion instrument
  • Vegetable fiber

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Published Papers (1 paper)

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Research

10 pages, 2381 KiB  
Article
A Test Method for Acoustic Emission Properties of Natural Cellulose Fiber-Reinforced Composites
by Fanxizi Liu, Qiang Gao, Hui Guo, Chenhong Lang, Jinhua Jiang and Yiping Qiu
Appl. Sci. 2021, 11(24), 12067; https://doi.org/10.3390/app112412067 - 17 Dec 2021
Cited by 1 | Viewed by 2069
Abstract
To test the acoustic performance of fiber-reinforced composites for replacing wood, an acoustic vibration test method is developed. For evaluation of the test method, composites are manufactured using hemp and ramie embedded in epoxy, through vacuum-assisted resin infusion molding. The effects of the [...] Read more.
To test the acoustic performance of fiber-reinforced composites for replacing wood, an acoustic vibration test method is developed. For evaluation of the test method, composites are manufactured using hemp and ramie embedded in epoxy, through vacuum-assisted resin infusion molding. The effects of the most important factors, i.e., impulse, relative humidity (RH), and specimen thickness, on the acoustic vibration response of the composites are systematically studied. The magnitudes of the impulses, represented by different masses of the dropping balls, seem to have little influence on the shapes of the acoustic vibration curves, although the intensity of the spectra increases as the impulse increases. The RH influences the spectrum shape significantly due to variation in the Young’s modulus and density of the material upon absorption of moisture. The specimen thickness also greatly affects the testing results. The specific dynamic modulus, acoustic radiation damping coefficient, and acoustic impedance change a little as the impulse magnitude and RH change, but decrease substantially as the specimen thickness increases. The specific dynamic modulus can be linearly correlated with the flexural modulus of a material. Full article
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