Document Type : Research Paper

Authors

• Jafar Eskandari ¹
• Amir sohil Pirayeshfar ²
• Mohammad mehdi Jalili ³
• Sayed yahya Mosavi ⁴
• Mehran Rohnia ⁵

¹ Associated Professor, composite center and Islamic Azad University- Science and Research Branch, Tehran

² B.Sc.,Department of Polymer Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran

³ Assistant professor, Department of Polymer Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran

⁴ B.Sc., Composite center and Islamic Azad University- Science and Research Branch, Engineering and Technical Faculty

⁵ Associated Professor, Islamic Azad University- Karaj Branch, Karaj

Abstract

In this study, three composites (Carbon fiber- Polyester resin, Glass fiber-Polyester resin and Hemp fiber-Polyester resin) are designed as a substitute for the wood in music instruments and their acoustic properties such as elastic modulus, acoustic coefficient, and acoustic coefficient efficiency are investigated. For better evaluation of the results, two wood specimens from Cupressus arizonica and Morus Alba trees (which are using in many acoustic applications) were chosen and analyzed as control samples. The results show that the resultant composites possess essential acoustic and vibrational properties so that the result for Carbon fiber-Polyester composite exhibits tremendous acoustic properties than wood samples did. In this paper, the water absorption of resultant composites and wood samples were also measured. The results demonstrate that composites specimens could resist against humidity much better than wood samples.
 

Keywords

• Carbon fiber
• Glass fiber
• Hemp fiber
• polyester resin
• Acoustic properties
• Cupressus arizonica and Morus alba tree woods
• water absorption

Main Subjects

• Composite wood products
• Physics and Mechanical Wood