Affiliation:
1. Materials Engineering Department, College of Engineering, Mustansiriyah University, Baghdad 10052, Iraq
Abstract
Acoustic energy dissipates in multi-phase or multi-boundary materials. Hybrid composites are described as multi-phase with many interfaces between their materials. The current research proposes the study of the acoustic behavior of polymeric hybrid composites by estimating the time, velocity, and hybrid composite acoustic impedance. Two groups of hybrid composites were prepared, including unsaturated polyester with PMMA, except one with HDPE and the other with PS. Each group had 28%, 35%, and 40% weight fractions. An ultrasonic test measured the time to determine the velocity and then the acoustic impedance later. The results showed that increasing the weight fraction will increase the density with respect to the density of the reinforcing material. Different ultrasonic times were obtained with increasing weight fractions. As the weight fraction of PS increased, the time increased; unlike the velocity, it decreased but increased with density. In contrast, this behavior was changed if the hybrid had PE. The highest acoustic impedance was at 28% UP/PMMA + PS. In conclusion, UP/PMMA + PS can dissipate ultrasonic waves more than UP/PMMA + PE.
Subject
Polymers and Plastics,General Chemistry
Reference28 articles.
1. Callister, W.D., and Rethwisch, D.G. (2003). Materials Science and Engineering: An Introduction, John Wiley & Sons, Inc.. [7th ed.].
2. Analysis and Performance of Fiber Composites;Agarwal;J. Appl. Mech.,1981
3. Prabhuram, T., Somurajan, V., and Prabhakaran, S. (2010, January 25–27). Hybrid composite materials. Proceedings of the Frontiers in Automobile and Mechanical Engineering, Chennai, India.
4. Frados, J. (1976). Plastics Engineering Handbook of the Society of the Plastics Industry, Inc., Van Nostrand Reinhold.
5. Hybrid fiber reinforced polymer composites—A review;Sathishkumar;J. Reinf. Plast. Compos.,2014