Ultrasonic studies of fly ash/polyurea composites

Jing Qiao; Alireza V. Amirkhizi; Sia Nemat-Nasser; Gaohui Wu

doi:10.1117/12.2012020

3 April 2013 Ultrasonic studies of fly ash/polyurea composites

Jing Qiao, Alireza V. Amirkhizi, Sia Nemat-Nasser, Gaohui Wu

Proceedings Volume 8689, Behavior and Mechanics of Multifunctional Materials and Composites 2013; 86891C (2013) https://doi.org/10.1117/12.2012020
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2013, San Diego, California, United States

Abstract

Due to its excellent thermo-mechanical properties, polyurea is attracting more and more attention in blast-mitigating applications. In order to enhance its capability of blast-induced stress-wave management, we seek to develop polyurea-based composites in this work. Fly ash which consists of hollow particles with porous shell and low apparent density was chosen as filler and a series of fly ash/polyurea composites with various fly ash volume fractions were fabricated. The dynamic mechanical behavior of the composites was determined by a personal computer (PC) based ultrasonic system in the 0.5-2MHz frequency range between -60°C to 30°C temperatures. Velocity and attenuation of both longitudinal and shear ultrasonic waves were measured. The complex longitudinal and shear moduli were then computed from these measurements. Combining these results provided an estimate of the complex bulk and Young’s moduli of the fly ash/polyurea composites at high frequencies. These results will be presented and compared with those of pure polyurea elastomer.

Citation Download Citation

Jing Qiao, Alireza V. Amirkhizi, Sia Nemat-Nasser, and Gaohui Wu "Ultrasonic studies of fly ash/polyurea composites", Proc. SPIE 8689, Behavior and Mechanics of Multifunctional Materials and Composites 2013, 86891C (3 April 2013); https://doi.org/10.1117/12.2012020

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available