Enhancement of ultrasonic non-destructive evaluation technique for high attentuation composite materials

Hsiao Chun Wu, Nikhil Gupta, Phani S. Mylavarapu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Syntactic foams are hollow particle filled composite materials. The quality assessment and defect detection in polymeric syntactic foams through ultrasonic imaging (UI) poses severe challenges. Two main difficulties in using UI for syntactic foams are identified as (a) presence of numerous interfaces causing internal reflections and increasing the noise level and (b) presence of significant amount of air causing high attenuation. The present paper takes the first step towards obtaining meaningful scans through UI. Solid particle filled composites have been fabricated and their ultrasonic signature response is analyzed. A totally blind novel signal processing non-destructive evaluation technique is introduced to automatically detect ridges in the ultrasonic response signature of the specimen. The results show that the new algorithm developed in this work is successful in detecting ridges at unequal intervals having a difference of over two orders of magnitude in the amplitudes. The detected ridges can be used to estimate the transmission and attenuation coefficients of the sample.

Original languageEnglish (US)
Title of host publication20th Technical Conference of the American Society for Composites 2005
Pages12-24
Number of pages13
StatePublished - 2005
Event20th Technical Conference of the American Society for Composites 2005 - Philadelphia, PA, United States
Duration: Sep 7 2005Sep 9 2005

Publication series

Name20th Technical Conference of the American Society for Composites 2005
Volume1

Other

Other20th Technical Conference of the American Society for Composites 2005
CountryUnited States
CityPhiladelphia, PA
Period9/7/059/9/05

ASJC Scopus subject areas

  • Ceramics and Composites

Fingerprint Dive into the research topics of 'Enhancement of ultrasonic non-destructive evaluation technique for high attentuation composite materials'. Together they form a unique fingerprint.

  • Cite this

    Wu, H. C., Gupta, N., & Mylavarapu, P. S. (2005). Enhancement of ultrasonic non-destructive evaluation technique for high attentuation composite materials. In 20th Technical Conference of the American Society for Composites 2005 (pp. 12-24). (20th Technical Conference of the American Society for Composites 2005; Vol. 1).