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Nondestructive evaluation of elastom...

Huang, Hae-an.

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Nondestructive evaluation of elastomer matrix composites.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Nondestructive evaluation of elastomer matrix composites./
Author:	Huang, Hae-an.
Description:	175 p.
Notes:	Source: Dissertation Abstracts International, Volume: 54-07, Section: B, page: 3700.
Contained By:	Dissertation Abstracts International54-07B.
Subject:	Applied Mechanics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9334752

Nondestructive evaluation of elastomer matrix composites.
Huang, Hae-an.

Nondestructive evaluation of elastomer matrix composites. - 175 p.

Source: Dissertation Abstracts International, Volume: 54-07, Section: B, page: 3700.

Thesis (Ph.D.)--The Pennsylvania State University, 1993.

Investigations were conducted to develop nondestructive evaluation techniques suitable for elastomer matrix composites (EMCs). Two polyurethane-based matrix systems, PPDI (paraphenylene diisocyanate) and CHDI (cyclohexane diisocyanate) reinforced with S-glass fiber, were used in the study.Subjects--Topical Terms:

1018410
Applied Mechanics.

Nondestructive evaluation of elastomer matrix composites.
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008 130614s1993 eng d
035 $a (UnM)AAI9334752
035 $a AAI9334752
040 $a UnM $c UnM
100 1 $a Huang, Hae-an. $3 1926269
245 1 0 $a Nondestructive evaluation of elastomer matrix composites.
300 $a 175 p.
500 $a Source: Dissertation Abstracts International, Volume: 54-07, Section: B, page: 3700.
500 $a Co-Advisers: H. Thomas Hahn; Charles E. Bakis.
502 $a Thesis (Ph.D.)--The Pennsylvania State University, 1993.
520 $a Investigations were conducted to develop nondestructive evaluation techniques suitable for elastomer matrix composites (EMCs). Two polyurethane-based matrix systems, PPDI (paraphenylene diisocyanate) and CHDI (cyclohexane diisocyanate) reinforced with S-glass fiber, were used in the study.
520 $a The acoustic properties of EMCs, including the attenuation coefficient, echo transmittance, reflection coefficient, and phase velocity, were investigated. Predictions of wave attenuation, phase velocity and the expected waveforms of various material specifications were made using measured acoustic properties.
520 $a Ultrasonic C-scan, visual examination, x-ray radiography, and eddy current inspection were performed on specimens fabricated with simulated flaws. Among these methods, C-scan provided the most information although discernment of details was difficult because the image was degraded by the combined effect of signal distortion, signal overlap, and structural noise.
520 $a Transmitted signals based on signal reverberations between the flaw-EMC interfaces were used to extract the reflection coefficient of the interface and flaw thickness. Pulse-echo signals processed with a new time-domain deconvolution technique provided a superior capability for flaw characterization. The deconvolution method incorporated adaptive waveform prediction techniques which enable prediction of wave distortion in highly attenuating and dispersive composite media. For the intentional flaws studied, the recovered interface reflections greatly enhanced the capability to identify the type, depth, and thickness of flaws.
590 $a School code: 0176.
650 4 $a Applied Mechanics. $3 1018410
690 $a 0346
710 2 0 $a The Pennsylvania State University. $3 699896
773 0 $t Dissertation Abstracts International $g 54-07B.
790 1 0 $a Hahn, H. Thomas, $e advisor
790 1 0 $a Bakis, Charles E., $e advisor
790 $a 0176
791 $a Ph.D.
792 $a 1993
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9334752