Nondestructive Evaluation and Self-Monitoring Materials

By Williams, Ellen

Book Id: WPLBN0000019999
Format Type: PDF eBook:
File Size: 2.05 MB
Reproduction Date: 2008

Title:	Nondestructive Evaluation and Self-Monitoring Materials
Author:	Williams, Ellen
Volume:
Language:	English
Subject:	Government publications, Legislation., Government Printing Office (U.S.)
Collections:	Government Library Collection
Historic Publication Date:
Publisher:	Government Printing Office


Citation APA MLA Chicago Williams, B. E. (n.d.). Nondestructive Evaluation and Self-Monitoring Materials. Retrieved from http://gutenberg.cc/

Excerpt
Excerpt: Briefers and Advisors: We are grateful to the individuals who briefed us on various topics in nondestructive evaluation and to others who we consulted for advice and additional information. Their materials and discussions have made this study possible.

Table of Contents
Contents 1 INTRODUCTION 1 2 BACKGROUND 3 3 OVERARCHING STRATEGY FOR NDE 7 3.1 Point-by-point Screening . . . . . . . . . . . . . . . . . . . . . 8 3.1.1 Parallel optical scanning . . . . . . . . . . . . . . . . . 9 3.1.2 Registration beacons: repeatable ultrasonic scanning and change detection . . . . . . . . . . . . . . . . . . . 10 3.1.3 Defect-sensitive coatings . . . . . . . . . . . . . . . . . 13 3.2 Broad Area Search Methods . . . . . . . . . . . . . . . . . . . 15 3.2.1 Radar . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 3.2.2 Optical holography . . . . . . . . . . . . . . . . . . . . 16 3.2.3 Optical speckle holography/TV holography . . . . . . . 17 3.2.4 Multi-band thermal infrared spectrometry . . . . . . . 18 3.3 Temporal Measurements . . . . . . . . . . . . . . . . . . . . . 19 3.3.1 Acoustic spectral resonance analysis for structural flaws 20 3.3.2 Acoustic emissions . . . . . . . . . . . . . . . . . . . . 23 4 MULTI-VARIATE ANALYSIS AND FAILURE PREDICATION 27 4.1 Linear Models and Fault Tolerance . . . . . . . . . . . . . . . 28 4.2 Non-Linear Systems . . . . . . . . . . . . . . . . . . . . . . . . 34 4.2.1 Nonlinear system health monitoring . . . . . . . . . . . 35 4.2.2 MI1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 4.2.3 Synchronization of system and model . . . . . . . . . . 39 4.2.4 A statistic for drift of the system from the model . . . 40