NDLI: Development of ir contrast data analysis application for characterizing delaminations in graphite-epoxy structures

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Development of ir contrast data analysis application for characterizing delaminations in graphite-epoxy structures

Content Provider	NASA Technical Reports Server (NTRS)
Author	Havican, Marie
Copyright Year	2012
Description	Objective: Develop infrared (IR) flash thermography application based on use of a calibration standard for inspecting graphite-epoxy laminated/honeycomb structures. Background: Graphite/Epoxy composites (laminated and honeycomb) are widely used on NASA programs. Composite materials are susceptible for impact damage that is not readily detected by visual inspection. IR inspection can provide required sensitivity to detect surface damage in composites during manufacturing and during service. IR contrast analysis can provide characterization of depth, size and gap thickness of impact damage. Benefits/Payoffs: The research provides an empirical method of calibrating the flash thermography response in nondestructive evaluation. A physical calibration standard with artificial flaws such as flat bottom holes with desired diameter and depth values in a desired material is used in calibration. The research devises several probability of detection (POD) analysis approaches to enable cost effective POD study to meet program requirements.
File Size	108651
Page Count	2
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20120016873
Archival Resource Key	ark:/13960/t07x1cn73
Language	English
Publisher Date	2012-01-01
Access Restriction	Open
Subject Keyword	Composite Materials Thickness Nondestructive Tests Cost Effectiveness Infrared Inspection Delaminating Graphite-epoxy Composites Honeycomb Structures Detection Impact Damage Thermography Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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