Nondestructive Inspection (NDI) of Reduced Strength Bonds

Chance, Richard

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Nondestructive Inspection (NDI) of Reduced Strength Bonds

1994-02-01
By Chance, Richard

File Language:

English

Details

Creators:

Chance, Richard
Corporate Creators:

Grumman Corporation
Corporate Publisher:

United States. Department of Transportation. Federal Aviation Administration. William J. Hughes Technical Center
Corporate Contributors:

United States. Department of Transportation. Federal Aviation Administration. Technical Center
Subject/TRT Terms:
Publication/ Report Number:

DOT/FAA/CT-93/42
Resource Type:

Tech Report
Geographical Coverage:

United States
Edition:

Final Report
Description:

The goal of this project was to develop a nondestructive inspection technique capable of detecting weak adhesive bonds. The approach was to fabricate contaminated surface-induced weak bond specimens which were then used to evaluate candidate techniques and to further optimize the selected most promising technique. The results indicate the ultrasonic resonance technique showed some success in detecting weak bonds as determined through destructive test correlations conducted using the representative weak bond specimens. The technique was 97 percent effective in detecting known weak bonds but was subject to false reject error ranging between 14 and 31 percent depending upon the evaluation criteria employed. Difficulties were encountered with the destructive test correlations due to the wide variation of results experienced with the flatwise tension tests that were conducted. The ultrasonic resonance technique and a recently emerged ultrasonic feature analysis/adaptive learning technique looked promising but will require further evaluation involving test specimens with large weak bond areas representing several weak bond mechanisms in addition to contaminated interfaces.
Format:

PDF
Funding:

DTFA03-88-C-00016
Download URL:

https://rosap.ntl.bts.gov/view/dot/93438/dot_93438_DS1.pdf
File Type:

[PDF - 776.28 KB]
Collection(s):

FAA William J. Hughes Technical Center for Advanced Aerospace
Main Document Checksum:

urn:sha-512:83e902f1c539ea91358a4533caeb720f67778a211d537db0a52fe9827bbbff61b9edf6bc1dbaac9aaab3660c28ced525b607c4a224eab649959a054952a66f9c

File Language:

English

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