The Flexural Rigidity Sensor: Applications in Non-Destructive Testing.

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Abstract:

The Frank J. Seiler Research Laboratory has developed a flexural rigidity sensor FRS that now makes it possible to measure dynamic flexural deformations of structures in the presence of large linear vibrations. Measurements of this type can be used to provide a spectral signature of a rigid member under varying loading conditions. Changes in the loading or flexural stiffness of the member can be readily identified by characteristic shifts in these spectral signatures. Using these methods, impending structural failures may be identified using the FRS. This compact device is completely portable and has a resolution of 10 to the minus 9th power radian with a flat response from dc to 50 kHz. It offers a wide and intriguing range of applications in non-destructive testing of civil engineering and aerospace structures. Author

Author(s):
Okubo, Shigeo ; Monaco, Sal
Author Organization(s):
FRANK J SEILER RESEARCH LAB UNITED STATES AIR FORCE ACADEMY COLO
Descriptive Note:
Interim rept.,
Pagination:
0027

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
FJSRL-TR-75-0017
Task Number(s):
790402
Project Number(s):
AF-7904
 Subject Terms
Communities of Interest:
Sensors
Descriptor(s):
*Nondestructive testing, *Flexural strength, *Rigidity, *Structural members, Light emitting diodes, Detectors, Stiffness, Vibration, Deformation, Loads(Forces), Moments, Failure, Portable equipment
Field(s)/Group(s):
Test Facilities, Equipment and Methods, Mechanics
Keyword(s):
Optical pickoff
Report Date:
1975 Oct 01