Accession Number : ADA017768

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

Descriptive Note : Interim rept.,

Corporate Author : FRANK J SEILER RESEARCH LAB UNITED STATES AIR FORCE ACADEMY COLO

Personal Author(s) : Okubo,Shigeo ; Monaco,Sal

Report Date : OCT 1975

Pagination or Media Count : 27

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)

Descriptors :   *Nondestructive testing, *Flexural strength, *Rigidity, *Structural members, Light emitting diodes, Detectors, Stiffness, Vibration, Deformation, Loads(Forces), Moments, Failure, Portable equipment

Subject Categories : Test Facilities, Equipment and Methods
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE