Acousto-Elastic Fastener Preload Indicator
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Report Number: AFML TR 78-138
Author(s): Couchman, J. C.
Corporate Author(s): General Dynamics
Laboratory: Aeronautical Systems Division
Date of Publication: 1978-10
Pages: 101
Contract: F33615-76-C-5251
DoD Project: None Given
Identifier: ADB038409
Abstract:
This report describes the assembly, calibration, and testing of an acousto-elastic fastener preload indicator that has been demonstrated to preload fasteners with better than 5% accuracy within the elastic range. The system is computer automated and includes a calibration procedure for checking cutoff accuracy. The new capability afforded by this computer-controlled acousto- elastic torque wrench improves state-of-the-art capabilities by nearly an order of magnitude in accuracy for setting preloads and can be used on flaw-free fasteners of the flat-head type.
Author(s): Couchman, J. C.
Corporate Author(s): General Dynamics
Laboratory: Aeronautical Systems Division
Date of Publication: 1978-10
Pages: 101
Contract: F33615-76-C-5251
DoD Project: None Given
Identifier: ADB038409
Abstract:
This report describes the assembly, calibration, and testing of an acousto-elastic fastener preload indicator that has been demonstrated to preload fasteners with better than 5% accuracy within the elastic range. The system is computer automated and includes a calibration procedure for checking cutoff accuracy. The new capability afforded by this computer-controlled acousto- elastic torque wrench improves state-of-the-art capabilities by nearly an order of magnitude in accuracy for setting preloads and can be used on flaw-free fasteners of the flat-head type.