NASA NTRS · 19940000570
System Measures Loads In Bolts
Abstract
Improved technique for ultrasonic nondestructive measurement of loads in bolts involves use of pulsed phase-locked loop interferometer. Provides for correction of errors and for automatic readout of loads in bolts. Actual bolt load measured, using transducers rebonded after bolts tightened. Calibration block and thermometer added. Technique applicable to critical fasteners in aerospace applications, nuclear reactors, petroleum and other chemical processing plants, steel bridges, and other structures.
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Allison, Sidney G.. 1994-10-01. System Measures Loads In Bolts. https://ntrs.nasa.gov/citations/19940000570
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