NASA NTRS · 19790000381
Crack-opening displacement transducer
Abstract
Crack-opening displacement transducer consists of 30 deg cone, coil spring, and linear-displacement transducer. Conical probe is used to measure crack opening. Cone is pressed firmly into crack by spring. As applied load causes crack to open up, cone is pushed further into it. Movement of cone, and thus crack growth, is monitored by linear-displacement transducer. Method gives more accurate measurement of crack-opening displacement of very narrow slots.
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Simonds, R. A.. 1980-04-01. Crack-opening displacement transducer. https://ntrs.nasa.gov/citations/19790000381
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