Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1996-10-30
1997-10-07
Biegel, Ronald L.
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
73786, G01B 1700
Patent
active
056750897
ABSTRACT:
A passive strain gauge of brittle carbon fibers are aligned along an elongated length and encapsulated in an epoxy matrix to emit acoustic emissions when under stress exerted along the length of the gauge. The gauge can be mounted onto and along a mounted direction upon a structure in line with the carbon fibers which retain a state indicating peak stress along the mounted direction. When removed from the structure, the gauge can be monitored during stress testing by applying an increasing load along the length to determine the amount of peak strain exerted upon the structure which is the strain when the gauge begins to emit acoustic emissions. The strain gauge is well suited for mounting to bridges and buildings which are likely to be subjected to stress events such as an earthquakes for determining the amount of stress exerted upon the structure during the stress inducing event.
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Biegel Ronald L.
Reid Derrick Michael
The Aerospace Corporation
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