Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1987-10-02
1988-10-18
Myracle, Jerry W.
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
G01N 332
Patent
active
047778296
ABSTRACT:
A piezoelectric load cycle counter is provided for a multi-stationed strain-life tester. A plurality of test specimens are interposed between a fixed upper bracket and a lower reciprocating bracket and are cyclically flexed therebetween. Piezoelectric crystals maintained in association with the upper bracket with each of the test stations present an output signal on each flexure of the test specimen. These output signals enable a counter which counts the number of cycles of the lower bracket. When a specimen breaks, the output signal of the associated station terminates and the count for that station similarly terminates.
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Myracle Jerry W.
Ruf Ernst H.
The Firestone Tire & Rubber & Company
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