Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1989-05-03
1990-11-06
Myracle, Jerry W.
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
G01N 300
Patent
active
049676024
ABSTRACT:
A device, system, and method for measuring the strength of a sheet material during or after the manufacturing process are described. The present invention forms a chamber having one wall consisting of the sheet material to be tested. A high pressure air supply feeds into a reservoir which is in flow communication with the chamber by way of a valve. High pressure air is injected into the chamber, and the sheet ruptures. A pressure transducer measures the pressure in the chamber. The pressure measurements are differentiated, and a peck detector detects the peak derivative value obtained and thus the time at which the sheet ruptured. A computer determines the pressure in the chamber at the time that the sheet ruptured.
REFERENCES:
patent: 3160002 (1964-12-01), Lovette
patent: 4735092 (1988-04-01), Kenny
Measurex Corporation
Myracle Jerry W.
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