Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1986-10-09
1987-10-20
Chapman, John
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
73789, 73827, G01N 308, G01H 100
Patent
active
047005777
ABSTRACT:
A method for testing fiberglass sucker rods wherein the rod is pulled to a predetermined stress level while measuring the load, elongation and acoustic emissions. The load versus displacement is plotted in real time while the measured values are used to calculate the modulus of elasticity for various load ranges. From the measurements and calculated modulus of elasticity the quality of the rod can be determined.
REFERENCES:
patent: 3313147 (1967-04-01), Rebbeck
patent: 4317368 (1982-03-01), McElroy
patent: 4475404 (1984-10-01), Rutledge et al.
patent: 4480482 (1984-11-01), Henry et al.
Chapman John
Shell Oil Company
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