Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1988-06-13
1989-10-24
Raevis, Robert R.
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
73850, G01N 320
Patent
active
048753769
ABSTRACT:
A self-contained apparatus for testing the ductility of a weld located within an elongated specimen having means for raising and lowering a ram over the specimen. The apparatus includes a pair of legs, each having a pair of spaced-apart rails for supporting a pair of spaced-apart rollers which define an opening. Each roller of a pair has a width sufficient for supporting the test specimen, and is connected to a corresponding rail pair to extend over the opening. An overarm is provided having a cylindrical bore for guiding a force-powering apparatus having a ram toward and away from the opening. A mandrel having a working surface is connected to the ram by an adapter. The mandrel is located with the working surface above but between the rollers. The specimen may be positioned on the rollers with the weld disposed between the rollers. The mandrel is forced downwardly by the ram, with the mandrel, contacting the specimen along the working surface to bend the specimen into the opening. The bending process exhibits the ductility of the weld as well as the presence of defects in the weld .
REFERENCES:
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patent: 4573360 (1986-03-01), Yoneda
patent: 4625563 (1986-12-01), Dawson et al.
patent: 4656872 (1987-04-01), Fischer
patent: 4677856 (1987-07-01), Fischer
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