Measuring and testing – Specimen stress or strain – or testing by stress or strain... – By loading of specimen
Patent
1988-06-30
1989-05-23
Myracle, Jerry W.
Measuring and testing
Specimen stress or strain, or testing by stress or strain...
By loading of specimen
G01N 308
Patent
active
048318825
ABSTRACT:
A self-supporting extensometer for use with rectilinear specimens has one arm that contacts a specimen edge on two points that are spaced apart in a longitudinal direction of the specimen, and a second arm which engages an opposite edge of the specimen at a single substantially point contact under a spring load urging the arms together. The specimen contact arms are notched to receive edges of the rectilinear specimen. The second specimen contact arm has single point contact and has a curved surface which engages a side edge of the specimen so that contact with the specimen is at a point. The support assembly includes a releasable hold-down or clamp spring that bears on the surface of the specimen opposite from the extensometer to clamp the extensometer in place. The spring loading of the extensometer arms and the hold-down spring supports the weight of the extensometer directly on the specimen.
REFERENCES:
patent: 2833045 (1958-05-01), Strimel
patent: 3319338 (1967-05-01), DeNicola
patent: 3789508 (1974-02-01), Meline
patent: 3940975 (1976-03-01), Meline
Product Specification of Model 632.18B Adjustable Diametral Extensometer, MTS Systems Corporation, 1975.
Meline Harry R.
Paulsen Eric L.
MTS Systems Corporation
Myracle Jerry W.
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