Constant point of load application fracture specimen loading machine
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United States of America Patent
Stats
-
Apr 22, 1980
Grant Date -
N/A
app pub date -
Nov 9, 1978
filing date -
Nov 9, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A constant point of load application fracture specimen loading machine for applying a load between grips that engage opposite grip groove faces of a slotted specimen that preferably has as a remainder portion in that slot a 'V' shaped slot root whereby, when the machine grips are moved apart, they rotate so as to apply a constant point of load application to pull the specimen apart at that slot root. The machine of the present invention is useful for measuring the fracture toughness, fatigue-crack growth resistance, or stress corrosion crack growth resistance of slotted specimens providing a unique force application system whereby sliding friction losses are minimized, and other introduced effects, such as from specimen grip machining tolerances, or the like, are largely automatically compensated for.
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