Method for the determination of shrinkage effect

Details Method for the determination of shrinkage effect Method for the determination of shrinkage effect

1974-03-11

1976-03-02

Myracle, Jerry W.

Measuring and testing

Ductility or brittleness

G01N 312

Patent

active

039409732

ABSTRACT:
A method of determining the shrinkage effect to be intentionally produced the manufacturing process in the fabrication of high-pressure cylindrical vessels wherein test samples are cut from the cylindrical body and transducers are mounted upon the inner face thereof. The body is subjected to fluid pressure and a strain (.epsilon..sub.p) is determined on two test samples cut from the body while the strain intensity (.epsilon..sub.pa) at the apparent proportionality limit is determined via the transducers, by detecting the hoop strain (.epsilon..sub.ipa) at the apparent proportionality limit (.epsilon..sub.pa = .alpha..epsilon..sub.ipa where .alpha. is a proportionality factor depending upon the vessel shape). The shrinkage effect is related to the difference of .epsilon..sub.p and .epsilon..sub.pa.

REFERENCES:
patent: 3755658 (1973-08-01), Walters
patent: 3826902 (1974-07-01), Claxton et al.

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