Published: Jan 1976
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This paper considers shape changes which develop progressively in hourglass specimens subjected to fully reversed cyclic plastic strain applied in a variety of mechanical and thermal waveforms. While the strain at the minimum diameter is controlled, off-center locations subjected to cyclic plastic strain undergo ratcheting. Two major off-center shape changes have been observed: barreling and necking. The paper discusses the reasons for these changes.
thermal fatigue, strains, necking
Mechanical engineer and Coolidge Fellow, Corporate Research and Development, General Electric Co., Schenectady, N.Y.
Paper ID: STP27894S