Der Unterschied zwischen Zug- und Druckfließkurve, gedeutet durch den hydrostatischen Druckeinfluß

Herbertz, Rainer; Wiegels, Herbert

doi:10.1002/srin.198004865

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Cited by 8 publications

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Methods of determining Stress‐Strain Curves by upsetting cylindrical test‐pieces

Pöhlandt

Nester

1982

Materialwissenschaft Werkst

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The upsetting test is mainly used for determining stress‐strain curves in the range of high strains. Three modifications of the upsetting test are described: upsetting conventional lubricated specimens, upsetting Rastegaev specimens with end recesses, and upsetting under sticking friction conditions. Each of these procedures offers special advantages. For example, in the Rastegaev test, the specimen remains cylindrical up to a high strain while the work required for friction cannot be neglected. By upsetting under sticking friction conditions, no work is required for friction, but the specimen's shape deviates strongly from that one of a cylinder (barrelling). Proposals are made concerning unified procedures for carrying out the tests.

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