Summary
The Odqvist theory is generalized by employing a plastic prestrain-induced anisotropy tensor of rank four, which is a linear combination of fourth rank tensors formed by the isotropic tensor δ ij and the prestrain effect tensor e( p ij .
The constitutive equation is verified by uniaxial creep experiments carried out on thin-walled tubular specimens of pure copper deformed previously at room temperature under combined tension and torsion stresses.
Übersicht
Die von Odqvist aufgestellte Theorie wird durch die Verwendung eines Tensors vierter Stufe, der die Anisotropie infolge plastischer Verformung beschreibt, verallgemeinert. Der benutzte Tensor stellt eine Linearkombination von Tensoren vierter Stufe dar, die aus dem isotropen Tensor δ ij und dem Vorverformungstensor e( p ij gebildet werden.
Das Stoffgesetz wird an einachsigen Kriechversuchen mit dünnwandigen Rohrproben aus reinem Kupfer überprüft, die zuvor bei Raumtemperatur durch eine kombinierte Zug- und Torsionsspannung verformt worden sind.
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The author wishes to dedicate this paper to the memory of Prof. A. Sawczuk
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Waniewski, M. A simple law of steady-state creep for material with anistropy introduced by plastic prestraining. Ing. arch 55, 368–375 (1985). https://doi.org/10.1007/BF00532573
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DOI: https://doi.org/10.1007/BF00532573