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Shakedown and ratchetting under tension-torsion loadings: analysis and experiments

  • Structural design analyses are conducted with the aim of verifying the exclusion of ratchetting. To this end it is important to make a clear distinction between the shakedown range and the ratchetting range. The performed experiment comprised a hollow tension specimen which was subjected to alternating axial forces, superimposed with constant moments. First, a series of uniaxial tests has been carried out in order to calibrate a bounded kinematic hardening rule. The load parameters have been selected on the basis of previous shakedown analyses with the PERMAS code using a kinematic hardening material model. It is shown that this shakedown analysis gives reasonable agreement between the experimental and the numerical results. A linear and a nonlinear kinematic hardening model of two-surface plasticity are compared in material shakedown analysis.

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Author:Manfred Staat
Document Type:Article
Year of Completion:2003
Publishing Institution:Fachhochschule Aachen
Date of the Publication (Server):2005/11/28
Tag:Einspielen; Ratchetting; Zug-Druck Belastung
ratchetting; shakedown; tension–torsion loading
GND Keyword:Einspielen <Werkstoff>
Source:Nuclear Engineering and Design 225 (2003), Seite 11–26 ; http://dx.doi.org/10.1016/S0029-5493(03)00134-1
Institutes:FH Aachen / Fachbereich Medizintechnik und Technomathematik
FH Aachen / IfB - Institut für Bioengineering
Dewey Decimal Classification:6 Technik, Medizin, angewandte Wissenschaften / 60 Technik / 600 Technik, Technologie