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Constitutive model calibration for railway wheel steel through tension–torsion tests
- Source :
-
Computers & Structures . May2005, Vol. 83 Issue 12/13, p1005-1020. 16p. - Publication Year :
- 2005
-
Abstract
- Abstract: The identification of the parameters contained in an elastic–plastic material model, apt to simulate steady-state ratchetting, is studied herein with reference to cyclic biaxial tests on cylindrical compact specimens. The material considered is steel employed for high-speed train wheels. In order to generate strain states close to those expected in severe service conditions due to wheel-rail rolling-sliding contact, out-of-phase tension–torsion unsymmetric cycles are applied in laboratory tests. The experiments are simulated by conventional finite elements and Chaboche model with nonlinear kinematic hardening. The material parameters are identified through a deterministic, batch (non-sequential) inverse analysis in two stages (genetic and first-order algorithms) in view of the peculiar constraints in the minimization problem. This study leads to the following conclusions of practical use: multiaxial ratchetting tests are desirable to characterize cyclic material behavior in the industrial context considered; compact (instead of thin-walled tubular) specimen tests, combined with parameter identification by inverse analysis, exhibit the advantages of cost effectiveness and of small size needed to assess material properties locally. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00457949
- Volume :
- 83
- Issue :
- 12/13
- Database :
- Academic Search Index
- Journal :
- Computers & Structures
- Publication Type :
- Academic Journal
- Accession number :
- 17514617
- Full Text :
- https://doi.org/10.1016/j.compstruc.2004.10.006