Academic Journal
Development and Validation of a Thermomechanically Coupled Plasticity Model at Elevated Temperatures.
| Τίτλος: | Development and Validation of a Thermomechanically Coupled Plasticity Model at Elevated Temperatures. |
|---|---|
| Συγγραφείς: | Cetin, Safa Yusuf1 (AUTHOR) s.y.cetin@tugraz.at, Leitner, Martin1,2 (AUTHOR), Brunnhofer, Peter1,2 (AUTHOR) |
| Πηγή: | Advances in Materials Science & Engineering. 09/11/2026, Vol. 17 Issue 7, p1-17. 17p. |
| Θεματικοί όροι: | *Material plasticity, *Cast steel, *Bauschinger effect, *Thermomechanical properties of metals, *Cyclic loads, *High temperatures |
| Περίληψη: | Traditional material models often fail to accurately capture the cyclic behaviour of metals under combined thermomechanical loads, which leads to significant discrepancies in predicting material performance at elevated temperatures. This study develops and validates an advanced thermomechanically coupled plasticity model for G22NiMoCr5‐6 cast steel, implemented in Simcenter 3D, that accurately simulates the monotonic and cyclic behaviour at elevated temperatures. The proposed model integrates isotropic and kinematic hardening mechanisms, which employ the Ramberg–Osgood relation to describe monotonic stress–strain behaviour and the temperature‐dependent Chaboche model to capture cyclic plasticity. An extensive experimental programme was conducted between room temperature and 600°C to calibrate and validate the model. The results revealed significant temperature‐dependent effects, including changes in yield strength, hardening rates and fatigue life. The model effectively captured the initial cyclic softening observed at room temperature, the reduced hardening response at 200°C and 400°C, and the pronounced softening associated with a considerably reduced elastic modulus at 600°C. The main advantage of the proposed model lies in its ability to reproduce temperature‐dependent cyclic response with high quantitative accuracy while remaining directly applicable to finite element analyses of components subjected to complex thermomechanical loading. Quantitatively, monotonic stress–strain predictions deviated by less than 0.1% and the maximum discrepancy between experiment and simulation across the cyclic validation data was 7.31%. These results reveal that incorporating temperature‐dependent isotropic and kinematic hardening significantly improves predictive capability and applicability under elevated temperature cyclic loading. [ABSTRACT FROM AUTHOR] |
| Βάση Δεδομένων: | Academic Search Index |
καταχωρήστε σχόλιο πρώτοι!