| Autor: |
V. Ganesan, B.K. Choudhary, J. Christopher, Vani Shankar, C. Praveen, G.V. Prasad Reddy |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
Procedia Structural Integrity. 14:798-805 |
| ISSN: |
2452-3216 |
| DOI: |
10.1016/j.prostr.2019.07.058 |
| Popis: |
An attempt has been made towards the implementation of two-internal-variable model based on the evolution of forest dislocation density and mean free path with the plastic strain into finite element code via user-defined material subroutine using implicit Euler backward algorithm with radial-return scheme. The rate independent two-internal-variable model considers isotropic hardening and the parameters associated with the model are optimised by fitting uniaxial true stress-true plastic strain data. Applicability of the implemented scheme has been examined by simulating the tensile behaviour of type 316LN austenitic stainless steel with different U-notch radii as 1.25, 2.5 and 5 mm at 300 K. Good agreement between the predicted and experimental data has been observed. Detailed analysis showed notch-strengthening effect increases with decrease in notch radius at 300 K. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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