Research progress on the development of validation methodology for multi-axial creep damage constitutive equations and its specific application to 0.5Cr0.5Mo0.25V ferritic steel at 590 °C is presented. A set of new phenomenological multi-axial creep damage constitutive equations was proposed aiming at overcoming the deficiency of inconsistency between predicted rupture strains and observed ones. Based on these explicit consistent requirements, an improved validation methodology is proposed and applied to 0.5Cr0.5Mo0.25V ferritic steel at 590 °C. It shows that the predictions of this new set of constitutive equations are consistent with experimental observations. It also reveals a significant difference in creep curves between different sets of constitutive equations and the need for experimental data so that the coupling of damage and creep deformation can be further examined.
|Number of pages||10|
|Journal||Nuclear Engineering and Design|
|Early online date||2 Dec 2003|
|Publication status||Published - 1 Mar 2004|
|Event||16th International Conference on Structural Mechanics in Reactor Technology - Washington, United States|
Duration: 12 Aug 2001 → 17 Aug 2001
Conference number: 16