A comprehensive creep material model for evaluation of high temperature applications of ferritic, martensitic and austenitic steels is available in API 579-1/ASME FFS and in ASME VIII Div 2 CC-2605-1 codes based on MPC Project Omega. Although the model can be used directly to analyze pressure vessels components behavior in a non-linear finite element creep analysis, several numerical and theoretical limits are to be taken into account in the implementation of the FE user-subroutine of the material model. In this context, a deep parametric analysis, both theoretical and numerical, based on different possible operating conditions and material behavior (temperature, pressure, stress field, elastic-plastic material properties and plastic flow rules) has been performed to review the model results on a high pressure vessel component. Based on results of these analyses, a theoretical critical review of the method is presented.
Vivio, F., Gaetani, L., Ferracci, M., Masia, A. (2013). DETAIL INVESTIGATION OF OMEGA METHOD FOR CREEP ANALYSIS OF PRESSURE VESSEL COMPONENTS. In ASME 2013 Pressure Vessels and Piping Conference Volume 3: Design and Analysis (pp. --). ASME [10.1115/PVP2013-97470].
DETAIL INVESTIGATION OF OMEGA METHOD FOR CREEP ANALYSIS OF PRESSURE VESSEL COMPONENTS
VIVIO, FRANCESCO;
2013-01-01
Abstract
A comprehensive creep material model for evaluation of high temperature applications of ferritic, martensitic and austenitic steels is available in API 579-1/ASME FFS and in ASME VIII Div 2 CC-2605-1 codes based on MPC Project Omega. Although the model can be used directly to analyze pressure vessels components behavior in a non-linear finite element creep analysis, several numerical and theoretical limits are to be taken into account in the implementation of the FE user-subroutine of the material model. In this context, a deep parametric analysis, both theoretical and numerical, based on different possible operating conditions and material behavior (temperature, pressure, stress field, elastic-plastic material properties and plastic flow rules) has been performed to review the model results on a high pressure vessel component. Based on results of these analyses, a theoretical critical review of the method is presented.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
