Conference Publication Details
Mandatory Fields
Barrett, RA,O'Donoghue, PE,Leen, SB,Shim, DJ,Rudland, D
A UNIFIED VISCOPLASTIC MODEL FOR HIGH TEMPERATURE LOW CYCLE FATIGUE OF SERVICE-AGED P91 STEEL
PROCEEDINGS OF THE ASME PRESSURE VESSELS AND PIPING CONFERENCE - 2013, VOL 6B: MATERIALS AND FABRICATION
2014
January
Published
1
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Optional Fields
FERRITIC STEEL RANGE
The finite element (FE) implementation of a hyperbolic sine unified cyclic viscoplasticity model is presented. The hyperbolic sine flow rule facilitates the identification of strain-rate independent material parameters for high temperature applications. This is important for the thermo-mechanical fatigue of power plant where a significant stress range is experienced during operational cycles and at stress concentration features, such as welds and branch connections. The material model is successfully applied to the characterisation of the high temperature low cycle fatigue behaviour of a service-aged P91 material, including isotropic (cyclic) softening and non-linear kinematic hardening effects, across a range of temperatures and strain-rates.
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