publication . Article . Conference object . 2013

A unified viscoplastic model for high temperature low cycle fatigue of service-aged P91 steel

Barrett, R.A.; Farragher, T.P.; Hyde, Christopher J.; O'Dowd, N.P.; O'Donoghue, P.E.; Leen, S.B.;
Open Access
  • Published: 14 Jul 2013 Journal: Journal of Pressure Vessel Technology, volume 136 (issn: 0094-9930, eissn: 1528-8978, Copyright policy)
  • Publisher: ASME International
  • Country: China (People's Republic of)
Abstract
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-l...
Subjects
free text keywords: Mechanical Engineering, Mechanics of Materials, Safety, Risk, Reliability and Quality, Viscoplasticity, Hardening (computing), Finite element method, Softening, Structural engineering, business.industry, business, Stress concentration, Nonlinear system, Isotropy, Materials science, Hyperbolic function, Vibration fatigue
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publication . Article . Conference object . 2013

A unified viscoplastic model for high temperature low cycle fatigue of service-aged P91 steel

Barrett, R.A.; Farragher, T.P.; Hyde, Christopher J.; O'Dowd, N.P.; O'Donoghue, P.E.; Leen, S.B.;