A unified viscoplastic model for high temperature low cycle fatigue of service-aged p91 steel

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

doi:10.1115/1.4025618

A unified viscoplastic model for high temperature low cycle fatigue of service-aged p91 steel

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

School of Engineering

Research output: Contribution to journal › Article › peer-review

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 plants where a significant stress range is experienced during operational cycles and at stress concentration features, such as welds and branched connections. The material model is successfully applied to the characterisation of the high temperature low cycle fatigue behavior of a service-aged P91 material, including isotropic (cyclic) softening and nonlinear kinematic hardening effects, across a range of temperatures and strain-rates.

Original language	English
Article number	021402
Journal	Journal of Pressure Vessel Technology, Transactions of the ASME
Volume	136
Issue number	2
DOIs	https://doi.org/10.1115/1.4025618
Publication status	Published - Apr 2014

Keywords

high temperature low cycle fatigue
material Jacobian
service-aged P91
strain-rate independence
unified viscoplasticity

Access to Document

10.1115/1.4025618

Cite this

@article{90d7233cff3f4b948031bafca5b51158,

title = "A unified viscoplastic model for high temperature low cycle fatigue of service-aged p91 steel",

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 plants where a significant stress range is experienced during operational cycles and at stress concentration features, such as welds and branched connections. The material model is successfully applied to the characterisation of the high temperature low cycle fatigue behavior of a service-aged P91 material, including isotropic (cyclic) softening and nonlinear kinematic hardening effects, across a range of temperatures and strain-rates.",

keywords = "high temperature low cycle fatigue, material Jacobian, service-aged P91, strain-rate independence, unified viscoplasticity",

author = "Barrett, {R. A.} and Farragher, {T. P.} and Hyde, {C. J.} and O'Dowd, {N. P.} and O'Donoghue, {P. E.} and Leen, {S. B.}",

year = "2014",

month = apr,

doi = "10.1115/1.4025618",

language = "English",

volume = "136",

journal = "Journal of Pressure Vessel Technology, Transactions of the ASME",

issn = "0094-9930",

number = "2",

}

TY - JOUR

T1 - A unified viscoplastic model for high temperature low cycle fatigue of service-aged p91 steel

AU - Barrett, R. A.

AU - Farragher, T. P.

AU - Hyde, C. J.

AU - O'Dowd, N. P.

AU - O'Donoghue, P. E.

AU - Leen, S. B.

PY - 2014/4

Y1 - 2014/4

N2 - 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 plants where a significant stress range is experienced during operational cycles and at stress concentration features, such as welds and branched connections. The material model is successfully applied to the characterisation of the high temperature low cycle fatigue behavior of a service-aged P91 material, including isotropic (cyclic) softening and nonlinear kinematic hardening effects, across a range of temperatures and strain-rates.

AB - 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 plants where a significant stress range is experienced during operational cycles and at stress concentration features, such as welds and branched connections. The material model is successfully applied to the characterisation of the high temperature low cycle fatigue behavior of a service-aged P91 material, including isotropic (cyclic) softening and nonlinear kinematic hardening effects, across a range of temperatures and strain-rates.

KW - high temperature low cycle fatigue

KW - material Jacobian

KW - service-aged P91

KW - strain-rate independence

KW - unified viscoplasticity

UR - http://www.scopus.com/inward/record.url?scp=84892174291&partnerID=8YFLogxK

U2 - 10.1115/1.4025618

DO - 10.1115/1.4025618

M3 - Article

AN - SCOPUS:84892174291

SN - 0094-9930

VL - 136

JO - Journal of Pressure Vessel Technology, Transactions of the ASME

JF - Journal of Pressure Vessel Technology, Transactions of the ASME

IS - 2

M1 - 021402

ER -

A unified viscoplastic model for high temperature low cycle fatigue of service-aged p91 steel

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this