A physically-based constitutive model for high temperature microstructural degradation under cyclic deformation

RA Barrett, PE O'Donoghue, SB Leen - International Journal of Fatigue, 2017 - Elsevier
This paper presents a dislocation-mechanics cyclic viscoplasticity model which incorporates
the key physical micro-mechanisms of strengthening and softening for high temperature …

Development of life assessment procedures for power plant headers operated under flexible loading scenarios

TP Farragher, S Scully, NP O'Dowd, SB Leen - International Journal of …, 2013 - Elsevier
A finite element methodology for thermo-mechanical fatigue analysis of a subcritical power
plant outlet header under realistic loading conditions is presented. The methodology …

An improved unified viscoplastic constitutive model for strain-rate sensitivity in high temperature fatigue

RA Barrett, PE O'Donoghue, SB Leen - International Journal of Fatigue, 2013 - Elsevier
An improved unified cyclic viscoplastic material model for high temperature fatigue of P91
steel is presented. The primary enhancement over existing models is in relation to strain-rate …

Characterization of viscoplasticity behaviour of P91 and P92 power plant steels

AA Saad, TH Hyde, W Sun, CJ Hyde… - International Journal of …, 2013 - Elsevier
This paper deals with the determination of material constitutive model for P91 and P92
steels at high temperatures. An isothermal, strain-controlled test programme was conducted …

Optimization design of heat dissipation structure of inserts supporting run-flat tire

L Zang, Y Cai, B Wang, R Yin, F Lin… - Proceedings of the …, 2019 - journals.sagepub.com
Inserts supporting run-flat tire is a key technology in the field of vehicle active safety. When
the vehicle is under zero driving condition, the deformation of the inserts supporting run-flat …

Micromechanical finite element modelling of thermo-mechanical fatigue for P91 steels

DF Li, RA Barrett, PE O'Donoghue, CJ Hyde… - International Journal of …, 2016 - Elsevier
In this paper, the cyclic plasticity and fatigue crack initiation behaviour of a tempered
martensite ferritic steel under thermo-mechanical fatigue conditions is examined by means …

Multiaxial thermo-mechanical fatigue life prediction based on notch local stress-strain estimation considering temperature change

F Chen, DG Shang, DH Li, LW Wang - Engineering Fracture Mechanics, 2022 - Elsevier
The modified incremental multiaxial Neuber rule by considering the temperature change
was firstly proposed, which combined with the Chaboche viscoplastic constitutive model to …

Cyclic plasticity of welded P91 material for simple and complex power plant connections

M Li, RA Barrett, S Scully, NM Harrison, SB Leen… - International Journal of …, 2016 - Elsevier
This paper focuses on with the cyclic plasticity modelling of welded, ex-service P91 material.
A multi-material model is developed for high temperature cyclic plasticity, including the …

[HTML][HTML] A physically-based method for predicting high temperature fatigue crack initiation in P91 welded steel

J Zhou, RA Barrett, SB Leen - International Journal of Fatigue, 2021 - Elsevier
A methodology is presented for physically-based prediction of high temperature fatigue
crack initiation in 9Cr steels, with a focus on material inhomogeneity due to welding-induced …

Cyclic softening behaviour of a P91 steel under low cycle fatigue at high temperature

AA Saad, W Sun, TH Hyde, DWJ Tanner - Procedia Engineering, 2011 - Elsevier
This paper describes a model used to represent the cyclic mechanical behaviour of P91
martensitic steel. Low cycle fatigue tests were conducted at 600° C using a thermo …