RESEARCH PAPER
Temperature-Dependent Fatigue Characteristics of P91 Steel
1
Institute of Applied Mechanics, Faculty of Mechanical Engineering, Cracow University of Technology, 31-864 Kraków Al. Jana Pawła II 37, Poland
2
Huta Stalowa Wola S.A., ul. gen. Tadeusza Kasprzyckiego 8, 37-450 Stalowa Wola, Poland
3
UTP University of Science and Technology, Faculty of Mechanical Engineering, 85-225 Bydgoszcz ul. Kordeckiego 20, Poland
Submission date: 2019-06-17
Acceptance date: 2020-05-15
Online publication date: 2020-07-24
Publication date: 2020-06-01
Acta Mechanica et Automatica 2020;14(2):69-78
KEYWORDS
ABSTRACT
In this paper, the experimental investigations, constitutive description and numerical modelling of low-cycle fatigue behaviour of P91 steel in non-isothermal conditions are presented. First, experimental tests are performed to recognise different aspects of material behaviour. Then, an appropriate constitutive model is developed within the framework of thermodynamics of irreversible processes with internal state variables. The model describes two phases of cyclic softening, related to plastic mechanisms. An important goal of the presented research is to include thermomechanical coupling in the constitutive modelling. Next, the model parameters are identified based on the available experimental data. Some parametric studies are presented. Finally, numerical simulations are performed, which indicate the significant influence of thermomechanical coupling on the response of the constitutive model in thermomechanical fatigue conditions.
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| eISSN: | 2300-5319 |
| ISSN: | 1898-4088 |
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