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Low cycle fatigue life prediction in shot-peened components of different geometries – Part II: life prediction

Low cycle fatigue life prediction in shot-peened components of different geometries – Part II: life prediction
Low cycle fatigue life prediction in shot-peened components of different geometries – Part II: life prediction
This study investigates the effects of shot peening on the low-cycle fatigue (LCF) performance of a low pressure steam turbine blade material. The finite element (FE) model incorporating shot peening effects, which has been introduced in Part I, has been used to predict the stabilised stress/strain state in shot-peened samples during fatigue loading. The application of this model has been extended to different notched geometries in this study. Based on the modelling results, both the Smith-Watson-Topper and Fatemi-Socie critical plane fatigue criteria have been used to predict the fatigue life of shot-peened samples (treated with two different peening intensities) with varying notched geometries. A good agreement between experiments and predictions was obtained. The application of a critical distance method considering the stress and strain hardening gradients near the shot-peened surface has been found to improve the life prediction results. The effects of surface defects on the accuracy of life predictions using the proposed method were also discussed
8756-758X
749-760
You, Chao
1970d34b-ab33-4098-9363-2df30f36dda1
Achintha, Mithila
8163c322-de6d-4791-bc31-ba054cc0e07d
Soady, Katherine
683b0e6c-6cbf-463c-8d57-c0db32bc0984
Reed, Philippa
8b79d87f-3288-4167-bcfc-c1de4b93ce17
You, Chao
1970d34b-ab33-4098-9363-2df30f36dda1
Achintha, Mithila
8163c322-de6d-4791-bc31-ba054cc0e07d
Soady, Katherine
683b0e6c-6cbf-463c-8d57-c0db32bc0984
Reed, Philippa
8b79d87f-3288-4167-bcfc-c1de4b93ce17

You, Chao, Achintha, Mithila, Soady, Katherine and Reed, Philippa (2017) Low cycle fatigue life prediction in shot-peened components of different geometries – Part II: life prediction. Fatigue & Fracture of Engineering Materials & Structures, 40 (5), 749-760. (doi:10.1111/ffe.12542).

Record type: Article

Abstract

This study investigates the effects of shot peening on the low-cycle fatigue (LCF) performance of a low pressure steam turbine blade material. The finite element (FE) model incorporating shot peening effects, which has been introduced in Part I, has been used to predict the stabilised stress/strain state in shot-peened samples during fatigue loading. The application of this model has been extended to different notched geometries in this study. Based on the modelling results, both the Smith-Watson-Topper and Fatemi-Socie critical plane fatigue criteria have been used to predict the fatigue life of shot-peened samples (treated with two different peening intensities) with varying notched geometries. A good agreement between experiments and predictions was obtained. The application of a critical distance method considering the stress and strain hardening gradients near the shot-peened surface has been found to improve the life prediction results. The effects of surface defects on the accuracy of life predictions using the proposed method were also discussed

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Accepted/In Press date: 28 September 2016
e-pub ahead of print date: 25 October 2016
Published date: 2017
Organisations: Engineering Mats & Surface Engineerg Gp, Education Hub

Identifiers

Local EPrints ID: 401191
URI: http://eprints.soton.ac.uk/id/eprint/401191
ISSN: 8756-758X
PURE UUID: 72eae302-5384-4e35-80c5-e4ec42c91855
ORCID for Chao You: ORCID iD orcid.org/0000-0003-0118-0771
ORCID for Mithila Achintha: ORCID iD orcid.org/0000-0002-1732-3514
ORCID for Philippa Reed: ORCID iD orcid.org/0000-0002-2258-0347

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Date deposited: 10 Oct 2016 10:26
Last modified: 15 Mar 2024 05:57

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Contributors

Author: Chao You ORCID iD
Author: Mithila Achintha ORCID iD
Author: Katherine Soady
Author: Philippa Reed ORCID iD

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