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
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
2017
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), .
(doi:10.1111/ffe.12542).
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
Text
FFEMS_Part II_R1_final.pdf
- Accepted Manuscript
More information
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
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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
Author:
Mithila Achintha
Author:
Katherine Soady
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