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Open AccessArticle

Effect of Shot Blasting on Fatigue Strength of Q345B Steel Plate with a Central Hole

1
Key Laboratory of Deep Underground Science and Engineering (Ministry of Education), School of Architecture and Environment, Sichuan University, Chengdu 610065, China
2
Department of Civil Engineering, Sichuan University, Chengdu 610065, China
3
School of Architecture and Civil Engineering, Chengdu University, Chengdu 610106, China
*
Authors to whom correspondence should be addressed.
Metals 2017, 7(12), 517; https://doi.org/10.3390/met7120517
Received: 15 October 2017 / Revised: 5 November 2017 / Accepted: 7 November 2017 / Published: 23 November 2017
(This article belongs to the Special Issue Fatigue and Wear for Steels)
The fatigue strength of Q345B steel plate with a central hole after shot blasting is studied herein. The improvement of fatigue strength related to the failure behavior is highlighted with due analysis of fatigue cracks initiation at the defect below the condensed surface induced by shot blasting. The effect of stress concentration is shown to be non-ignorable in the fatigue strength analysis. Codified fatigue categories in accordance with EN 1993-1-9 are used in drawing a comparison of studied fatigue behavior. Finally, an analytical model based on a modified reference model is proposed for the evaluation of the test fatigue strength results. It is demonstrated that the predicted results agree well with test data, since the stress ratio and the size of the defect as well as the stress concentration are appropriately considered. View Full-Text
Keywords: central hole; shot blasting; fatigue behavior; fracture mechanics central hole; shot blasting; fatigue behavior; fracture mechanics
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MDPI and ACS Style

You, X.; Wang, Z.; Wang, Q.; Cao, M.; Shen, M.; Huang, W. Effect of Shot Blasting on Fatigue Strength of Q345B Steel Plate with a Central Hole. Metals 2017, 7, 517.

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