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Materials (Basel). 2017 Aug 25;10(9). pii: E996. doi: 10.3390/ma10090996.

Experimental Study on Fatigue Behaviour of Shot-Peened Open-Hole Steel Plates.

Author information

1
Department of Civil Engineering, Sichuan University, Chengdu 610065, China. zywang@scu.edu.cn.
2
Sichuan Provincial Key Laboratory of Failure Mechanics and Engineering Disaster Prevention & Mitigation, Sichuan University, Chengdu 610065, China. zywang@scu.edu.cn.
3
Sichuan Provincial Key Laboratory of Failure Mechanics and Engineering Disaster Prevention & Mitigation, Sichuan University, Chengdu 610065, China. wangqy@scu.edu.cn.
4
School of Architecture and Civil Engineering, Chengdu University, Chengdu 610106, China. wangqy@scu.edu.cn.
5
Department of Civil Engineering, Sichuan University, Chengdu 610065, China. 18224482076@139.com.

Abstract

This paper presents an experimental study on the fatigue behaviour of shot-peened open-hole plates with Q345 steel. The beneficial effects induced by shot peening on the fatigue life improvement are highlighted. The characteristic fatigue crack initiation and propagation modes of open-hole details under fatigue loading are revealed. The surface hardening effect brought by the shot peening is analyzed from the aspects of in-depth micro-hardness and compressive residual stress. The fatigue life results are evaluated and related design suggestions are made as a comparison with codified detail categories. In particular, a fracture mechanics theory-based method is proposed and demonstrated its validity in predicting the fatigue life of studied shot-peened open-hole details.

KEYWORDS:

fatigue behaviour; fracture mechanics; open-hole; shot peening

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