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research-article

Investigation for Different Geometrical Features on Residual Stress Field after Abrasive Waterjet Peening

[+] Author and Article Information
Meng Zhang

School of Mechanical Engineering, Zhengzhou University, Zhengzhou 450001, China
zhangmeng19870725@126.com

Zhanshu He

School of Mechanical Engineering, Zhengzhou University, Zhengzhou 450001, China
hezhanshu@qq.com

Yuanxi Zhang

School of Mechanical Engineering, Zhengzhou University, Zhengzhou 450001, China
863831667@qq.com

Xingdong Wang

Ministry of Education & Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering, Wuhan University of Science and Technology, Wuhan 430080, China
442309012@qq.com

Shusen Zhao

School of Mechanical Engineering, Zhengzhou University, Zhengzhou 450001, China
zsscn1994@163.com

Ting Fu

Ministry of Education & Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering, Wuhan University of Science and Technology, Wuhan 430080, China
futing1234gh@wust.edu.cn

Lei Chen

School of Mechanical Engineering, Zhengzhou University, Zhengzhou 450001, China
327057454@qq.com

1Corresponding author.

ASME doi:10.1115/1.4041940 History: Received March 27, 2018; Revised November 06, 2018

Abstract

Abrasive waterjet (AWJ) peening can be used for metal surface strengthening by introducing near-surface plastic strain and compressive residual stress. The present studies seldom focus on residual stress by AWJ peening of targets with different geometrical features. In fact, those targets usually exist on some machine parts including gear roots, shaft shoulders and stress concentration areas. According to Hertz theory of contact and Miao's theoretical model for predicting residual stress of flat surface, this paper developed a theoretical model for investigating residual stress of targets with different geometrical features including concave arc surface, concave sphere surface, convex arc surface and sphere surface. AWJ peening of targets with different geometrical features and different radii of Gaussian curved surface was simulated by ABAQUS. Theoretical results were consistent with numerical simulation results and published experimental results, which will be helpful for predicting residual stress of gear roots, shaft shoulders and stress concentration areas after AWJ peening. The research results showed that under the same peening parameters, s_max, s_top, d_max and d_bottom in concave surface (including concave arc surface and concave sphere surface) were the maximum; s_max, s_top, d_max and d_bottom in convex surface (including convex arc surface and sphere surface) were the minimum; for concave surface, s_top, s_max, d_bottom and d_max decreased respectively with target radius; for convex surface, s_top, s_max, d_bottom and d_max increased respectively with target radius.

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