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research-article

Thermomechanical behavior in trepan drilling of yttria-stabilized zirconia by picosecond pulsed laser

[+] Author and Article Information
Hong Shen

School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; State Key Laboratory of Mechanical System and Vibration, Shanghai, 200240, China
sh_0320@sjtu.edu.cn

Decai Feng

State Key Laboratory of Mechanical System and Vibration, Shanghai, 200240, China
fffeeennngggcai@sjtu.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4042778 History: Received October 16, 2018; Revised January 07, 2019

Abstract

It is important to understand the stress induced by phase transformation for cracks during the laser drilling of yttria-stabilized zirconia (YSZ). In this paper, a thermomechanical model is presented to investigate what happened in laser trepan drilling of YSZ. The thermal part involving the interaction between laser and YSZ is developed to obtain the transient temperature. While the mechanical part is to calculate the stress caused by the phase transformation based on the temperature results. The goal of the computational study combined with experimental work reported in this paper is to explore the intrinsic mechanism of cracking from the aspect of phase transformation in laser drilling of YSZ.

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