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Optical Engineering

Measurement of the average strain rate of thin aluminum deformation under laser shock
Author(s): Hongbing Yao; Zhusheng Zhou; Yanqun Tong; Jie Ping; Liangwan Li; Min Han; Yongkang Zhang
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Paper Abstract

A novel optoelectronic measurement system using a beam-shading technique is developed to detect the dynamic characteristics of a metal sheet under laser shock in laser shock forming (LSF), including deformation, strain, and strain rate. Experiments conducted yield the dynamic deformations at two points on an aluminum sheet with a thickness of 0.25 mm in LSF. The average strain rates calculated in the experiments are 5.46×10 2 , 4.71×10 2 , and 3.59×10 2   s −1 when the targets were hit by laser pulses with energies of 5, 6, and 8 J, respectively. The results show that the strain rate induced by laser shocking is not at the ultrahigh level of 10 6 –10 7   s −1 as generally estimated in past studies, which offers an experimental reference for the deformation study of strain-rate-dependent metal materials in LSF.

Paper Details

Date Published: 30 May 2013
PDF: 5 pages
Opt. Eng. 52(5) 054302 doi: 10.1117/1.OE.52.5.054302
Published in: Optical Engineering Volume 52, Issue 5
Show Author Affiliations
Hongbing Yao, Jiangsu Univ. (China)
Zhusheng Zhou, Jiangsu Univ. (China)
Yanqun Tong, Jiangsu Univ. (China)
Jie Ping, Jiangsu Univ. (China)
Liangwan Li, Jiangsu Univ. (China)
Min Han, Jiangsu Univ. (China)
Yongkang Zhang, Jiangsu Univ. (China)

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