Measurement of the average strain rate of thin aluminum deformation under laser shock

Hongbing Yao; Zhusheng Zhou; Yanqun Tong; Jie Ping; Liangwan Li; Min Han; Yongkang Zhang

doi:10.1117/1.OE.52.5.054302

30 May 2013 Measurement of the average strain rate of thin aluminum deformation under laser shock

Hongbing Yao, Zhusheng Zhou, Yanqun Tong, Jie Ping, Liangwan Li, Min Han, Yongkang Zhang

Author Affiliations +

Optical Engineering, Vol. 52, Issue 5, 054302 (May 2013). https://doi.org/10.1117/1.OE.52.5.054302

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 3.59×10² 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 ⁷s ⁻¹ as generally estimated in past studies, which offers an experimental reference for the deformation study of strain-rate-dependent metal materials in LSF.

Citation Download Citation

Hongbing Yao, Zhusheng Zhou, Yanqun Tong, Jie Ping, Liangwan Li, Min Han, and Yongkang Zhang "Measurement of the average strain rate of thin aluminum deformation under laser shock," Optical Engineering 52(5), 054302 (30 May 2013). https://doi.org/10.1117/1.OE.52.5.054302

Published: 30 May 2013

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