| Autor: |
Hongbing Yao, Zhusheng Zhou, Yanqun Tong, Jie Ping, Liangwan Li, Min Han, Yongkang Zhang |
| Předmět: |
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| Zdroj: |
Optical Engineering; May2012, Vol. 52 Issue 5, p1-4, 4p |
| Abstrakt: |
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 x 10², 4.71 x 10², and 3.59 x 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 106 -107 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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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