Residual stress near cracks of K_9 and fused silica under 1064 nm nanosecond laser irradiation

Zhen Zhang; Hongjie Liu; Jin HuangXiaoyan ZhouDahua RenXinlu ChengXiaodong JiangWeidong WuWanguo Zheng

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Residual stress near cracks of K_9 and fused silica under 1064 nm nanosecond laser irradiation

机译：Residual stress near cracks of K_9 and fused silica under 1064 nm nanosecond laser irradiation

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摘要

Measurements of birefringence induced in K_9 and fused silica specimens by cracks produced by 1064 nm Nd:YAG laser have been presented. The Birefringence data is converted into the units of stress, thus permitting the estimation of residual stress near crack. The intensity of residual stress in K_9 glass is larger than that in fused silica under the same condition. The similarity of residual stress distribution along the y-axis reveals that the nature of shock wave transmission in optical materials under 1064 nm laser irradiation is the same with each other. The value of residual stress can be influenced by laser parameters and characterization of optical material. Simulation based on a theoretical model giving the residual stress field around a crack is developed for comparison with experiment results. The probability of initial damage and the direction of the energy dissipation in cracks determine the residual stress distribution. The thermal stress coupling enlarges the asymmetry of residual stress distribution. Residual stress in optical material has a strong effect on fracture and should be taken into account in any formulation that involves the enhanced damage resistance of optical components used in laser induced damage experiments.

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来源
《Optical Engineering》 |2012年第11期|114201-1-114201-8|共8页
作者
Zhen Zhang; Hongjie Liu; Jin HuangXiaoyan ZhouDahua RenXinlu ChengXiaodong JiangWeidong WuWanguo Zheng;
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作者单位

Sichuan University, Institute of Atom and Molecular Physics, Chengdu 610000, China;

Research Center of Laser Fusion, CAEP, P.O. Box 919-983, Mianyang 621900, China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
中图分类计量学;
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Residual stress near cracks of K_9 and fused silica under 1064 nm nanosecond laser irradiation

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