连续激光辐照锗材料损伤的数值模拟研究

崔云霞; 牛燕雄; 王彩丽

连续激光辐照锗材料损伤的数值模拟研究

北京航空航天大学仪器科学与光电工程学院,北京100191

详细信息

通讯作者:
崔云霞（1986- ），女，河北张家口人，硕士研究生，主要从事激光与物质相互作用研究。

中图分类号: TN249; O437
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出版历程
- 刊出日期: 2011-03-14

Numerical analysis of CW laser damage in Germanium

School of Instrumentation Science &Opto-electronics Engineering,Beihang University,Beijing 100191,China

摘要

摘要: 以热传导理论和热弹应力理论为基础，建立了连续平顶激光辐照锗材料的二维非稳态物理模型。对受辐照锗材料的热-力场分布进行数值模拟，比较了激光辐照时间对靶材热-力场分布的影响，探讨了温度场及应力场空间梯度随半径的分布以及激光辐照时间对热-力场空间梯度的影响。计算结果表明，靶材中心温升效应最大，而应力最大值出现在光斑半径外侧;光斑边缘处温度场和应力场梯度绝对值均达到最大，随着辐照时间的延长，材料同一点温度场和应力场梯度均增大。在给定条件下，计算了靶材的损伤时间，应力损伤域值最先达到。
- 温度场 /
- 应力场 /
- 温度梯度 /
- 应力梯度
Abstract: A two-dimensional transient physical model of flat-topped laser irradiation Germanium was established based on heat conduction theory and thermoelastic dynamic theory. The thermodynamic field of the irradiated material was simulated to compare the thermodynamic field differences at different irradiation times. The distribution of temperature field and stress field gradients along radius was discussed, as well as the impact of irradiation time on the distribution. The calculation results show that the greatest temperature rise effect occurs at the center of target material, and the temperature goes up as the irradiation time extends, moreover, stress field peak occurs outside the spot radius.The temperature and stress field gradients reach maximum values at the spot edge, and the longer the irradiation time, the greater the temperature and stress fields gradients at a fixed point. Under the given conditions , the damage time of subject material was calculated, and the stress damage threhold was reached first.
- temperature distribution /
- stress distribution /
- temperature gradient /
- stress gradient

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参考文献(1)

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文章访问数: 3203
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连续激光辐照锗材料损伤的数值模拟研究

通讯作者:
崔云霞（1986- ），女，河北张家口人，硕士研究生，主要从事激光与物质相互作用研究。

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Numerical analysis of CW laser damage in Germanium

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连续激光辐照锗材料损伤的数值模拟研究

通讯作者: 崔云霞（1986- ），女，河北张家口人，硕士研究生，主要从事激光与物质相互作用研究。

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出版历程

Numerical analysis of CW laser damage in Germanium

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出版历程

目录

相关数据库

广告合作

友情链接

帮助中心

通讯作者:
崔云霞（1986- ），女，河北张家口人，硕士研究生，主要从事激光与物质相互作用研究。