1.06μm连续激光照射下K9玻璃板的应力松驰破坏

被引：17

作者：

罗福

孙承纬

杜祥琬

机构：

[1] 中国工程物理研究院流体物理研究所!四川绵阳

[2] 北京应用物理与计算数学研究所!北京

来源：

强激光与粒子束 | 2001年 / 01期

关键词：

K9玻璃; 激光; 热应力; 应力松弛;

D O I：

暂无

中图分类号：

O343.6 [热弹性力学（热应力）]; TN249 [激光的应用];

学科分类号：

摘要：

基于一维应力松弛模型和粘弹性本构关系，对１．０６μｍ连续激光照射下Ｋ９玻璃板中的温升和应力作了计算，结果表明，由于应力松弛效应，激光停照后的冷却过程中产生的残余拉伸应力可达到玻璃的拉伸断裂强度阈值，而激光加热期间的最大压缩应力却小于压缩断裂强度要求。对３ｍｍ厚的Ｋｇ玻璃板，由应力松弛引起破坏所要求的激光参数为９４６ｋＷ／ｃｍ２作用０．２ｓ，因而应力松弛可能为１．０６μｍ连续激光大光斑照射下Ｋ９玻璃窗口损伤的主要模式。

引用

页码：19 / 23

页数：5

共 7 条

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