摘要
利用热弹性理论分析了在光学材料中由于缺陷吸收激光能量引起的温度和热应力分布 ,并且针对一个简单的裂纹模型分析了热应力产生的应力强度因子 。
This paper presents the distributions of temperature and thermal stress in the transparent optical materials, resulting from the laser energy-absorption of a defect. When the defect is point like, the maximum value of normal stress in y direction locates on the boundary. With the increase of x , the stress decreases obviously. But when there exists a line flow, the normal stress in y direction is minimum at the boundary and is singular at the two ends of the linear flaw. Based on a simple crack model, the relative stress intensity factor (SIF) and effects of various parameters on SIF were analyzed. The results show that, in the case of point like defect, SIF increases monotonously with the enlargement of the ratio between the crack length and the distance from the defect to the boundary line. However, the effect of the ratio on SIF is more complex, when the flaw is linear. The method adopted in this paper can be expanded to analyze planar flaw or the parallel multi flaws. .
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2002年第2期213-217,共5页
High Power Laser and Particle Beams
基金
国家自然科学基金 ( 10 0 0 2 0 2 1)
国家 86 3激光技术领域资助课题
