CAJ | 학술논문

研究并建立了激光损伤1064nm增透熔石英的理论模型，采用数值模拟方法计算了1064nm增透熔石英内部的瞬态温度场和应力场分布，分析了激光对1064nm增透熔石英的损伤机理。结果表明：激光对1064nm增透熔石英的损伤存在一定的累积效应，其效果使材料的损伤程度加剧，材料内部沿径向的温度梯度较大，沿轴向产生的温度梯度较小。在应力损伤中，环向应力起主要作用。1064nm增透熔石英发生损伤时，主要从激光作用中心点或光斑半径边缘附近开始。
연구병건립료격광손상1064nm증투용석영적이론모형，채용수치모의방법계산료1064nm증투용석영내부적순태온도장화응력장분포，분석료격광대1064nm증투용석영적손상궤리。결과표명：격광대1064nm증투용석영적손상존재일정적루적효응，기효과사재료적손상정도가극，재료내부연경향적온도제도교대，연축향산생적온도제도교소。재응력손상중，배향응력기주요작용。1064nm증투용석영발생손상시，주요종격광작용중심점혹광반반경변연부근개시。
In this paper,the theoretical model of thermal stress damage of 1064nm anti-reflection fused silica is studied and established, the transient distributions of temperature field and thermal stress field are simulated by using the finite element method (FEM) and then the mechanism of the damage is analyzed. The main results show that there is a cu-mulative effect in the process of 1064nm anti-reflection fused silica damaged by the laser and the material damage de-gree is increased. The radial temperature gradient is bigger and the axial temperature gradient is smaller in the fused sil-ica internal. In thermal stress damage process which circumferential stress acts a primary role, 1064nm anti-reflection fused silica is damaged by the laser which often occurs at the action center or the edge near the spot radius.