连续激光对钢壳体热力损伤效应分析  

Study on damage effect of continuous laser on steel cylinder

作　　者：刘扬 汤伟[1] 邵俊峰[1] 刘立生[1] LIU Yang;TANG Wei;SHAO Jun-feng;LIU Li-sheng(State Key Laboratory of Laser-Matter Interaction,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China)

机构地区：[1]中国科学院长春光学精密机械与物理研究所,激光与物质相互作用国家重点实验室,吉林长春130033

出　　处：《激光与红外》2021年第1期89-94,共6页Laser & Infrared

基　　金：激光与物质相互作用国家重点实验室自主基础研究课题(No.SKLLIM1904);中国科学院青年创新促进会基金项目(No.2018248/Y80139C)资助。

摘　　要：为了开展典型材料结构的抗激光防护与加固,需要对各类材料结构进行激光辐照效应研究。本文通过仿真结合实验的方法对到靶功率1.5~2.8 kW、光斑直径10~20 mm连续激光对厚度7~15 mm圆柱形壳体的热力损伤效应进行研究,明确了不同加载条件下的损伤现象与机理。基于相似理论建立强激光辐照下壳体的热力响应模型,通过实验得到了壳体在连续激光作用下的损伤演化历程;由实验结果可知,钢壳体烧蚀机理主要表现为熔融烧蚀及汽化反冲压作用下的质量迁移,烧蚀过程中辐照区域出现了明显的熔化、汽化过程,熔池区有熔融金属喷溅现象。To carry out laser protection and reinforcement of typical material and structures,it is necessary to study the effects of laser irradiation on various material structures.In this paper,the thermal damage effect of a continuous laser with a target power of 1.5 to 2.8 kW and a spot diameter of 10 to 20 mm on a steel cylinder with a thickness of 7 to 15 mm is studied through simulation and experiment methods,and the damage phenomenon and mechanism under different loading conditions are clarified.Based on the similarity theory,the thermal response model of the steel cylinder under high-power laser irradiation was established,and the damage evolution process of the steel cylinder under the action of the continuous laser was obtained through experiments.From the experimental results,the ablation mechanism of the steel cylinder is mainly manifested as melt ablation and mass migration under the action of vaporization and back-stamping,there are obvious melting and vaporization process in the irradiated area during ablation,and molten metal splashing phenomenon occurs in the molten pool area.

关 键 词：连续激光 损伤效应 壳体 温度场模拟 等效实验 

分 类 号：TK124[动力工程及工程热物理—工程热物理]