An Investigation on CW Laser Induced Two-Dimensional Nonlinear Temperature Field of Metals
-
摘要: 建立了连续波激光作用下金属材料动态温升的物理模型和有限元计算模型。并分别计算了在平均功率密度1 kW/cm2、光斑直径28 mm的连续波激光辐照下,30CrMnSiA钢及LD10-CS铝合金前、后表面及内部温度分布。得到了给定条件下,材料动态升温过程,靶前表面达到熔点的时刻,以及不同时刻靶前、后表面的温度场分布。并比较了两种材料不同的温度响应特性和不同反射率对温升的影响。Abstract: The thermal effects of the continuous wave (CW) laser (intensity 1 kW/cm2, spot diameter 2.8 cm) irradiation on 30CrMnSiA steel and LD10-CS aluminum alloy were investigated with a 2-dimensional finite element model. The simulation gives the target temperature field at different time, the different temperature response of the two metals and the target surface laser reflectivity influence on temperature rise.
-
Key words:
- CW laser /
- laser heating /
- temperature distribution /
- finite element method
-
Bartholomeusz J B. Thermal response of a laser-irradiated metal slab. J Appl Phys, 1988, 64(8): 3815. Sparks M. Theory of laser heating of solids: Metals. Journal of Applied Physics, 1976, 47(3): 837. EI-Adawi K M, Shalaby A S. Laser heating and melting of thin films with time-dependent absorptance: An exact solution for time intervals less than of equal to the transit time. J Appl Phys, 1988, 63(7): 2212. 工程材料实用手册编写委员会. 工程材料实用手册(第3册). 北京: 中国标准出版社, 1989: 218-200. 王伟平, 刘常龄, 王春彦. 重复脉冲激光作用下钢靶动态热响应数值模拟. 应用激光, 1995, 15(5): 204. 孔祥谦. 有限单元法在传热学中的应用. 北京: 科学出版社, 1986.
点击查看大图
计量
- 文章访问数: 6975
- HTML全文浏览量: 386
- PDF下载量: 545