激光辐照熔石英控制的ANSYS仿真

Simulation on Stress Control of Laser Irradiated Fused Silica on ANSYS

基于ANSYS平台,对激光辐照熔石英的过程进行动态模拟,分析了温度场和熔池形状、应力场的变化及残余应力分布,并对高温退火去应力的情况进行了仿真。结果表明,激光辐照过程中辐照中央的温度最高,辐照边缘具有较大的温度梯度;冷却至室温后,辐照中央存在较大的拉应力,辐照边缘存在较大的压应力,经过退火后残余应力明显减小。

The process of laser irradiated fused silica was dynamically simulated based on ANSYS. The temperature field, shape of melt pool, stress evolution and distribution of residual stress were analyzed, and the distressing annealing was simulated. The results show that, in the course of laser irradiation, the temperature is highest at the center of irradiation area and the temperature gradient is biggest at the edge of irradiation area. After cooling to room temperature, there is large tensile stress at the center and large compressive stress at the edge. Residual stress is significantly reduced after annealing.