摘要
A numerical model based on measured fictive temperature distributions is explored to evaluate the residual stress fields of CO_(2)laser-annealed mitigated fused silica damage sites.The proposed model extracts the residual strain from the differences in thermoelastic contraction of fused silica with different fictive temperatures from the initial frozen-in temperatures to ambient temperature.The residual stress fields of mitigated damage sites for the CO_(2)laser-annealed case are obtained by a finite element analysis of equilibrium equations and constitutive equations.The simulated results indicate that the proposed model can accurately evaluate the residual stress fields of laser-annealed mitigated damage sites with a complex thermal history.The calculated maximum hoop stress is in good agreement with the reported experimental result.The estimated optical retardance profiles from the calculated radial and hoop stress fields are consistent with the photoelastic measurements.These results provide sufficient evidence to demonstrate the suitability of the proposed model for describing the residual stresses of mitigated fused silica damage sites after CO_(2)laser annealing.
作者
张传超
廖威
张丽娟
蒋晓龙
方振华
蒋晓东
Chuanchao Zhang;Wei Liao;Lijuan Zhang;Xiaolong Jiang;Zhenhua Fang;Xiaodong Jiang(Laser Fusion Research Center,China Academy of Engineering Physics,Mianyang 621900,China)
基金
Project supported by the National Natural Science Foundation of China(Grant No.62275235).
