Modeling birefringence in SiO 2 glass fiber using surface stress relaxation
Modeling birefringence in SiO 2 glass fiber using surface stress relaxation
复制标题
使用表面应力松弛模拟 SiO 2 玻璃纤维的双折射
DOI：
10.1111/jace.16900
复制
发表时间：
2019
影响因子：
3.9
通讯作者：
Tomozawa, Minoru
中科院分区：
文献类型：
--
作者：
Hausmann, Bronson D.;Miller, Paul A.;Aaldenberg, Emily M.;Blanchet, Thierry A.;Tomozawa, Minoru
利用光弹技术对石英玻璃纤维的延迟性进行了评价。在这里，玻璃纤维的表面双折射被证明是表面应力松弛的结果，从Suprasil II拉制的原材料纤维。将双折射纤维的表面特征与由扩散控制的表面应力松弛产生的残余轴向应力分布的模型进行比较。此外，一个均匀的双折射相当于一个恒定的拉伸应力的纤维被确认，并归因于结构的各向异性在纤维拉伸过程中产生的。结构各向异性对所观察到的双折射的贡献保持不变，因为表面特征被连续蚀刻掉。还观察到表面压缩应力的产生，因为发现对应于表面压缩应力的延迟在短时间热处理期间随着施加的拉伸应力而增加。接收态石英玻璃纤维中延迟曲线的显著特征，具有薄的表面压应力层和补偿内部张应力，与表面应力松弛模型预测的残余应力曲线一致，在校正了观察到的结构各向异性之后。
The retardance of silica glass fibers was evaluated using photoelastic techniques. Here, surface birefringence in glass fibers is shown to be a consequence of surface stress relaxation for as‐received fibers drawn from Suprasil II. The surface features of the birefringent fibers were compared to a model of the residual axial stress profile resulting from a diffusion‐controlled surface stress relaxation. Additionally, a uniform birefringence in the fiber equivalent to a constant tensile stress was recognized and attributed to structural anisotropy produced during fiber drawing. The contribution of structural anisotropy to the observed birefringence remained constant as the surface features were successively etched away. Surface compressive stress generation was also observed, as retardance corresponding to a surface compressive stress was found to increase with applied tensile stress during short heat treatments. Significant features of the retardance profile in as‐received silica glass fibers, with a thin surface compressive stress layer and compensating interior tensile stress, agreed with the residual stress profiles predicted by the surface stress relaxation model after correcting for this observed structural anisotropy.