Zhang Yun, Dong Bo, Bai Yulei, Ye Shuangli, Lei Zhenkun, Zhou Yanzhou
Opt Express. 2015 Oct 19;23(21):28067-75. doi: 10.1364/OE.23.028067.
An updated B-scan method is proposed for measuring the evolution of thermal deformation fields in polymers. In order to measure the distributions of out-of-plane deformation and normal strain field, phase-contrast spectral optical coherence tomography (PC-SOCT) was performed with the depth range and resolution of 4.3 mm and 10.7 μm, respectively, as thermal loads were applied to three different multilayer samples. The relation between temperature and material refractive index was predetermined before the measurement. After accounting for the refractive index, the thermal deformation fields in the polymer were obtained. The measured thermal expansion coefficient of silicone sealant was approximately equal to its reference value. This method allows correctly assessing the mechanical properties in semitransparent polymers.
提出了一种更新的B扫描方法来测量聚合物中热变形场的演变。为了测量面外变形和法向应变场的分布，在对三个不同的多层样品施加热载荷时，分别在深度范围为4.3 mm和分辨率为10.7μm的情况下进行了相衬光谱光学相干断层扫描（PC-SOCT）。在测量之前预先确定了温度与材料折射率之间的关系。考虑折射率后，获得了聚合物中的热变形场。测得的硅酮密封胶的热膨胀系数约等于其参考值。该方法能够正确评估半透明聚合物的力学性能。
