快速和高精度透视测量玻璃纤维/树脂复合材料构件内部的离面位移

提出一种光学干涉谱域相位对照B扫描，透视测量透明或半透明玻璃纤维/树脂复合材料内部离面位移的方法。针对玻璃纤维增强树脂基复合材料，设计了一种由树脂层模仿树脂基体、气隙层模仿裂缝气隙、玻璃层模仿玻璃纤维构成的树脂-玻璃复合构件，然后以此复合构件作为标定和量化系统的标准件进行实验研究。通过对平滑或散斑表面树脂-玻璃复合构件分别进行加载前后干涉光谱的两次拍摄，完成构件内部切面的离面位移测量，测量速度快。该系统的视场范围为3.5 mm、轮廓测量分辨率为±26.6 μm、离面位移测量精度为±0.1 μm、测量深度为2.66 mm。该方法在玻璃纤维增强树脂基复合材料力学性能测量和无损检测领域应用前景良好。

Rapid and high-precision measurement of out-of-plane displacement inside the glass fiber/polymer composite

Based on an optical interference phase-contrast theory in the spectral domain, we propose a B-scan method to measure the out-of-plane displacement inside the glass fiber/polymer composite. In order to quantify its performance, composite members are specially designed, in which the polymer layer, air layer and glass layer represented the polymer base, crack and glass fiber in glass fiber/polymer composite. The measurement is executed by two snapping the interferograms before and after the load are applied, therefore, the processing is rapid. The system has the properties as: the field of view is 3.5 mm, the resolution of the contour is ±26.6 μm, the resolution of the out-of-plane displacement is ±0.1 μm, the range of the depth is 2.66 mm. This technology has a bright future in the mechanical properties measurement and non-destructive testing of the glass fiber reinforced resin matrix composite.