纤维织物复合材料组分材料体分比的显微CT实验测定法

摘要

A method for measuring the volume fractions of component material of textile composite by using micro CT experiments was developed.This method can present global,local fiber and yarn volume fractions by micro CT images in different scales,and can also offer solutions to the difficult volume fractions measurement of component materials of some composites which cannot be measured directly by conventional physical experiments.An E-Glass/Epoxy textile composite was used to illustrate the feasibility and reasonability of the method by the comparisons of the measured values among ASTM D3171 Procedure G,scanning electron microscope and micro CT experiments.Corresponding image processing methods for the scanning electron microscope and micro CT images were used to acquire the accurate component material segmentations.The measurement of micro CT experiments can be widely applied to measure the volume fractions of component materials of composite.%针对纤维织物复合材料的组分材料体分比测定问题,提出一种基于显微CT图像的测定方法.该方法可以通过不同尺度的显微CT图像分别测定全局纤维体分比、局部纤维体分比和纤维束体分比参数,还可以为难以用常规物理实验测定体分比的复合材料组分材料体积分数测定提供解决方案.以E-Glass/Epoxy纤维织物复合材料为研究对象,对比ASTM D3171 Procedure G、扫描电镜实验和显微CT实验三种测定法的测量值,结果证明了显微CT实验测定法的可行性和合理性.针对扫描电镜图像和显微CT图像,分别给出了相应的图像处理方法,为获得正确的组分材料分割结果提供了技术保证.显微CT实验测定方法可以广泛应用于复合材料组分材料体分比的测定.