针对细编穿刺碳/碳复合材料显微CT细观图像低对比度的特点,提出采用两步法筛选出纤维束和基体之间分界的灰度阈值,将原图像分别转化为纤维束和孔隙的二值图.再结合中值滤波、图像膨胀和腐蚀算法,消除噪声影响、光滑图像边界线.对处理后的细观图像进行统计,发现基体孔隙率满足正态分布,X向和Y向纤维束局部弯曲度分别满足正态分布和Laplace分布.在此基础上建立了包含上述典型细观特征参数的力学模型,预测的拉伸模量和剪切模量满足Laplace分布,泊松比满足正态分布.实验验证了模型预测的拉伸模量分布规律.
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