基于像素标记法的复合材料异型构件均匀性表征

张玉燕; 李启航; 温银堂

doi:10.3969/j.issn.1000-1158.2024.02.15

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计量学报 ›› 2024, Vol. 45 ›› Issue (2) : 246-252. DOI: 10.3969/j.issn.1000-1158.2024.02.15

力学计量

基于像素标记法的复合材料异型构件均匀性表征

张玉燕^1,2,李启航^1,2,温银堂^1,2

作者信息 +

Homogeneity Characterization of Composite Shaped Components Based on Pixel Marking Method

ZHANG Yuyan^1,2,LI Qihang^1,2,WEN Yintang^1,2

Author information +

文章历史 +

摘要

纤维增强陶瓷基复合材料由孔隙缺陷引起的结构不均匀会严重影响构件的宏观力学性能,而整体孔隙率无法有效表征均匀性。针对此问题,提出了一种基于像素标记的空间区块划分方法,实现对异型构件CT扫描体数据的自动分块。在计算出每个区块体孔隙率值的基础上,以孔隙率均值与标准差的乘积为指标,对构件结构均匀性进行定量表征。采用光线投射法对孔隙率进行三维映射,对孔隙率分布进行直观的可视化表征。结果表明:该方法能有效定量表征出异型构件整体及局部均匀性,并从三维角度给出构件局部孔隙率的大小、空间位置信息,为进一步优化制造工艺参数、提高构件服役的可靠性提供了有力依据。

Abstract

The structural inhomogeneity caused by pore defects in fiber-reinforced ceramic matrix composites will seriously affect the macroscopic mechanical properties of the components, while the overall porosity cannot effectively characterize the homogeneity. Aiming at this problem, a spatial block division method based on pixel labeling is proposed to realize the automatic block division of CT scan volume data of special-shaped components . On the basis of calculating the porosity value of each block, the product of the mean porosity and the standard deviation is used as the index to quantitatively characterize the structural uniformity of the components. The 3D mapping of the porosity is carried out by the ray projection method, and the porosity distribution is visualized and characterized. The results show that the method can effectively quantitatively characterize the overall and local uniformity of the special-shaped component, and give the local component from a 3D perspective. The size and spatial position information of the porosity provide a strong basis for further optimizing the manufacturing process parameters and improving the reliability of component service.

导出引用

张玉燕,李启航,温银堂. 基于像素标记法的复合材料异型构件均匀性表征[J]. 计量学报. 2024, 45(2): 246-252 https://doi.org/10.3969/j.issn.1000-1158.2024.02.15

ZHANG Yuyan,LI Qihang,WEN Yintang. Homogeneity Characterization of Composite Shaped Components Based on Pixel Marking Method[J]. Acta Metrologica Sinica. 2024, 45(2): 246-252 https://doi.org/10.3969/j.issn.1000-1158.2024.02.15

中图分类号： TB93

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