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| Homogeneity Characterization of Composite Shaped Components Based on Pixel Marking Method |
| ZHANG Yuyan1,2,LI Qihang1,2,WEN Yintang1,2 |
1. School of Electrical Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China
2. Hebei Province Key Laboratory of Measuring and Testing Technologies and Instruments, Yanshan University, Qinhuangdao, Hebei 066004, China |
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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.
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Received: 26 July 2022
Published: 21 February 2024
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2024, Vol. 45 
