A method for characterizing equivalent needling density of carbon / carbon composite material
By employing optical microscopy and image analysis, the problem of characterizing the density and uniformity of needle-reinforced structures in carbon/carbon composites was solved, enabling accurate quantitative characterization of needle-reinforced structures and improving the accuracy and consistency of material performance evaluation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HUNAN BOYUN NEW MATERIALS
- Filing Date
- 2026-04-03
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies cannot accurately characterize the density and uniformity of needle-punched reinforcement structures in carbon/carbon composites, resulting in a lack of effective correlation between material structure evaluation and actual service performance, which affects material selection and structural safety assessment.
By employing optical microscopy and image analysis methods, microscopic image data is obtained by cutting the material along the carbon fiber reinforcement direction. By introducing statistical regions and baseline technical rules in the thickness direction, the equivalent needle density and uniformity index are calculated, thereby achieving quantitative characterization of the needle-reinforced structure.
It enables accurate quantitative characterization of needle-reinforced structures in carbon/carbon composites, improving the accuracy of material design, process optimization, and quality consistency, reducing testing costs, and effectively reflecting the uniformity of needle distribution and overall reinforcement capability.
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