| 超声评价碳/环氧三维编织复合材料的实验分析 |
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| 引用本文： | 王国军,孙颖,李嘉禄.超声评价碳/环氧三维编织复合材料的实验分析[J].玻璃钢/复合材料,2009,209(6):39-42. |
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| 作者姓名： | 王国军 孙颖 李嘉禄 |
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| 作者单位： | 天津工业大学复合材料研究所,天津市和教育部先进纺织复合材料重点实验室,天津,300160 |
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| 基金项目： | 天津市高等学校科技发展基金计划项目，天津市重点基金项目 |
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| 摘 要： | 本文采用超声回波法对碳/环氧三维编织复合材料进行超声A 扫描，结合对超声定位的缺陷区域进行细观形
貌解剖分析，研究了超声回波波形和三维编织复合材料细观形貌特征的对应关系。在考虑碳纤维单丝分布及纤维束
和树脂界面状态的基础上，利用经验的波形分析法讨论了超声波在三维编织复合材料中的衰减。实验研究结果表明
，超声回波特征和三维编织复合材料缺陷有对应关系，超声A 扫描波形特征分析可用于碳/环氧三维编织复合材料
的无损检测及其缺陷的初步评价。
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| 关 键 词： | 三维编织复合材料 超声回波法 缺陷细观形貌 波形分析法 超声衰减 |
EXPERIMENTAL STUDY ON ULTRASONIC EVALUATION OF
CARBON/EPOXY 3D BRAIDED COMPOSITES |
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| Abstract: | Ultrasonic echo A scan method was used to scan carbon/epoxy 3D braided composites.
Defects areas located by using ultrasonic scanning were anatomized microscopically to investigate
the relationships between the ultrasonic pulse wave characteristics and micro morphology of
defects. Based on the experimental identification method depended on wave analysis method,the
ultrasonic attenuation of 3D braided composites was discussed from the point of the distribution of
carbon filaments and the interfaces between carbon fiber bundles and resin. The experimental results
show that the characteristics of ultrasonic propagation and attenuation in the composites are
related to the microstructure and some defects within the 3D braided composites. The
characterization of ultrasonic A scan signal can be used to nondestructive inspection and defects
assessment. |
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| Keywords: | 3D braided composites ultrasonic echo method micro-morphology of defects wave analysis method ultrasonic attenuation |
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