基于多频率超声综合比对法的三维编织复合材料检测

3Dbraided composites testing based on multi-frequency ultrasonic comprehensive comparison method

介绍了三维编织复合材料的工艺成型特点以及容易产生的缺陷类型。采用多种频率的超声波对三维编织材料内部的缺陷进行检测,并对检测结果进行综合比对分析。试验结果表明,多频率超声综合比对法虽然无法对材料内部的孔隙分布进行定量检测,但可以对不同区域孔隙分布情况进行判断。

The process characteristics of 3Dbraided composites materials and the types of defects that are prone to occur were introduced.Variety of frequencies of ultrasonic waves were used to detect defects inside the material,and the test results were comprehensively compared and analyzed.The test results showed that although the multifrequency ultrasonic comprehensive comparison method cannot quantitatively detect the pore distribution inside the material,it can judge the pore distribution in different regions.