ULTRASONIC CHARACTERIZATION AND ANALYSIS OF MACRO DEFECTS IN RTM CARBON FIBER COMPOSITES

Abstract

Abstract: The research object of this paper is RTM carbon fiber composite material. The ultrasonic characteristic scanning system is used to detect a large number of samples. Theoretically, the reflection characteristics of ultrasonic wave will vary with the type of macro defects. In this paper, the reflection characteristics of each defect are analyzed theoretically. Then, different macroscopic natural defects are found out, and the image characteristics of each defect are summarized. Then, the samples were cut into pieces and polished by destructive method, and the morphological characteristics of different defects were observed by microscope. The results show that the ultrasonic characteristic scanning system can detect and distinguish different macroscopic defects, and the morphological features of different types of defects are different by observing the metallographic diagram of defects, which provides a feasible method for the macroscopic defect detection and morphology study of RTM carbon fiber composite.

Key words: RTM, macroscopic defect, morphology features

CLC Number:

TB332

LU Ming-hui,WANG Jun-dong,ZHANG Yi-ping,LI Pei-rui. ULTRASONIC CHARACTERIZATION AND ANALYSIS OF MACRO DEFECTS IN RTM CARBON FIBER COMPOSITES[J]. Fiber Reinforced Plastics/Composites, 2017, 0(4): 70-74.

References

[1] 郑澎. VARTM工艺浸润过程及其应用基础研究[D]. 太原: 中北大学, 2011.
[2] 潘玲玲. 碳纤维复合材料典型车身覆盖件设计开发与试制[D]. 上海: 同济大学, 2006.
[3] 段跃新, 姚福军, 孙玉敏, 等. 工字梁构件的RTM工艺模拟与实验研究[C]//南京复合材料技术发展研讨会.
[4] 段跃新, 姚福军, 张佐光. RTM工艺模拟及干斑缺陷控制研究[J]. 材料工程, 2006(Z1): 285-289.
[5] 孙玉敏, 段跃新, 李丹, 等. 风机叶片RTM工艺模拟分析及其优化[J]. 复合材料学报, 2005, 22(4): 23-29.
[6] 张默. 真空辅助树脂成型实时监测技术研究[D]. 上海: 东华大学, 2011.
[7] 张卫星, 马琳. RTM工艺气泡缺陷形成机理研究[J]. 山西建筑, 2010, 36(28): 127-128.
[8] 钟国旗. TC4钛合金结构件激光焊接装备研发及实验研究[D]. 镇江: 江苏大学, 2015.
[9] 周武平, 车洪艳, 刘国辉, 等. 热等静压扩散连接技术的研究与应用[C]//粉末冶金产业技术创新战略联盟暨2012年中国粉末冶金产业发展论坛. 2012.
[10] 胡坤芳. 判断超声波探伤缺陷的几种方法[J]. 贵州工业大学学报:自然科学版, 2008, 37(5): 78-80.
[11] 孙明磊. 风力发电轴承超声检测方法研究与设备设计[D]. 南昌: 南昌航空大学, 2012.
[12] 朱毅, 陆铭慧. 金属复合材料结合层超声特征成像检测[C]//2007南昌无损检测国际会议——无损检测技术国际研讨会暨无损检测高等教育发展论坛、电磁检测学术交流会. 2007.
[13] 张锐, 陈以方, 付德永. 复合材料手动扫描超声特征成像检测[J]. 材料工程, 2003(4): 34-38.
[14] 李庆, 王海芳, 陈以方,等. 复合板材的超声特征扫描成像检测[J]. 材料工程, 2006(8): 52-56.
[15] 邱桂杰. RTM成型工艺中缺陷形成机理的研究[D]. 武汉: 武汉理工大学, 2002.
[16] 李萍. RTM制品缺陷分析与表征[D]. 武汉: 武汉理工大学, 2007.