摘要
利用太赫兹时域光谱成像技术检测了内含缺陷的玻璃纤维与碳纤维增强复合材料,获得了材料内部缺陷的太赫兹透射图像,从而实现对复合材料样本的无损检测。实验结果表明,太赫兹透射成像技术可检测出多层玻璃纤维复合材料的层间缺陷。但该技术对于碳纤维复合材料中缺陷的检测能力有限,主要是因为碳纤维具有导电特性,导致太赫兹信号对其穿透能力有限。通过对成像模式的调节,太赫兹无损检测技术可对碳纤维材料内部深度约为0.2 mm、宽度为10 mm的缺陷进行成像检测。这为发展准确、灵敏、高效的纤维增强复合材料太赫兹无损检测技术提供了基础实验数据。
Terahertz Time-Domain Spectroscopic(THz-TDS) imaging technology is utilized to inspect the inner defects in the Glass/Carbon Fiber Reinforced Plastic(GFRP/CFRP). The nondestructive evaluation of FRP is accomplished by obtaining the transmission terahertz images of samples. The results demonstrate the delamination in GFRP with multi-layer structure can be effectively detected by THz-TDS imaging technology. Nevertheless, the capability of this technology for inspecting the defects in CFRP is limited mostly because the CFRP is electrically conductive, resulting the amount of terahertz signal transmitting through the CFRP is limited. By adjusting the imaging orientation, THz Nondestructive Evaluation(NDE) technology can be used to image and detect the inner defect(depth:0.2 mm, width:10 mm) within the CFRP samples. This study provides basic experimental data for the development of an accurate, sensitive, and effective THz NDE technique of FRP.
出处
《太赫兹科学与电子信息学报》
2015年第3期396-400,共5页
Journal of Terahertz Science and Electronic Information Technology
基金
重庆市应用开发重大基金资助项目(cstc2013yykf C00007)
中国科学院"西部之光"人才培养计划"西部博士资助项目"
国家教育部回国人员科研启动基金资助项目
关键词
太赫兹时域光谱成像技术
无损检测
玻璃纤维增强复合材料
碳纤维增强复合材料
层间缺陷
terahertz time-domain spectroscopic imaging
nondestructive evaluation
Glass Fiber Reinforced Plastic
Carbon Fiber Reinforced Plastic
delamination
