宇航材料工艺2017，Vol.47Issue(5)：69-74,6.DOI:10.12044/j.issn.1007-2330.2017.05.015
碳纤维复合材料层板冲击损伤的空气耦合兰姆波成像检测
Imaging of CFRP Plate Impact Damage Using Air-Coupled Lamb Waves
摘要
Abstract
The non-contact ultrasonic Lamb wave method can detect the large area composite sheet quickly and has the outstanding advantages in the automatic imaging detection.A0 mode lamb waves were excited by air-coupled ultrasonic probes for carbon fiber reinforced resin (CFRP) composites laminates.The Lamb waves were scanned and detected on the same side of the sample with the impact damage,and the Lamb waves were scanned in two directions which are orthogonal to each other to obtain the detection signals at different positions.Based on the characteristics of the Lamb wave propagation signal in the without defects and with defects plates,the frequency domain analysis of the acquisition signal is carried out.It is caculated for signal difference coefficient (SDC) based on no defects area signal.And SDC is used as characteristic value,the scanning imaging is achieved form characteristic value by using full summation algorithm and full multiplication algorithm data fusion method.Contrast of the amplitude imaging scan,the SDC imaging results are able to reflect the position of impact damage more,and it can show the impact size in two directions.关键词
碳纤维复合材料/冲击损伤/兰姆波成像/空气耦合超声Key words
CFRP/Impact damage/Lamb wave imaging/Air-coupled ultrasonic分类
通用工业技术引用本文复制引用
饶璐雅,陈果,卢超,石文泽..碳纤维复合材料层板冲击损伤的空气耦合兰姆波成像检测[J].宇航材料工艺,2017,47(5):69-74,6.基金项目
国家自然科学基金(51265044,11374134) （51265044,11374134）
江西省自然科学基金(20114BAB202008) （20114BAB202008）
航天科技创新基金(天科研[2013]1143号) （天科研[2013]1143号）
江西省研究生创新专项资金项目(YC20165-S329) （YC20165-S329）
