先进复合材料超声无损检测新技术的应用

 针对航空航天高端装备制造与服役过程中复合材料部件的复杂型面检测、非接触检测、快速检测、现场检测等问题，依托自主研制的新型超声检测系统开展实验研究，基于相控阵超声技术实现碳纤维增强树脂基复合材料L型构件R区孔隙、分层缺陷检测；基于空气耦合超声技术实现蜂窝夹芯复合材料脱黏缺陷检测；基于激光超声技术实现碳纤维树脂基复合材料孔隙、紧固孔分层检测及耐高温复合材料分层缺陷检测。分析了各项技术的关键问题、应用范围和发展方向。研究结果表明，应用超声无损检测新技术可以实现复合材料部件的复杂型面检测、非接触检测和快速检测，并且可以现场应用。

Application of New Developed Techniques for Ultrasonic Nondestructive Testing for Advanced Composite Materials

The applications of the ultrasonic phased array technique, the air-coupled ultrasonic technique and the laser ultrasonic technique for the non-destructive testing for advanced composite materials are reviewed. For the problems of the non-destructive testing for composite parts of aeronautical and astronautical sophisticated equipment in manufacture and service stages, such as the testing of the complex profile parts, the noncontact testing, the fast testing, the on-site testing, a series of self-developed novel ultrasonic testing systems are developed. The effective detection of the porosity and the delamination located at the corner of the Lshaped carbon fibre reinforced plastic (CFRP) composite parts is realized by using the ultrasonic phased array technique. The detection of the interface debonding in honeycomb sandwich composite parts is realized based on the air-coupled ultrasonic technique. The detection of the porosity, the impact-damage and the drilling-induced delamination in CFRP composite parts and the detection of the delamination in refractory composite parts are realized by using the laser ultrasonic technique. The key technical problems, the application scopes and the future development of these novel ultrasonic testing techniques are analysed. It is shown that the new ultrasonic testing techniques can be used for the complex profile detection, the noncontact detection, the fast detection and the on-site detection for composite parts.