小截面方管结构CFRP复合材料的超声检测方法

新型飞行器已采用小截面碳纤维增强树脂基(Carbon Fiber Reinforce Polymer, CFRP)复合材料方管结构。针对该类复合材料方管的材料组成和结构特点,分析和对比了常用的超声穿透法、超声反射法和整体超声穿透法对复合材料方管内部质量检测的适用性,提出了超声对面内壁反射法。采用超声对面内壁反射法对试块中的人工缺陷和实际产品进行检测。结果表明,采用该检测方法能够全部检出试样中的10 mm×10 mm的人工分层缺陷,且可有效地检测实际产品的分层和孔洞缺陷。

Ultrasonic testing method for CFRP composites of small section square tube structure

The CFRP composites of small square tube structure have been applied in new aircrafts. According to the material and structure characteristics of the CFRP square tube, the applicability of the frequently used ultrasonic penetration method, ultrasonic reflection method and entire ultrasonic penetration method to square tube quality inspection is analyzed and compared, and a method of ultrasonic reflection on the opposite inner wall is proposed and used to test the artificial defects in test specimen and actual products. The results show that this method can inspect all the artificial delamination defects of 10mm×10mm in the test specimen and the delamination and hole defects in the actual products.