超声波检测方法在内嵌合金短切纤维模压复合材料中应用

Application of Ultrasonic Testing Method to Embedded Alloy Short Cut Fiber Molded Composite Materials

内嵌合金外压纤维增强复合材料(Fiber Reinforced Polymer,简称FRP)工艺用于航空航天飞行载体翼型结构成型时,复合材料与合金脱粘缺陷及其内部分层缺陷严重影响飞行载体安全性能。本文通过对复合材料内嵌合金试验件在不同条件下超声C-scan检测和超声A-scan检测试验结果对比,确定了超声穿透式C-scan检测方法和缺陷类型辨识方法。试验结果表明,本文检测方法对4mm×4mm以上缺陷可以准确检测,对脱粘缺陷和分层缺陷可以准确辨识。

When the embedded alloy externally pressed fiber reinforced polymer(FRP)process is used to form the airfoil structure of aerospace flight carrier,the debonding defect between FRP and alloy and their internal delamination defect seriously affect the safety performance of flight carrier.In this paper,the ultrasonic penetrating C-scan detection method and defect type identification method are determined by comparing the experimental results of ultrasonic C-scan detection and ultrasonic A-scan detection of FRP embedded alloy test pieces of airfoil structure under different conditions.The experimental results show that the detection method can accurately detect the defects above 4mm×4mm,and the debonding defects and delamination defects can be accurately identified.