What is the recommended method for inspecting bonded areas in composite structures?

The recommended method for inspecting bonded areas in composite structures involves utilizing visual inspection alongside non-destructive techniques. This approach is essential because bonded areas in composites can be difficult to evaluate due to the materials' unique characteristics, such as varying fiber orientations and resin types. Visual inspections allow for the detection of surface anomalies like delaminations, cracks, or signs of wear, while non-destructive testing methods—such as ultrasonic testing or thermography—can penetrate deeper into the material to reveal internal flaws without causing any damage.

High-pressure water cleaning is not an inspection method; instead, it is used for surface cleaning and preparation, which does not provide any insight into structural integrity. Magnetic particle inspection is primarily suited for ferromagnetic materials and is not effective for composite structures, as these are typically non-metallic and cannot be magnetized. Ultrasonic testing can be a part of non-destructive techniques for composites, but it is one of several methods used, whereas visual inspection is universally applicable and often the first step in any evaluation of bonded areas. Thus, the combination of visual inspection and suitable non-destructive techniques is the most comprehensive approach for ensuring the integrity of composite bonds.