Abstract

In this study we try to explore the concept of “Aircraft Composite Testing” in a holistic context. The main focus of the research is on “Aircraft Composite Testing” and its relation with “non-destructive environments”. The research also analyzes many aspects of “Aircraft Composite Testing” and tries to gauge its effect in “non-destructive settings”. Finally the research describes various factors which are responsible for safe conduct of “Aircraft Composite Testing” and tries to describe the overall effect of “Aircraft Composite Testing” in the overall “non-destructive surroundings”.

Aircraft Composite Testing using Non-Destructive Methods

NDT (Non-Destructive Testing, NDT) is a non-destructive means of using sound, light, electricity, heat, magnetism, and radiation detection technologies such as materials, components inside the pores, inclusions, cracks, delamination and other effects of its use defects and their location. Currently, aviation composite materials NDT methods are ultrasonic testing, radiation detection. In this paper, common defect types, discusses the aviation composite materials on the needs of non-destructive testing technology, introduced several aviation composite materials and the status of NDT technology applications, and nondestructive testing composite materials for aviation technology development trends are discussed.

Aviation composite materials and nondestructive testing of defects

Composite material is light weight, high specific strength than stiffness, fatigue resistance, can be designed of the advantages of air travel in favor of weight loss, thereby gaining more and more widely used. Fiber reinforced composite materials in the physical properties of the anisotropy, attenuation and other characteristics make it a serious non-destructive testing of metal materials with the traditional distinction exists, how the internal quality control of composite materials become a research hotspot. The following common defects in composite materials with the type of aeronautical composite materials outlined the technical requirements of NDT (Fortune, p.187).

The type of defect in composite materials generally include: cracks, resin cracking, breaking, bonding defects, voids, delamination, inclusions, excess glue, degumming, layer thick or thin, fiber breakage and curling, poor adhesive, the thickness of off, wear, scratch, resin stacking, layer folds, pits, bumps, plot aneurysm. One crack, fracture, voids, delamination and other general aviation composite components are the main defects. Aviation composite components common defect types, effects and detection features (Pavia, 621-22).

Microwave Detection

As a high-frequency electromagnetic waves, microwaves are characterized by short wavelength, high frequency, frequency bandwidth, the wavelength range between 1mm ~ 1000mm, the frequency is usually 300MHz or 300GHz. Microwave penetration in the composite ability, attenuation, can overcome the deficiencies of other detection methods, such as ultrasonic attenuation in composite materials, difficult to detect defects within the deeper parts, ray defect detection sensitivity and low planar microwave detection of holes in the composite structure, loose, matrix cracking, delaminating and debonding defects such as high sensitivity (Luna, 675-9).

NDT Aviation Composite Technology Development Prospects

In order to improve the ability of quantitative detection, the United States, Britain and other developed countries have started to develop and research a variety of imaging techniques, signal processing techniques and new methods of calculation of defects. To ultrasonic testing, for example, the United Kingdom Ultrasonic Scientific Ltd. (USL) for the BAE Systems offers 17-axis ...