New method for detecting internal defect of honeycomb

Abstract

The invention provides a new method for detecting an internal defect of a honeycomb, and belongs to the technical field of non-destructive testing. The method combines a transmission method ultrasonicscanning detection technology, a reflection method ultrasonic scanning detection technology and an X-ray detection technology, and individual parts are verified by further assisting by a computer tomography scanning imaging technology. According to the invention, relatively accurate and economical means are adopted to locate, characterize, position and quantify internal defects of parts, so thatthe detection work efficiency and quality guarantee of honeycomb sandwich structure parts are improved, and the smooth completion of a production task is ensured.

Description

technical field [0001] The invention belongs to the technical field of non-destructive testing, relates to a method for detecting internal defects of honeycomb, and involves combining two non-destructive testing methods (ultrasonic and ray) to locate and characterize the internal defects of parts with relatively accurate and economical means and quantitative. Background technique [0002] Composite honeycomb sandwich structures have been widely used in aerospace and many other fields. However, as a multi-phase material, composite materials may be produced during the manufacturing process due to factors such as environment, raw materials, process specifications, and structural design. Various manufacturing defects. The generation, expansion and accumulation of these defects will aggravate the environment and stress corrosion of the material, seriously reduce the mechanical properties of the structure, and ultimately affect the service life of the structure. Therefore, it is...

AI Technical Summary

Problems solved by technology

However, a single detection method is often not conducive to the qualitative, locating and quantifying of defects.

For example, the penetration ultrasonic testing technology cannot determine the location and nature of defects in honeycomb structure parts; the emission ultrasonic testing technology can only detect the quality of honeycomb skin and bonding quality; the existing X-ray testing technology has overlapping and blurred images, and parts Curvature and placement angle will directly affect the clarity of the final image, which greatly increases the difficulty of radiographic detection of internal defects of the honeycomb—especially defects such as bulging, wrinkling, and debonding and deformation of the honeycomb core. Observe the honeycomb cells one by one Radiography also increases inspector hours

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