Ultrasonic testing method used for composite material foaming structures

A foam structure and composite material technology, which is applied in the analysis of solids using sonic/ultrasonic/infrasonic waves, can solve the problems of difficulty in detecting defects at the interface of foam bonding, low detection efficiency, and difficulty in determining defects.

Active Publication Date: 2015-10-28
AVIC COMPOSITES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Theoretically, currently feasible non-destructive testing methods are: (1) soft X-ray testing method, the main disadvantages of which are: 1) it is difficult to detect the defects of the foam bonding interface perpendicular to the X-ray beam orientation; 2) the detection efficiency Low cost, high cost, and special radiation protection are required; (2) The main disadvantage of conventional ultrasonic testing methods is that the sound waves attenuate sharply in the foam structure, making it difficult for the incident sound waves to propagate effectively in the foam,

Method used

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  • Ultrasonic testing method used for composite material foaming structures
  • Ultrasonic testing method used for composite material foaming structures
  • Ultrasonic testing method used for composite material foaming structures

Examples

Experimental program
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Effect test

Embodiment 1

[0142] Choose the UPowr-1, UPower-2 and MUT-1 ultrasonic testing equipment produced by AVIC Composite Materials Co., Ltd. and the FJ-1 high-resolution ultrasonic transducer and high-energy transducer, respectively adopt water film coupling and high viscosity coupling The agent has carried out a series of practical testing applications on the overall foam structure of various composite materials. Among them, the size of the composite foam structure ranges from 100×500mm to 500×5000mm, and the thickness of the foam ranges from 20mm to 100mm.

[0143] Detection of Integral Foam Structure of Composite Materials

[0144] Place the overall foam structure of the composite material to be tested on the workbench, select the frequency of the transducer to be 1 MHz, and use MUT-1 ultrasonic testing equipment for detection, by moving the transmitting transducer 1 located on both sides of the overall foam structure of the composite material to be tested and receiving transducer 2, and ensu...

Embodiment 2

[0149] Choose the UPowr-1, UPower-2 and MUT-1 ultrasonic testing equipment produced by AVIC Composite Materials Co., Ltd. and the FJ-1 high-resolution ultrasonic transducer and high-energy transducer, respectively adopt water film coupling and high viscosity coupling The agent has carried out a series of practical testing applications on a variety of composite multilayer foam structures. Among them, the size of the composite multilayer foam structure ranges from 200×500mm to 500×5000mm, and the foam consists of two layers of foam glued together by adhesives. Made, the thickness of the foam ranges from 10mm-80mm,

[0150] Inspection of Multilayer Foam Structure of Composite Materials

[0151]Place the multi-layer foam structure of the composite material to be tested on the workbench, select the frequency of the transducer to be 0.5MHz, and use the MUT-1 ultrasonic testing equipment for detection. Transducer 1 and receiving transducer 2, and ensure that the transmitting transdu...

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Abstract

The invention belongs to the technical field of non-destructive testing and relates to an ultrasonic testing method used for composite material foaming structures. According to the method, ultrasonic waves formed by a large number of shock pulse waves in the composite material foaming structures are utilized, and by constructing transfer functions of the ultrasonic waves in the composite material foaming structures, the arithmetical relationship between the ultrasonic waves and different part defects of the composite material foaming structures is set up to carry out defect discriminating and ultrasonic testing; the shock pulse ultrasonic waves of different types, intensities and frequencies and ultrasonic testing achieving methods can be selected, and the different composite foaming structures can be tested in an ultrasonic mode. Actual testing results show that the sensitivity, the resolution and the ability of composite material foaming structure testing are remarkably improved, the defects and the combination conditions of skin, skin/foam cementing areas, foam/foam cementing areas and foam areas can be tested accurately, the testing reliability is greatly improved, and the foam testing thickness can be 100 mm.

Description

technical field [0001] The invention belongs to the technical field of non-destructive testing and relates to an ultrasonic testing method for composite material foam structures. Background technique [0002] Composite foam structure, as an ultra-light structure, has been widely used in aerospace, transportation and other industrial fields. By selecting different composite materials and foam materials, and designing foam bonding processes with different shapes and thicknesses, it is possible to manufacture various types of structures. Composite foam structure. In order to improve the process of composite foam structure and ensure the quality of composite foam structure, non-destructive testing of composite foam structure is usually required. At present, the foam structures that need to be tested non-destructively can be divided into two categories, such as figure 2 Shown: One type is that the foam is directly bonded to the composite skin to form various composite foam stru...

Claims

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Application Information

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IPC IPC(8): G01N29/07
Inventor 刘松平刘菲菲李乐刚白金鹏
Owner AVIC COMPOSITES
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