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Magnetic characteristic-based three-dimensional braided composite material health detection method

A composite material and three-dimensional weaving technology, applied in the direction of material magnetic variables, can solve problems such as plastic deformation, structural fracture, fiber fracture, etc., and achieve the effect of high reliability and sensitivity and wide application prospects

Pending Publication Date: 2019-09-24
XI'AN POLYTECHNIC UNIVERSITY
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AI Technical Summary

Problems solved by technology

[0003] During the use of three-dimensional braided composite materials, damages such as plastic deformation, fiber fracture, and structural fracture may occur. Some internal fiber fracture damage of composite materials is difficult to observe, and it is difficult to determine the specific location and degree of internal damage.

Method used

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  • Magnetic characteristic-based three-dimensional braided composite material health detection method
  • Magnetic characteristic-based three-dimensional braided composite material health detection method

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Embodiment Construction

[0028] In describing the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", The orientation or positional relationship indicated by "outside" is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, Constructed and operative in a particular orientation and therefore are not to be construed as limitations of the invention.

[0029] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] Such as figure 1 , figure 2 As shown, a three-dimensional braided composite material health detection method based on magnetic properties is characterized in that it includes the following steps:

[0031]...

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Abstract

The invention discloses a magnetic characteristic-based three-dimensional braided composite material health detection method. The method includes the following steps that: in the braiding process of a three-dimensional braided composite material, a magnetic fiber bundle is added; the magnetic characteristics of a magnetic three-dimensional braided composite material reference sample under different states in a three-dimensional direction are detected and calibrated; and the magnetic characteristics of a to-be-tested sample under a to-be-detected state are compared with the magnetic characteristics of the reference sample, so that whether the magnetic three-dimensional braided composite material is damaged can be detected, if the magnetic three-dimensional braided composite material is damaged, the position and degree of the damage of the material are determined according to the magnetic characteristics in the magnetic three-dimensional direction. With the method disclosed by the invention adopted, whether the magnetic three-dimensional braided composite material is damaged or not can be detected accurately, conveniently and rapidly, and the position and degree of the damage of the material can be determined. The method has a wide application prospect in the health monitoring direction of the three-dimensional braided composite material.

Description

technical field [0001] The invention relates to the field of health detection of composite materials, in particular to a method for health detection of three-dimensional braided composite materials based on magnetic properties. Background technique [0002] The three-dimensional braided composite material fiber bundles interweave in space to form a three-dimensional network structure, which overcomes the weakness of traditional laminates that are easy to delaminate, maintains the integrity of the composite material to build load-bearing deformation, and has high specific strength, large specific modulus, and impact resistance. , performance can be designed and easy one-time molding, etc., it satisfies the requirements of material structure weight reduction and high load-bearing performance in the aerospace field, and is widely used in aviation, aerospace, military and other fields. [0003] During the use of three-dimensional braided composite materials, damages such as plas...

Claims

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Application Information

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IPC IPC(8): G01N27/83
CPCG01N27/83
Inventor 殷俊清顾金芋陈永当程云飞赵诚诚
Owner XI'AN POLYTECHNIC UNIVERSITY
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