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A Piezoelectric Fiber-Based Impact Detection Method for Carbon Fiber Reinforced Composite Materials

A technology of reinforced composite materials and piezoelectric fibers, which is applied in the impact detection of materials, and in the field of impact detection of carbon fiber reinforced composite materials based on piezoelectric fibers, to achieve high reliability and high sensitivity

Active Publication Date: 2022-02-22
ZHEJIANG SCI-TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, fiber optics can be used for structure detection but require additional equipment to generate and analyze the signal

Method used

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  • A Piezoelectric Fiber-Based Impact Detection Method for Carbon Fiber Reinforced Composite Materials
  • A Piezoelectric Fiber-Based Impact Detection Method for Carbon Fiber Reinforced Composite Materials
  • A Piezoelectric Fiber-Based Impact Detection Method for Carbon Fiber Reinforced Composite Materials

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Embodiment Construction

[0027] Please refer to the attached figure 1 to attach image 3 As shown, the present invention is a carbon fiber reinforced composite impact detection method based on piezoelectric fibers, comprising the following process steps:

[0028] 1), prepare the piezoelectric fiber 9; specifically, it is necessary to adopt a piezoelectric fiber preparation device, which consists of a support 1, a copper needle 2, a piezoelectric polymer solution 3, an enameled wire 4 and a copper ring 5, etc. composition.

[0029] Wherein, the copper needle 2 and the copper ring 5 are fixed on the bracket 1 . The copper needle 2 is hollow, and a piezoelectric polymer solution 3 is injected into it. The middle of the copper needle 2 passes through the enameled wire 4 , and the enameled wire 4 passes through the mouth of the copper needle 2 and passes through the copper ring 5 . The piezoelectric polymer solution 3 uses DMF as a solvent and the piezoelectric polymer as a solute, and the mass content...

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Abstract

The invention relates to a method for detecting the impact of carbon fiber reinforced composite materials based on piezoelectric fibers, comprising the following steps: 1) preparing piezoelectric fibers; 2) weaving piezoelectric fibers and carbon fibers to form fabrics, and curing the fabrics to form composite materials Circular tube; 3), place the composite material circular tube horizontally and fix it with a fixture; the copper wire in the piezoelectric fiber is connected to the charge amplifier measurement end, the carbon fiber in the composite material circular tube is used as a common terminal, and the amplified voltage of each channel is measured in real time with a data acquisition card; 4 ), the impact hammer falls and impacts the composite material tube, the composite material tube deforms, and the piezoelectric fiber deformation in the corresponding direction produces a piezoelectric effect; the voltage generated by the piezoelectric effect is proportional to the deformation, through the charge amplifier, data Acquisition card, and read the data on the computer to realize the detection of impact. The invention can realize the impact detection of the carbon fiber reinforced composite material under the premise of ensuring that the mechanical properties of the carbon fiber reinforced composite material are not affected.

Description

【Technical field】 [0001] The invention relates to a material impact detection method, in particular to a piezoelectric fiber-based carbon fiber reinforced composite material impact detection method, which belongs to the technical field of material performance detection. 【Background technique】 [0002] Carbon fiber reinforced composites have good mechanical properties and are widely used in many fields. However, almost invisible impact damage is still a problem in practical applications. Composite materials are often subjected to low-speed impacts during use, resulting in reduced mechanical strength and prone to impact damage. Failure to detect and repair damage in time can have catastrophic consequences. [0003] In order to solve this problem, many nondestructive testing methods have been developed. Some non-destructive testing methods still have problems in their application. For example, fiber optics can be used for structure detection, but require additional equipmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/317
CPCG01N3/317G01N2203/001G01N2203/005G01N2203/0282
Inventor 程晓颖钱奕恺吴震宇胡旭东
Owner ZHEJIANG SCI-TECH UNIV
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