Detection method and test device for impact damage of composite material laminate

A technology of composite material layer and impact damage, which is applied in the direction of impact test, measuring device, machine/structural component test, etc. It can solve the problems of not being able to give the impact energy size, long time, and long time, and achieve strong anti-interference ability , good robustness, good recognition effect

Active Publication Date: 2013-01-09
BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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Problems solved by technology

However, there are such shortcomings: the method of ultrasonic C-scan takes a long time, especially for the detection of large-area damage. It is an offline monitoring method. Although the scan results can give the size and shape of the damage area, it cannot give The conclusion of impact energy
X-ray technology is also an off-line monitoring method, which can only give the size and shape of the damaged area, but cannot give the conclusion of the impact energy

Method used

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  • Detection method and test device for impact damage of composite material laminate
  • Detection method and test device for impact damage of composite material laminate
  • Detection method and test device for impact damage of composite material laminate

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Embodiment Construction

[0031] The present invention will be described in detail below with reference to the accompanying drawings.

[0032] like figure 1 , figure 2 As shown, the test device includes a composite material laminate 1, a fiber grating strain sensor 2, a transmission fiber 3, a fiber grating demodulation instrument 4, data storage and analysis software 5, a computer 6, and an impact device 7; wherein, the impact device 7 includes a track The fixed bracket 8, the falling track 9, the fixed base 10, the falling mass block 11 and the impact head 12; the size of the composite material laminate 1 is: 150mm long, 100mm wide and 4mm thick. The composite material laminate 1 is made of CCF300 fiber and 5228A resin, and its layup method is [45 / 0 / -45 / 90] 4s. Such a composite material laminate 1 may be the skin material of an aircraft structure.

[0033] The drop rail 9 is installed on the fixed bracket 8 , the fixed base 10 is placed directly under the impact head 12 , the falling mass block 1...

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Abstract

The invention relates to a detection method and a test device for an impact damage of a composite material laminate, belonging to the technical field of health monitoring of composite materials. The device comprises the composite material laminate (1), a fiber grating strain sensor (2), a transmission fiber (3), a fiber grating demodulation instrument (4), data storage and analysis software (5), a computer (6) and an impact device (7), wherein the impact device (7) comprises a track fixing bracket (8), a falling track (9), a fixed base (10), a falling mass block (11) and an impact head (12). According to the invention, the online monitoring can be implemented, and the detection result of the size of the impact energy can be acquired. The method provided by the invention can provide the detection result of a former impact position even if no damage is caused by the impact; and however, the ultrasonic C-scan method and the X-ray method cannot locate the impact position under the same situation.

Description

technical field [0001] The invention relates to a composite material laminate impact damage identification method and a testing device, belonging to the technical field of composite material structure health monitoring. Background technique [0002] With the increase in the application of composite materials in various structures (such as aircraft structures, wind power blade structures, civil building structures, bridge structures, etc.) The research and application of structural damage identification technology has been paid more and more attention. At present, the commonly used technologies for damage detection of composite materials are ultrasonic C-scan technology and X-ray technology. Both techniques can give images of damaged parts of composite structures, and the results are more intuitive. However, there are such shortcomings: the ultrasonic C-scan method takes a long time, especially for large-area damage detection, which is an offline monitoring method. Although...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/08
Inventor 王利恒张力
Owner BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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