Multi-factor evaluation method for lightning damage of carbon fiber composite material under action of single lightning current component
A composite material and lightning current technology, applied in the direction of analyzing materials, material analysis by electromagnetic means, measuring devices, etc., can solve the problems that hinder the research and performance improvement of carbon fiber composite materials formulation process, the lag in the evaluation method of lightning damage of carbon fiber composite materials, Restrictions on applications, etc.
Active Publication Date: 2019-05-17
XI AN JIAOTONG UNIV
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Problems solved by technology
[0006] However, the quantitative relationship between the lightning damage of carbon fiber composite materials and the peak value of the lightning current component, the rate of rise, the amount of charge transfer, the specific energy, and the action gap has not been obtained. , process research and performance improvement, thus restricting its application in the aerospace field
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[0044] The principle and calculation method of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0045] see figure 1 , is the RLC generating circuit of the non-destructive lightning current component of the present invention. In the figure, the controllable DC charging power supply 1 is composed of a voltage regulator T1, a transformer T2, a rectifier diode D, and a charging resistor R 2 Composition; switch S and resistor R 3 Constitute the energy storage capacitor safety discharge circuit; energy storage capacitor unit 2 (capacity C), discharge switch 3, waveform adjustment inductor 5 (inductance L), waveform adjustment resistor 4 (resistance value R), and form lightning current A component discharge circuit.
[0046] The following takes the A component of lightning current as an example to illustrate the adjustment method of the loop parameters of the nonlinear lightning current A component. Oth...
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Abstract
The invention discloses a multi-factor evaluation method for lightning damage of a carbon fiber composite material under an action of a single lightning current component. Lightning current amplitude,a rising rate, charge transfer quantity, specific energy quantity, and a working clearance distance are taken as influencing factors of the lightning damage of the carbon fiber composite material under the action of the single lightning current component, and in the end large sample experimental data of various influencing factors of lighting current component and a lighting damage area and damage depth of the carbon fiber composite material are obtained; on the basis, a multi-factor evaluation module of the lightning damage area and the damage depth of the carbon fiber composite material isestablished, influencing elements of multi-factors of the lightning damage area and the damage depth of the carbon fiber composite material are obtained, the influencing elements of the multi-factorsof the lightning damage area and the damage depth of the carbon fiber composite material and mathematical expressions of the influencing elements of the multi-factors of the lightning damage area anddamage depth of the carbon fiber composite material are obtained, a lightning damage mechanism of the carbon fiber composite material is explored, and a theoretical basis for the laminate formula andtechnological research of the carbon fiber composite material is provided.
Description
technical field [0001] The invention belongs to an evaluation method of lightning damage of carbon fiber composite materials, in particular to an evaluation method of multiple influencing factors of lightning damage of carbon fiber composite materials under the action of a single lightning current component. Background technique [0002] Carbon fiber composite materials not only have the characteristics of low density, high strength, high modulus, high temperature resistance, and chemical corrosion resistance, but also have the softness and processability of textile fibers. They are widely used in various fields such as aerospace, military and civil industries. With the improvement of aircraft design and the advancement of carbon fiber composite material technology, the use of carbon fiber reinforced polymer composite material CFRP (CarbonFiber Reinforced Polymers) in large civil aircraft, military aircraft, drones and stealth aircraft has continued to increase, from 1960 Th...
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IPC IPC(8): G01N27/00
Inventor 孙晋茹姚学玲陈景亮
Owner XI AN JIAOTONG UNIV