Device and method for measuring impact force of carbon fiber composite materials
A technology of composite materials and measuring devices, applied in measuring devices, force/torque/work measuring instruments, measuring electricity, etc., can solve the problems of not too many researches on damage and damage effects, and achieve the effect of filling the technical gap
Active Publication Date: 2017-10-20
XI AN JIAOTONG UNIV
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Problems solved by technology
The American Society of Mobile Engineers SAE, the American military standard MIL STD and the European Civil Aviation Organization EUROCAE have made detailed regulations on the test waveform and test method of the direct effect of lightning on the aircraft and its components, but the impact of carbon fiber composite laminates under the action of lightning There are not many studies on damage and destruction effects caused by force
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[0023] The present invention is described in further detail below in conjunction with accompanying drawing:
[0024] see Figure 1-3 : The present invention at first proposes a kind of impact force measuring device of carbon fiber composite material, comprises pulse power supply 1, tested carbon fiber composite material laminated plate 2, piezoelectric sensor 3, piezoelectric signal processing unit 4, pulse current detection unit 5 and computer control With the analysis and processing unit 6; the high-voltage output end of the pulse power supply 1 is connected with the metal rod-shaped electrode 12, and the metal rod-shaped electrode 12 is perpendicular to the surface of the tested carbon fiber composite material laminate 2 and is facing the center of the tested carbon fiber composite material laminate 2 and There is a certain distance from the center (the distance can be adjusted), and the other end surface of the carbon fiber composite laminate 2 to be tested is connected to...
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Abstract
The invention discloses a device and method for measuring the impact force of carbon fiber composite materials. The impact voltage or impact strength of the controllable intensity pulse power supply of the invention is controlled by an industrial control computer through a programmable controller. The pulse current of the carbon fiber composite laminate is sampled by the voltage sensor and the pulse current detection unit, collected by the oscilloscope, and then transmitted to the computer control and analysis processing unit. The piezoelectric signal processed by the piezoelectric signal processing unit is input to the A / D data acquisition system and the analog-to-digital conversion result is transmitted to the computer control and analysis processing unit. The computer processes and analyzes the received data to obtain the relationship between the impact voltage and the impact current flowing through the tested carbon fiber composite laminate and the deformation or impact force of the tested carbon fiber composite laminate. relationship law.
Description
technical field [0001] The invention belongs to the technical field of material testing, and relates to the measurement of a carbon fiber composite material, in particular to a method and a measurement device for measuring the impact force of a carbon fiber composite material under the action of lightning. 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 The ...
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IPC IPC(8): G01L5/00G01R31/00
Inventor 姚学玲陈景亮孙晋茹
Owner XI AN JIAOTONG UNIV