Acoustic emission device and method for detecting destructive failure of carbon fiber composite material
A composite material, acoustic emission technology, applied in the direction of material analysis using acoustic emission technology, can solve the problems of expensive equipment, low sensitivity of small defects, inclusions, etc., to achieve the effect of simple operation, continuous real-time signal feedback, and high sensitivity
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[0034] Example
[0035] The method for detecting failure and failure of the carbon fiber composite material by acoustic emission includes the following steps:
[0036] 1. Determination and installation of sensor spacing
[0037] The pencil lead simulating acoustic emission signal device determines the distance between the two sensors. The two sensors are fixed on the surface of the carbon fiber composite material, and the coupling agent is filled between the sensor and the carbon fiber composite material to be measured, so that there is a good acoustic coupling between the two. The coupling agent may be petroleum jelly, but is not limited thereto.
[0038] 2. Obtain the acoustic emission signal of composite material failure
[0039] Use electro-hydraulic servo material testing system (MTS810-25ton) to match [0o / 90o], [45o / -45o], [0o / 45o / 90o / -45o] and [90o / 45o / 0o / -45o], etc. Laminate samples with different opening angles and different opening sizes were subjected to tensile tests, and ...
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