Abstract
The initial cause of the acoustic emission (AE) in the process of deformation and destruction of solids is considered. A theoretical analysis of the processes of transformation and energy dissipation during the destruction of structural bonds of an idealized solid model is carried out. The research of wave process arising in the deformation and rupture of fiber reinforced composites is conducted using AE system A-line32D and PCI-2, vibration analyzer Onix, high speed camera Videosprint and numerical simulation in the software LS-DYNA. The obtained experimental and calculated data showed that the main energy in the time interval after the fiber rupture is released in the range of audio frequencies less than 2 kHz. The peak values energy recorded in the ultrasonic frequency range does not exceed a few percent relative to the maximum level at the carrier frequency in the audio range.
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