Features of the Amplitude-Frequency Characteristics of Electromagnetic Emission during Uniaxial Compression of Dielectric Composites

International Scientific Conference on "Radiation-Thermal Effects and Processes in Inorganic Materials"

材料科学;物理学

Surzhikov, V.P.^1 ; Khorsov, N.N.^1

Tomsk Polytechnic University, Tomsk

634050, Russia^1

关键词: Amplitude frequency characteristics;    Dielectric composites;    Electrical components;    Electromagnetic emissions;    Normal vibrations;    Spectral signal;    Ultrasonic pulse;    Uni-axial compression;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/81/1/012060/pdf
DOI  :  10.1088/1757-899X/81/1/012060

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

We have studied the electromagnetic emission from samples of epoxy resin filled with sand subjected to uniaxial compression. Capacitive sensor measures the electrical component of the response when excited electromagnetic emission of ultrasonic pulse using a differential amplifier. It was shown the influence of the load on the spectral signal characteristics: with increasing pressure, the formation of bands at frequencies corresponding to possibly quasi-Rayleigh waves generation. It is concluded that the use of the experimental geometry studies the main contribution to the response of electromagnetic emissions create born normal vibrations, which are damped standing waves.