Experiment of dynamic property and transient magnetic effects of coal during deformation and fracture

Autor:	Dong-ji Lei, Shan-yang Wei, Xue-ying Wang, Cheng-wu Li, Ji-kun Liu
Rok vydání:	2012
Předmět:	Materials science business.industry Drop (liquid) Fast Fourier transform Energy Engineering and Power Technology Mechanics Geotechnical Engineering and Engineering Geology Instantaneous phase Jump Waveform Geotechnical engineering Coal Transient field business
Zdroj:	Journal of Coal Science and Engineering (China). 18:258-261
ISSN:	1866-6566 1006-9097
DOI:	10.1007/s12404-012-0306-6
Popis:	Combining separated SHPB test device of ϕ50 mm with ZDKT-type 1 transient magnetic resonance test system, long drop bar of 400 mm was used to impact coal specimens at four different speeds: 1.275, 3.287, 6.251, and 7.404 m/s. The change in waveform, the dynamic mechanical properties, and the generated effect of transient field during the coal deformation and fracture under the loads were discussed and analyzed. While magnetic signals during the coal fracture firstly needed EEMD, decomposition then had a FFT with Data Demon. The main results of the experiment are the following: the main frequency of magnetic signals was between 220 and 450 kHz and the instantaneous frequency during the damage of coal would have the instantaneous jump.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::30ff48f46a5fe6f9ad8905a5d67f6943 https://doi.org/10.1007/s12404-012-0306-6 Zobrazit plný text záznamu Full text from SpringerLink