Electrical and Acoustic Emissions in cement mortar beams subjected to mechanical loading up to fracture |
| |
| Affiliation: | 1. Laboratory of Electrical Characterization on Materials and Electronic Devices, Department of Electronics, Technological Educational Institute of Athens, Athens 12210, Greece;2. Laboratory of Geophysics and Seismology, Technological Educational Institute of Crete, Chania, Greece;1. Key Laboratory of Gas and Fire Control for Coal Mines (China University of Mining and Technology), Ministry of Education, Xuzhou 221116, China;2. School of Safety Engineering, China University of Mining and Technology, Xuzhou 221116, China;3. Department of Civil, Environmental, and Geo-Engineering, University of Minnesota, Minneapolis, MN 55455, USA;1. State Key Laboratory of Coal Mine Disaster Dynamics and Control, College of Resources and Environmental Science, Chongqing University, Chongqing 400044, China;2. Key Laboratory of Gas and Fire Control for Coal Mines, National Engineering Research Center of Coal Gas Control, School of Safety Engineering, China University of Mining and Technology, 221116 Xuzhou, Jiangsu, China;3. School of Safety Engineering, North China Institute of Science & Technology, Langfang 101601, China;4. State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Henan Polytechnic University, Jiaozuo 454000, China;1. State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China;2. College of Ming and Safety Engineering, Shan Dong University of Science and Technology, Qingdao 266590, China;1. LMC2, Université Claude Bernard Lyon 1 (Laboratoire des Matériaux Composites pour la Construction), France;2. Université de Sherbrooke, Faculté de génie, France |
| |
| Abstract: | The application of mechanical loading on cement-based materials generates weak electrical currents due to the formation and propagation of microfractures. This paper introduces the simultaneous recording of electrical signal emissions know as Pressure Stimulated Currents (PSCs) and Acoustic Emissions (AEs) detected in cement mortar beams of rectangular cross-section subjected to mechanical loading using the Three Point Bending tests. The rate of the applied load during the experiments was constant up to the fracture of the specimen. The characteristics of the AE and PSC were put in contrast in order to better understand the evolution of the microfracture processes up to fracture. Specifically, the recorded PSC and AE were studied in terms of their time series, cumulative energy along with AE rate and AE interevent times that may provide information about the upcoming specimen fracture. Moreover, non-extensive statistical physics modeling was attempted in terms of studying the Tsallis entropy. Specifically, the entropic index q was calculated and its dependence on the applied mechanical load was investigated. |
| |
| Keywords: | Acoustic Emission Failure diagnostics Non-destructive testing Mechanical testing Probability |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
