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Non-Extensive Statistical Analysis of Acoustic Emissions: The Variability of Entropic Index q during Loading of Brittle Materials until Fracture

Andronikos Loukidis, Dimos Triantis, Ilias Stavrakas
2021 Entropy  
loaded specimens of brittle materials.  ...  Non-extensive statistical mechanics (NESM), introduced by Tsallis based on the principle of non-additive entropy, is a generalisation of the Boltzmann–Gibbs statistics.  ...  The presented experiments were conducted at the Laboratory for Testing and Materials, Department of Mechanics of the National Technical University of Athens.  ... 
doi:10.3390/e23030276 pmid:33668775 pmcid:PMC7996186 fatcat:okqoju5mefaydef32ycfvirvli

Non-Extensive Statistical Analysis of Acoustic Emissions Recorded in Marble and Cement Mortar Specimens Under Mechanical Load Until Fracture

Andronikos Loukidis, Dimos Triantis, Ilias Stavrakas
2020 Entropy  
In this study, NESM is used for the analysis of the acousticemission (AE) events recorded when marble and cement mortar specimens were subjected tomechanical loading until fracture.  ...  Non-extensive statistical mechanics (NESM), which is a generalization of the traditionalBoltzmann-Gibbs statistics, constitutes a theoretical and analytical tool for investigating theirreversible damage  ...  Kourkoulis for providing the AE data of the presented experiments which were conducted at the Laboratory for Testing and Materials, Department of Mechanics of the National Technical University of Athens  ... 
doi:10.3390/e22101115 pmid:33286884 pmcid:PMC7597240 fatcat:nsp7ud44pnckvbm4ozzzt5nkmy

Acoustic Emission Analysis of Cement Mortar Specimens During Three Point Bending Tests

I. Stavrakas, D. Triantis, S.K. Kourkoulis, E.D. Pasiou, I. Dakanali
2016 Latin American Journal of Solids and Structures  
Acknowledgements This research has been co-financed by the European Union (European Social Fund -ESF) and Greek national funds through the Operational Program "Education and Lifelong Learning" of the National  ...  Investing in knowledge society through the European Social Fund.  ...  Within the nonextensive thermostatistics formulation, which will be used for the analysis of AE evolution, an entropic index q exists which expresses the degree of non-additivity.  ... 
doi:10.1590/1679-78252486 fatcat:nzbnkjxh2rchdpw45lgst5mx5q

The use of acoustic emissions technique in the monitoring of fracturing in concrete using soundless chemical demolition agent

Vassilios Saltas, Despoina Peraki, Filippos Vallianatos
2019 Frattura ed Integrità Strutturale  
The distribution of the inter-event times of the recorded hits is further analyzed in the context of non-extensive statistical physics.  ...  However, the knowledge of the governing fracture mechanisms in brittle materials is rather limited.  ...  ACKNOWLEDGEMENTS e acknowledge support of this work by the project ''HELPOS -Hellenic System for Lithosphere Monitoring, Greece'' (MIS 5002697) which is implemented under the Action ''Reinforcement of  ... 
doi:10.3221/igf-esis.50.42 fatcat:rsuywdj3bjfy7kxwphgtsk2jtm

A multidisciplinary analysis for traces of the last state of earthquake generation in preseismic electromagnetic emissions

S. M. Potirakis, G. Minadakis, C. Nomicos, K. Eftaxias
2011 Natural Hazards and Earth System Sciences  
Fracture induced electromagnetic (EM) fields allow real-time monitoring of damage evolution in materials during mechanical loading.  ...  The analysis indicates that the launch of the EM precursor is combined with the appearance of a significantly higher level of organization, which is an imprint of a corresponding higher level of organization  ...  The authors would like to thank the reviewers for their constructive comments and suggestions. Edited by: M. E. Contadakis Reviewed by: N. Gershenzon and T. Chelidze  ... 
doi:10.5194/nhess-11-2859-2011 fatcat:r3eowk5gsfb5rjauwmmz6zbkga

Macroscopic crack propagation in brittle heterogeneous materials analyzed in Natural Time [article]

N. V. Sarlis, E. S. Skordas, P. A. Varotsos
2018 arXiv   pre-print
Here, we analyze in natural time χ, the slow propagation of a macroscopic crack in brittle heterogeneous materials through sudden jumps and energy release events which are power law distributed with universal  ...  This sheds light on the determination of the occurrence time of an impending mainshock.  ...  Such complex dynamics, also called 'crackling noise' [10] , is suggested from the acoustic emission that accompanies the failure of various materials (e.g. see Ref.  ... 
arXiv:1704.01057v5 fatcat:dycuc7rq55a23nxc5tkbu6vpyy

Collective behavior of earthquakes and faults: Continuum-discrete transitions, progressive evolutionary changes, and different dynamic regimes

Yehuda Ben-Zion
2008 Reviews of Geophysics  
The first is 18 associated with broad range of heterogeneities, little 19 dynamic weakening, power law frequency-size statistics, 20 temporal clustering of intermediate and large events, and 21 accelerated  ...  The 22 second is associated with relatively uniform localized 23 structures, significant dynamic weakening, characteristic 24 earthquake statistics, and quasi-periodic temporal 25 occurrence of large events  ...  The static friction characterizes the 2765 brittle strength of a cell until its initial failure in a given 2766 model earthquake.  ... 
doi:10.1029/2008rg000260 fatcat:klrxfxo4w5bgzlkn4qiiwtltyi

Multiscale-failure criteria of carbon nanotube systems under biaxial tension–torsion

Byeong-Woo Jeong, Jang-Keun Lim, Susan B Sinnott
2007 Nanotechnology  
The results are analysed using Weibull statistics, and the dependence of the statistical distribution of fracture strengths on defect concentration is established.  ...  Through a stability analysis of crack-tip bond separation, the athermal ͑nonthermally activated͒ loads of instantaneous fracture are determined, thereby yielding the estimated lattice trapping range.  ...  One of the authors ͑R.S.R.͒ appreciates support from the NASA University Research, Engineering and Technology Institute on Bio Inspired Materials ͑BIMat͒ under Award No. NCC-1-02037.  ... 
doi:10.1088/0957-4484/18/48/485715 fatcat:leh6psovozdxjen2luaf6gzvda

Deformation and flow of amorphous solids: Insights from elastoplastic models

Alexandre Nicolas, Ezequiel E. Ferrero, Kirsten Martens, Jean-Louis Barrat
2018 Reviews of Modern Physics  
with respect to criticality at the yielding point and the statistics of avalanches of plastic events.  ...  too loaded.  ...  ACKNOWLEDGMENTS The authors acknowledge financial support from ERC grant ADG20110209 (GLASSDEF). E.E.  ... 
doi:10.1103/revmodphys.90.045006 fatcat:h45igmigzveunmw2v6r2tdger4

Report to the American Physical Society by the study group on research planning for coal utilization and synthetic fuel production

Bernard R. Cooper, Wayne R. Gruner, Larry Anderson, Robert H. Davis, Paul Engelking, Jose D. Garcia, Edward Gerjuoy, Robert I. Jaffee, Philip G. Kosky, Leonidas Petrakis, Robert T. Poe, Richard Pollina (+10 others)
1981 Reviews of Modern Physics  
Although the Panel was aware of the impor tance of environmental ef feets in coal utilization, we have not dealt with quest, ions of environmental impact.  ...  The technical topics we have treated rather deal with monitoring and controlling such emissions. ) Such topics form research areas of their own and require considerations differing in generic as well as  ...  Cracks forming at points of stress concentration are not easily blunted by yielding of the surround ing material and will tend to propagate in the brittle fracture failure mode.  ... 
doi:10.1103/revmodphys.53.s1 fatcat:3ver7ppwjfbv7mhbswvbeccqyu

Liprotides: a New Class of Protein Lipid-Complexes

Jannik N. Pedersen, Henriette Kristina S. Frislev, Jan S. Pedersen, Daniel E. Otzen
2016 Biophysical Journal  
Q (~ 0.0003 Å -1 ).  ...  SasCal is available in the atomistic scattering analysis package SASSIE [3]  ...  the measurement capabilities for routine measurements with lower scattering wave vector resolution in SAXS (q min ) or for screening of material processing parameters during insitu analysis.  ... 
doi:10.1016/j.bpj.2015.11.3085 fatcat:eqeeb47atfc4lisnurb25n55gu

Cell Micro-patterning [chapter]

2016 Encyclopedia of Nanotechnology  
Dc-contact switches function similarly to conventional relays: micromachined beams or plates move under the influence of an appropriately applied force (e.g., electrostatic force) to open or close a metal-to-metal  ...  Overview Capacitive and direct current (dc)-contact MEMS switches are among the most important micromachined devices for high-frequency applications due to their near-ideal RF performance.  ...  (AlCu) is often treated as a lossy acoustic material.  ... 
doi:10.1007/978-94-017-9780-1_100152 fatcat:msyahfwivvcxhol3nltwdi546e

Chemical Vapor Deposition (CVD) [chapter]

Yoke Khin Yap, Dongyan Zhang
2016 Encyclopedia of Nanotechnology  
Dc-contact switches function similarly to conventional relays: micromachined beams or plates move under the influence of an appropriately applied force (e.g., electrostatic force) to open or close a metal-to-metal  ...  Overview Capacitive and direct current (dc)-contact MEMS switches are among the most important micromachined devices for high-frequency applications due to their near-ideal RF performance.  ...  (AlCu) is often treated as a lossy acoustic material.  ... 
doi:10.1007/978-94-017-9780-1_345 fatcat:hqqkocm2sne5jp32r7akdjceyi

Nanosecond Tuning In Microwave Resonators Fabricated On Ruddlesden-Popper Thin Films

A.M. Hagerstrom, X. Lu, N.M. Dawley, H. Nair, Jordi Mateu, J.C. Booth, C.J. Long, D.G. Scholm, N. Orloff
2017 Zenodo  
This volume contains abstracts for more than 400 presentations during the Electronic Materials and Applications 2017 in Orlando, Florida.  ...  An Author Index appears at the back of this book. The Meeting Guide contains locations of sessions with times, titles and authors of papers, but not presentation abstracts.  ...  In this talk, I will introduce to the materials researcher the alternative statistical framework of Bayesian statistics and its application to analysis of diffraction data when employed in conjunction  ... 
doi:10.5281/zenodo.1155779 fatcat:oczwziam2bar7dpe7r7yybcu3y

Atomistic and continuum studies of deformation and failure in brittle solids and thin film systems [article]

Markus J. Buehler, Universität Stuttgart, Universität Stuttgart
2004
The second part is dedicated to joint continuum-atomistic modeling of dynamic fracture of brittle materials, where we employ one-, two- and three-dimensional models.  ...  An important point of interest is the role that material nonlinearities play in the dynamics of fracture. The elasticity of a solid clearly depends on its state of deformation.  ...  Brittle fracture 69 Modeling of brittle materials failure As schematically visualized in Figure 3 .1, brittle fracture is a complex multiscale process.  ... 
doi:10.18419/opus-6537 fatcat:uapys4pip5b33bm5u5um3ch77u
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