Predicting fracture of mortar beams under three-point bending using non-extensive statistical modeling of electric emissions

Stergiopoulos, Ch.; Triantis, Dimos; Vallianatos, Filippos; Stonham, John

doi:10.1016/j.physa.2014.10.060

Cited by 29 publications

(14 citation statements)

References 39 publications

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“…However, the amount of agglomeration is limited, causing the decrease of the D-value to slow down as the stress increases, as shown in Figure 11. This phenomenon is in agreement with the results obtained in non-extensive statistical physics for similar experiments where fractal geometry is present [43] and with results on the planetary scale [44,45].…”

Section: Discussionsupporting

confidence: 92%

Loading Capacity and Deformation Characteristics of Tailings Based on a Fractal Geometrical Analysis of the Particle Microstructure

et al. 2015

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Abstract:The failure of a tailing dam occurs due to damage to the particles' micro-structure. Understanding the deformation characteristics of the particle' micro-structure is important for understanding the mechanics of instability in tailing dams. In our study, a series of experiments was conducted using a testing apparatus for micro-mechanics and the deformation of tailings from the Huangcaoping tailing pond, Sichuan Province, China to investigate the loading capacity, micro-structure and deformation features of tailing particles. The latter two were analyzed quantitatively using concepts from fractal geometry. The results demonstrate that: (1) the structural loading capacity of tailings increases first and then decreases slightly with increasing particle size; (2) the particle micro-structure of the four tailing samples from the Huangcaoping tailing pond is described in terms of the fractal dimension based on the perimeter and area (D-value), which is between 1.288 and 1.533; (3) as the axial stress increases, the D-value gradually decreases along a wavy line with a decreasing rate of change; (4) under the same axial strain, the D-value first OPEN ACCESSMinerals 2015, 5 87 decreases and later increases slightly as the particle size increases; and (5) the number of fractured particles increases with the particle size.

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Section: Discussionsupporting

confidence: 92%

Loading Capacity and Deformation Characteristics of Tailings Based on a Fractal Geometrical Analysis of the Particle Microstructure

et al. 2015

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“…The main difference is that the PSC recorded from cement‐based materials is significantly stronger compared with that from marble, reaching amplitudes at the nanoamperes scales . Moreover, experiments with specimens made of cementitious materials under 3‐point bending indicated that the PSC provides valuable information regarding the proximity to the ultimate stress level (fracture) …”

Section: The Experimental Protocol and The Sensing Techniquesmentioning

confidence: 99%

Notched marble plates under tension: Detecting prefailure indicators and predicting entrance to the “critical stage”

Kourkoulis

Pasiou

Dakanali

et al. 2017

Fatigue Fract Eng Mat Struct

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The potentialities of the pressure stimulated currents technique to be used as a continuous structural health monitoring tool in applications related to stone monuments are assessed experimentally. The data gathered by this technique from experiments with notched marble plates submitted to direct tension are considered in juxtaposition to the respective ones provided by the acoustic emissions technique, a well‐founded and widely used sensing tool. The time evolution of the pressure stimulated currents produced provides clearly distinguishable fingerprints of upcoming fracture well before visible cracking is macroscopically observed. These fingerprints are in good qualitative agreement with similar ones provided by the acoustic emissions, and therefore, they can be considered as safe prefailure indicators designating entrance to a “critical stage.” Thus, the use of the pressure stimulated currents technique as an alternative structural health monitoring system appears quite promising, taking also into account the low cost and the small size of the respective sensors.

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“…However, the PSC recorded is significantly stronger than that in rocks, reaching amplitudes at the nA scale. Moreover, recent experiments with prismatic specimens made either of marble or mortar and subjected to 3PB revealed that proper evaluation of the electric current emission recordings may provide useful information regarding the proximity of the applied mechanical load to the ultimate stress level of the specimens (Stergiopoulos et al, 2015).…”

Section: The Materials and The Specimensmentioning

confidence: 99%

“…The specific point indicates the generation of a local macro-crack which interrupts instantaneously the local electric paths. From this point on, it is considered that the system (specimen) entered its "critical stage", and final fracture is impending (Stergiopoulos et al, 2015;Triantis et al, 2012).…”

Section: Fracture Characteristics Of Dionysos Marble Under 3pbmentioning

confidence: 99%

Mechanical response of notched marble beams under bending versus acoustic emissions and electric activity

Kourkoulis

Pasiou

Dakanali

et al. 2018

jtam

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An experimental protocol, including the combined application of both innovative and traditional sensing techniques, is described aiming to explore the mechanical response of marble and also to check the possibilities of detecting precursor phenomena designating upcoming catastrophic fracture. The protocol consisted of three-point bending tests with notched prismatic beams made of Dionysos marble, the material extensively used for restoration of the Acropolis of Athens monuments. The sensing system improvised included techniques relying on completely different physical foundations, which permit simultaneous detection and recording of the Pressure Stimulated Currents, Acoustic Emissions, three dimensional displacement fields and Notch Mouth Opening Displacements. Analysis of the results revealed interesting features of the mechanical response of Dionysos marble and indicated, also, that classical Continuum Fracture Mechanics fails to describe accurately the response of marble, at least in the presence of notches. In addition, strong correlations between the Pressure Stimulated Currents, the rate of acoustic hits and the rate of change of the opening of the pre-existing notch have been enlightened. Moreover, the onset of catastrophic crack propagation appears following distinguishable changes of the Pressure Stimulated Currents recorded. Therefore (and taking into account the very small size of the respective sensors as well as the simple complementary equipment needed), it is concluded that the specific technique could be considered as a simple and reliable tool for an alternative approach to the in-situ Structural Health Monitoring of classical stone monuments.

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Predicting fracture of mortar beams under three-point bending using non-extensive statistical modeling of electric emissions

Cited by 29 publications

References 39 publications

Loading Capacity and Deformation Characteristics of Tailings Based on a Fractal Geometrical Analysis of the Particle Microstructure

Loading Capacity and Deformation Characteristics of Tailings Based on a Fractal Geometrical Analysis of the Particle Microstructure

Notched marble plates under tension: Detecting prefailure indicators and predicting entrance to the “critical stage”

Mechanical response of notched marble beams under bending versus acoustic emissions and electric activity

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