Search Results - "TRIANTIS, D"

Hidden Affinities Between Electric and Acoustic Activities in Brittle Materials at Near-Fracture Load Levels by Triantis, D., Pasiou, E. D., Stavrakas, I., Kourkoulis, S. K.

“…The time evolution of the electric activity in brittle materials, mechanically loaded at levels approaching the ones causing catastrophic fracture, is studied…”
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Natural time analysis of acoustic emissions before fracture: Results compatible with the Bak-Tang-Wiesenfeld model by Loukidis, A., Perez-Oregon, J., Pasiou, E. D., Kourkoulis, S. K., Sarlis, N. V., Triantis, D.

“…Abstract Natural time analysis has been recently applied for the elaboration of data recorded by means of the Acoustic Emission (AE) sensing technique while…”
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Notched marble plates under direct tension: Mechanical response and fracture by Kourkoulis, S.K., Pasiou, E.D., Dakanali, I., Stavrakas, I., Triantis, D.

“…•Direct tension, bending and Brazilian tests provide different tensile strength.•The axial stress-strain curve of Dionysos marble strongly deviates from…”
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Predicting fracture of mortar beams under three-point bending using non-extensive statistical modeling of electric emissions by Stergiopoulos, Ch, Stavrakas, I., Triantis, D., Vallianatos, F., Stonham, J.

“…Weak electric signals termed as “Pressure Stimulated Currents, PSC” are generated and detected while cement based materials are found under mechanical load,…”
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Notched marble plates under tension: Detecting prefailure indicators and predicting entrance to the “critical stage” by Kourkoulis, S.K., Pasiou, E.D., Dakanali, I., Stavrakas, I., Triantis, D.

“…The potentialities of the pressure stimulated currents technique to be used as a continuous structural health monitoring tool in applications related to stone…”
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Non-destructive evaluation of cement-based materials from pressure-stimulated electrical emission – Preliminary results by Kyriazopoulos, A., Anastasiadis, C., Triantis, D., Brown, C.J.

“…► In situ assessment of remaining strength in concrete structures. ► Strength measured from discharge of electric current. ► Theoretical model for electrical…”
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Non-extensivity of the isothermal depolarization relaxation currents in uniaxial compressed rocks by Vallianatos, F, Triantis, D, Sammonds, P

“…The isothermal depolarization current relaxation in uniaxial compressed rocks follows a generalized exponential function which explicitly introduces…”
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Pressure stimulated electrical emissions from cement mortar used as failure predictors by Triantis, D., Stavrakas, I., Kyriazopoulos, A., Hloupis, G., Agioutantis, Z.

“…The electrical signals emitted during the application of uniaxial compressive mechanical stress upon cement mortar specimens are observed and discussed in this…”
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Marble epistyles under shear: An experimental study of the role of “Relieving Space” by Pasiou, E. D., Stavrakas, I., Triantis, D., Kourkoulis, S. K.

“…The mechanical response of mutually interconnected epistyles is studied experimentally. The specimens are made of two marble blocks connected to each other…”
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Acoustic Emission Analysis of Cement Mortar Specimens During Three Point Bending Tests by Stavrakas, I., Triantis, D., Kourkoulis, S.K., Pasiou, E.D., Dakanali, I.

“…Abstract This work discusses the experimental results of Acoustic Emission (AE) recordings during repetitive loading/unloading loops of cement mortar beams…”
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Dielectric properties of non-swelling bentonite: The effect of temperature and water saturation by Saltas, V., Vallianatos, F., Triantis, D.

“…In the present work, dielectric and conductivity measurements in the frequency range of 10 mHz–1 MHz were carried out by means of a high-resolution broadband…”
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The correlation of electrical charge with strain on stressed rock samples by Triantis, D., Anastasiadis, C., Stavrakas, I.

“…Laboratory experiments on rock samples have shown electric signal emissions when the samples are subjected to temporal stress increase especially when the…”
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Interface states and MWS polarization contributions to the dielectric response of low voltage ZnO varistor by Tsonos, C., Kanapitsas, A., Triantis, D., Anastasiadis, C., Stavrakas, I., Pissis, P., Neagu, E.

“…The main purpose of this work is to study the dielectric response of commercial low voltage ZnO varistors by means of dielectric relaxation spectroscopy (DRS)…”
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Pressure stimulated currents in rocks and their correlation with mechanical properties by Stavrakas, I., Triantis, D., Agioutantis, Z., Maurigiannakis, S., Saltas, V., Vallianatos, F., Clarke, M.

“…The spontaneous electrification of marble samples was studied while they were subjected to uniaxial stress. The Pressure Stimulated Current (PSC) technique was…”
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Temperature-dependent refractive index of potassium acid phthalate (KAP) in the visible and near-infrared by Moutzouris, K., Stavrakas, I., Triantis, D., Enculescu, M.

“…► KAP crystal refractive index measurements at temperatures up to 200 °C are reported. ► Temperature-dependent dispersion relations are proposed. ►…”
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An analysis of pressure stimulated currents (PSC), in marble samples under mechanical stress by Triantis, D., Stavrakas, I., Anastasiadis, C., Kyriazopoulos, A., Vallianatos, F.

“…The pressure stimulated current (PSC) technique was used in two variations, LSRT and SST for the investigation of the relations governing stress rate d S/d t,…”
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Comments on the phenomena underlying pressure stimulated currents in dielectric rock materials by Anastasiadis, C, Triantis, D, Hogarth, C. A

“…It has been observed that there is a systematic detection of weak pressure stimulated electric currents (PSC) in polycrystalline and amorphous solids during or…”
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Dielectric and conductivity measurements as proxy method to monitor contamination in sandstone by Saltas, V., Vallianatos, F., Soupios, P., Makris, J.P., Triantis, D.

“…The present work investigates whether dielectric spectroscopy can be used to detect contamination, which may leach in a natural porous material, due to the…”
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Piezo stimulated currents in marble samples: precursory and concurrent-with-failure signals by Stavrakas, I., Anastasiadis, C., Triantis, D., Vallianatos, F.

“…The Earth’s electric field transient variations are promising candidates of earthquake precursors. In order to study the physical mechanisms of such precursory…”
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Probing the microstructure of cement mortars through dielectric parameters’ variation by Tsonos, C., Stavrakas, I., Anastasiadis, C., Kyriazopoulos, A., Kanapitsas, A., Triantis, D.

“…The present work deals with the electrical properties of typical cement mortars during the hardening process, cured at low relative humidity. Measurements were…”
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