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

Kourkoulis, S. K.; Pasiou, E. D.; Dakanali, I.; Stavrakas, I.; Triantis, D.

doi:10.15632/jtam-pl.56.2.523

Artykuł - szczegóły

Tytuł artykułu

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

Autorzy

Kourkoulis S. K. , Pasiou E. D. , Dakanali I. , Stavrakas I. , Triantis D.

Treść / Zawartość

Pełne teksty:

Kourkoulis_i in_Mechanical_Vol.56_nr 2-2018.pdf

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Identyfikatory

DOI

10.15632/jtam-pl.56.2.523

Warianty tytułu

Języki publikacji

Abstrakty

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.

Słowa kluczowe

marble monuments notch mouth opening displacement three-point bending pressure stimulated currents acoustic emissions 3D-digital image correlation

Wydawca

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Czasopismo

Journal of Theoretical and Applied Mechanics

Rocznik

2018

Tom

Vol. 56 nr 2

Strony

523--547

Opis fizyczny

Bibliogr. 53 poz., rys., tab.

Twórcy

autor

Kourkoulis S. K.

stakkour@central.ntua.gr

National Technical University of Athens, Department of Mechanics, Laboratory for Testing and Materials, Athens, Greece

autor

Pasiou E. D.

National Technical University of Athens, Department of Mechanics, Laboratory for Testing and Materials, Athens, Greece

autor

Dakanali I.

National Technical University of Athens, Department of Mechanics, Laboratory for Testing and Materials, Athens, Greece

autor

Stavrakas I.

Technological Educational Institute of Athens, Department of Electronics, Laboratory of Electrical Characterization of Materials and Electronic Devices, Athens, Greece

autor

Triantis D.

Technological Educational Institute of Athens, Department of Electronics, Laboratory of Electrical Characterization of Materials and Electronic Devices, Athens, Greece

Bibliografia

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).

Typ dokumentu

Bibliografia

Identyfikator YADDA

bwmeta1.element.baztech-ed9a359f-afdc-4a00-80f6-c1979b308c2f