Multi-technique damage monitoring of concrete beams: Acoustic Emission, Digital Image Correlation, Dynamic Identification
| Autor: | Giuseppe Lacidogna, Gianfranco Piana, Alberto Carpinteri, Federico Accornero |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Digital image correlation
Materials science Pre-notched concrete beam Acoustics 0211 other engineering and technologies 020101 civil engineering Acoustic Emission Crack propagation Digital Image Correlation Dynamic Identification Fractal domain Fractal parameter Size-scale effect 02 engineering and technology Bending 0201 civil engineering Brittleness Flexural strength 021105 building & construction General Materials Science Civil and Structural Engineering Fracture mechanics Building and Construction Acoustic emission Bending stiffness Beam (structure) |
| Zdroj: | Construction and Building Materials. 242:118114 |
| ISSN: | 0950-0618 |
| Popis: | Acoustic Emission (AE), Digital Image Correlation (DIC) and Dynamic Identification (DI) techniques are used to analyse crack formation and propagation in plain concrete pre-notched beam specimens subject to three-point bending. Four dimensional scales are considered and scale effects on fracture energy, bending strength, and AE energy per unit area are investigated. The energy brittleness numbers are calculated for the different beam sizes to characterise the fragility of the specimens. For the larger sample, the principal strain directions obtained by DIC are put in relation with the crack path, while the analysis of resonant frequencies is used to correlate the bending stiffness reduction to the crack advancement. |
| Databáze: | OpenAIRE |
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