Acoustic emission to track the damage progress on thin-wall large-scale cement composites: damage mode and the effect of wave attenuation at intact and damage state

E. Tsangouri Eleni

doi:10.1117/12.2583408

22 March 2021 Acoustic emission to track the damage progress on thin-wall large-scale cement composites: damage mode and the effect of wave attenuation at intact and damage state

E. Tsangouri Eleni

Author Affiliations +

Proceedings Volume 11592, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XV; 115920F (2021) https://doi.org/10.1117/12.2583408
Event: SPIE Smart Structures + Nondestructive Evaluation, 2021, Online Only

Abstract

The damage evolution on thin-wall large-scale textile-reinforced cement composite structural elements loaded under bending is tracked in this study using acoustic emission. The monitoring technique has been extensively applied in recent decades for the structural health assessment of voluminous and bulk concrete structures, still its performance and efficacy on thin elements is not extensively investigated. In a well-established approach today, the AE waveform is analyzed based on a series of wave features. Indicatively, the damage progress is tracked based on AE energy and correlated to the mechanical properties (load, displacement). AE source localization detects and pinpoints the zones where cracks and internal debonding occur indicating the damage shift from the middle bending span to the edges of the beam. Based on this observation, the rise time and frequency analyses pinpoint the effect of source-sensor distance on the wave shape. This latter result is discussed considering a preliminary attenuation analysis at intact and damage state. The RA-value and frequency trends are also reported in an attempt to relate the research outcome to the Rilem TC 212-ACD protocol. It is shown that the AE inspection accuracy does not diminish due to thin-wall geometry, still taking into account of the attenuation effect at both intact and damage state is recommended.

Conference Presentation

Citation Download Citation

E. Tsangouri Eleni "Acoustic emission to track the damage progress on thin-wall large-scale cement composites: damage mode and the effect of wave attenuation at intact and damage state", Proc. SPIE 11592, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XV, 115920F (22 March 2021); https://doi.org/10.1117/12.2583408

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