Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effects of Travel Distance to Acoustic Emission Parameters in Cement-Based Materials
By definition, Acoustic Emission (AE) signals are elastic waves emitted from any internal sources (micro-cracks, interfacial damage, phase transformation) and which propagate to the sensors. In most cases, the waveforms are attenuated and deformed on their travelling path. Thus, parameters characterizing the waveforms (such as Amplitude, Duration, Rise-time) are also strongly influenced. This effect is stronger when the propagation distance increases as indicated in some recent studies. This result is related to the different of velocities of the wave types (p-wave and s-wave) during the propagation of the wave, then the delay between the second and first wave increases. This creates a longer waveform, with higher Rise-time and Duration. The general result is that sensors which have longer distance from the AE source will produce lower Amplitude and higher RA (Rise-time per Amplitude) value signals. This means that the propagation distance should be incorporated in any damage classification. This study concluded that the RA values increase when the signals propagate through heterogeneous material may lead to a wrong conclusion when using damage classification namely RA method which has been indicated in RILEM TC 212-ACD.
Effects of Travel Distance to Acoustic Emission Parameters in Cement-Based Materials
By definition, Acoustic Emission (AE) signals are elastic waves emitted from any internal sources (micro-cracks, interfacial damage, phase transformation) and which propagate to the sensors. In most cases, the waveforms are attenuated and deformed on their travelling path. Thus, parameters characterizing the waveforms (such as Amplitude, Duration, Rise-time) are also strongly influenced. This effect is stronger when the propagation distance increases as indicated in some recent studies. This result is related to the different of velocities of the wave types (p-wave and s-wave) during the propagation of the wave, then the delay between the second and first wave increases. This creates a longer waveform, with higher Rise-time and Duration. The general result is that sensors which have longer distance from the AE source will produce lower Amplitude and higher RA (Rise-time per Amplitude) value signals. This means that the propagation distance should be incorporated in any damage classification. This study concluded that the RA values increase when the signals propagate through heterogeneous material may lead to a wrong conclusion when using damage classification namely RA method which has been indicated in RILEM TC 212-ACD.
Effects of Travel Distance to Acoustic Emission Parameters in Cement-Based Materials
Lecture Notes in Civil Engineering
Ha-Minh, Cuong (Herausgeber:in) / Tang, Anh Minh (Herausgeber:in) / Bui, Tinh Quoc (Herausgeber:in) / Vu, Xuan Hong (Herausgeber:in) / Huynh, Dat Vu Khoa (Herausgeber:in) / Nguyen-Tat, Tam (Autor:in)
CIGOS 2021, Emerging Technologies and Applications for Green Infrastructure ; Kapitel: 18 ; 187-196
28.10.2021
10 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Acoustic emission , Concrete , Mortar , Damage classification , Mode I , Mode II , Distance , Propagation , RA value Engineering , Geoengineering, Foundations, Hydraulics , Sustainable Architecture/Green Buildings , Sustainable Development , Structural Materials , Cyber-physical systems, IoT , Professional Computing
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