Probability density field of acoustic emission events
Damage identification in concrete structures
F. Zhang (TU Delft - Concrete Structures)
Y. Yang (TU Delft - Concrete Structures)
Marius Naaktgeboren (Ministry of Infrastructure and the Environment)
M. A.N. Hendriks (Norwegian University of Science and Technology (NTNU), TU Delft - Concrete Structures)
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Abstract
This paper proposes a new damage identification method, namely, the probability density field of acoustic emission (AE) events. This new method provides a different perspective to deal with the uncertainties in the source localization process. We treat the source location as a random variable, and estimate its probability density field based on a probability density function. The function was found from simulations where various uncertainties were included. The probability of AE events falling in a certain space range is the integral of the probability densities over that range. We apply the new method in a failure test of a full-scale reinforced concrete beam. The resultant probability density field clearly reflects the crack patterns of the specimen and a close relationship with the crack width.
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