Dimitrios G. Aggelis

TL;DR: In this paper, a number of acoustic emission indices are proposed to classify the cracks according to their mode, which can provide a warning against the final failure of a concrete structure during bending.

TL;DR: In this paper, the authors describe the acoustic emission behavior of concrete under four-point bending and show that the total acoustic emission (AE) activity is directly proportional to the fiber content.

TL;DR: Results from an experimental study concerning wave propagation in cementitious materials show that aggregate content play an important role in wave propagation increasing considerably the wave velocity, while the aggregate size seems to control the attenuation observed.

TL;DR: In this article, different acoustic emission indices are correlated with the accumulation of damage and the type of source, and the amplitude distribution of acquired signals is very sensitive to micro-cracking, while individual mechanisms like matrix cracking and fibre pull-out can be distinguished by the average frequency of the corresponding signals which exhibits a severe decrease at the moment of main.

TL;DR: The capability of the AE technique to detect corrosion occurring in real-time makes it a strong candidate for serving as an efficient NDT method, giving it an advantage over other NDT methods.