Identification of the Destruction Process in Quasi Brittle Concrete with Dispersed Fibers Based on Acoustic Emission and Sound Spectrum.

Dominik Logoń

doi:10.3390/ma12142266

Abstract

The paper presents the identification of the destruction process in a quasi-brittle composite based on acoustic emission and the sound spectrum. The tests were conducted on a quasi-brittle composite. The sample was made from ordinary concrete with dispersed polypropylene fibers. The possibility of identifying the destruction process based on the acoustic emission and sound spectrum was confirmed and the ability to identify the destruction process was demonstrated. It was noted that in order to recognize the failure mechanisms accurately, it is necessary to first identify them separately. Three- and two-dimensional spectra were used to identify the destruction process. The three-dimensional spectrum provides additional information, enabling a better recognition of changes in the structure of the samples on the basis of the analysis of sound intensity, amplitudes, and frequencies. The paper shows the possibility of constructing quasi-brittle composites to limit the risk of catastrophic destruction processes and the possibility of identifying those processes with the use of acoustic emission at different stages of destruction.

Highlights

The application of acoustic emission (AE) measurements in determining the cracks, maximum load, and failure of reinforcement in cement composites has been widely presented in the literature
This paper focuses onisdetermining between and mechanical ability to carry stress higher than inthe therelation elastic range area. the Thisacoustic paper focuses on determining effects, in other words, reinforcement breaking, ESD
The 3D sound spectrum is a good tool for the observation and identification of failure processes in cement composites

Summary

Introduction

The application of acoustic emission (AE) measurements in determining the cracks, maximum load, and failure of reinforcement in cement composites has been widely presented in the literature. The continuous AE evaluation in composites was earlier reported [1,2,3] and this technique has been applied to determine crack propagation in the fracture process in cement composites with and without reinforcement [4,5]. Conducted tests have shown that AE is a good method for crack formation monitoring in mechanically loaded specimens [12,13,14,15,16,17,18] and has been successfully used to monitor structures [19,20]

Methods

Results

Discussion

Conclusion