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Article dans une revue

Passive monitoring of nonlinear relaxation of cracked polymer concrete samples using Acoustic Emission

Abstract : This work presents an acoustic emission (AE) monitoring of slow dynamics in micro-cracked polymer concrete (PC) samples. In order to obtain calibrated damage states, AE was first used to characterize the micro-damage mechanisms in real time when PC samples are submitted to three-point bending tests. Then, an unsupervised classification of AE data based on the Principle Component Analysis and the k-means clustering was applied to classify AE data. The AE monitoring of the nonlinear relaxation of PC samples revealed the existence of a silence period followed by AE hits belonging to two different damage classes. A similarity appeared between the properties of the detected AE hits obtained during the nonlinear relaxation and the quasi-static tests. Finally, this work shows that the dynamics of both mechanisms during the nonlinear relaxation are clearly different.
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https://hal-univ-lemans.archives-ouvertes.fr/hal-02462731
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Dernière modification le : vendredi 8 janvier 2021 - 03:15:37
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Xiaoyang Yu, Mourad Bentahar, Charfeddine Mechri, Silvio Montrésor. Passive monitoring of nonlinear relaxation of cracked polymer concrete samples using Acoustic Emission. Journal of the Acoustical Society of America, Acoustical Society of America, 2019, ⟨10.1121/1.5127519⟩. ⟨hal-02462731⟩

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