Statistical analysis of acoustic emission avalanches generated during the compressive fracture process, and Mode I fracture process in cementitious composites

Saha, I and Vidya Sagar, R (2022) Statistical analysis of acoustic emission avalanches generated during the compressive fracture process, and Mode I fracture process in cementitious composites. In: International Journal of Fracture .

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Abstract

This article reports a statistical analysis of acoustic emission (AE) avalanches in cementitious composites generated during unconfined uniaxial compression and flexural loading. The analysis emphasises on the probability distribution of absolute AE energies of the individual AE events and on the time correlations (aftershock rate for Omori�s law and waiting time between successive AE events for Universal Scaling Law). Under compression, the G-R exponent (ϵ) remained constant at 1.15, 1.21, 1.21 and 1.32 for specimens having steel volume fraction (Vf) 0, 0.8, 1.6 and 2 respectively, for at least three decades (represents the powers of ten, i.e., 10 1 is one decade, 10 2 is two decades and so on) under uniaxial compression. A decrease in ϵ was observed as the damage in the material progressed for compressive fracture and Mode I fracture process. Distribution of other AE avalanche characteristics like inter-event time and waiting time (δ) distribution show almost similar characteristics for varying Vf. © 2022, The Author(s), under exclusive licence to Springer Nature B.V.

Item Type:	Journal Article
Publication:	International Journal of Fracture
Publisher:	Springer Science and Business Media B.V.
Additional Information:	The copyright for this article belongs to Springer Science and Business Media B.V.
Keywords:	Acoustic emission testing; Acoustic emissions; Fracture; Statistical methods, Acoustic-emissions; Cementitious composites; Compressive fracture; Fracture mode; Fracture process; Integrity of material; Mode I fracture; Power-law; Probabilistics approach; Waiting time, Probability distributions
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	16 Mar 2022 06:12
Last Modified:	16 Mar 2022 06:12
URI:	http://eprints.iisc.ac.in/id/eprint/71508

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