We present some numerical simulations of AE due to damage propagation in disordered materials under compression and bending. To this purpose, the AE cumulative number, the time frequency analysis and the statistical properties of AE time series will be numerically simulated adopting the so-called "particle method strategy" [1]. The method provides the velocity of particles in a set simulating the behavior of a granular system and, therefore, is suitable to model the compressive wave propagation and acoustic emission (corresponding to cracking) in a solid body. The numerical simulations [2] correctly describe the compression test in terms of mean stress-strain response and crack pattern [3]. The size effects on the peak compressive strength and on the AE count are correctly reproduced. In addition, the amplitude distribution (b-value) and temporal evolution of AE events due to cracking, crucial for the evaluation of damage and remaining lifetime, were simulated and result in agreement with the experimental evidences.
Particle-based numerical modeling of AE statistics in disordered materials / Invernizzi, Stefano; Lacidogna, Giuseppe; Carpinteri, Alberto. - In: MECCANICA. - ISSN 0025-6455. - STAMPA. - 48:1(2013), pp. 211-220. [10.1007/s11012-012-9595-5]
Particle-based numerical modeling of AE statistics in disordered materials
INVERNIZZI, Stefano;LACIDOGNA, GIUSEPPE;CARPINTERI, Alberto
2013
Abstract
We present some numerical simulations of AE due to damage propagation in disordered materials under compression and bending. To this purpose, the AE cumulative number, the time frequency analysis and the statistical properties of AE time series will be numerically simulated adopting the so-called "particle method strategy" [1]. The method provides the velocity of particles in a set simulating the behavior of a granular system and, therefore, is suitable to model the compressive wave propagation and acoustic emission (corresponding to cracking) in a solid body. The numerical simulations [2] correctly describe the compression test in terms of mean stress-strain response and crack pattern [3]. The size effects on the peak compressive strength and on the AE count are correctly reproduced. In addition, the amplitude distribution (b-value) and temporal evolution of AE events due to cracking, crucial for the evaluation of damage and remaining lifetime, were simulated and result in agreement with the experimental evidences.Pubblicazioni consigliate
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https://hdl.handle.net/11583/2498432
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