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Title: Energy dissipation via acoustic emission in ductile crack initiation
Authors: Cuadra, J.
Baxevanakis, Konstantinos P.
Mazzotti, M.
Bartoli, I.
Kontsos, A.
Keywords: Acoustic emission energy
Cohesive zone modeling
Extended finite element method
Digital image correlation technique
Issue Date: 2016
Publisher: © Springer
Citation: CUADRA, J. ... et al, 2016. Energy dissipation via acoustic emission in ductile crack initiation. International Journal of Fracture, 199 (1), pp. 89-104.
Abstract: This article presents a modeling approach to estimate the energy release due to ductile crack initiation in conjunction to the energy dissipation associated with the formation and propagation of transient stress waves typically referred to as acoustic emission. To achieve this goal, a ductile fracture problem is investigated computationally using the finite element method based on a compact tension geometry under Mode I loading conditions. To quantify the energy dissipation associated with acoustic emission, a crack increment is produced given a pre-determined notch size in a 3D cohesive-based extended finite element model. The computational modeling methodology consists of defining a damage initiation state from static simulations and linking such state to a dynamic formulation used to evaluate wave propagation and related energy redistribution effects. The model relies on a custom traction separation law constructed using full field deformation measurements obtained experimentally using the digital image correlation method. The amount of energy release due to the investigated first crack increment is evaluated through three different approaches both for verification purposes and to produce an estimate of the portion of the energy that radiates away from the crack source in the form of transient waves. The results presented herein propose an upper bound for the energy dissipation associated to acoustic emission, which could assist the interpretation and implementation of relevant nondestructive evaluation methods and the further enrichment of the understanding of effects associated with fracture.
Description: The final publication is available at Springer via http://dx.doi.org/10.1007/s10704-016-0096-8.
Sponsor: This material is also based upon work supported by the National Science Foundation Graduate Research Fellowship under Grant No. 1002809. In addition, A. Kontsos and I. Bartoli acknowledge the financial support received by the Office of Naval Research, Award N00014-13-1-0143.
Version: Accepted for publication
DOI: 10.1007/s10704-016-0096-8
URI: https://dspace.lboro.ac.uk/2134/25785
Publisher Link: http://dx.doi.org/10.1007/s10704-016-0096-8
ISSN: 0376-9429
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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