International Journal of Fracture

, Volume 199, Issue 1, pp 89–104

Energy dissipation via acoustic emission in ductile crack initiation

  • J. A. Cuadra
  • K. P. Baxevanakis
  • M. Mazzotti
  • I. Bartoli
  • A. Kontsos
Original Paper

DOI: 10.1007/s10704-016-0096-8

Cite this article as:
Cuadra, J.A., Baxevanakis, K.P., Mazzotti, M. et al. Int J Fract (2016) 199: 89. doi:10.1007/s10704-016-0096-8

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.

Keywords

Acoustic emission energy Cohesive zone modeling Extended finite element method Digital image correlation technique 

Funding information

Funder NameGrant NumberFunding Note
Office of Naval Research
  • N00014-13-1-0143

Copyright information

© Springer Science+Business Media Dordrecht 2016

Authors and Affiliations

  • J. A. Cuadra
    • 1
    • 3
  • K. P. Baxevanakis
    • 1
  • M. Mazzotti
    • 2
  • I. Bartoli
    • 2
  • A. Kontsos
    • 1
  1. 1.Theoretical and Applied Mechanics Group, Mechanical Engineering and Mechanics DepartmentDrexel UniversityPhiladelphiaUSA
  2. 2.Civil, Architectural and Environmental Engineering DepartmentDrexel UniversityPhiladelphiaUSA
  3. 3.Lawrence Livermore National LaboratoryNondestructive Characterization InstituteLivermoreUSA

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