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Dynamic interfacial fracture of a double cantilever beam

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journal contribution
posted on 19.11.2018, 10:15 authored by Tianyu Chen, Christopher HarveyChristopher Harvey, Simon WangSimon Wang, Vadim SilberschmidtVadim Silberschmidt
Assessment of the energy release rate (ERR) of layered material structures with account for dynamic and vibration effects is important for understanding and predicting fracture behavior in various engineering applications. In this work, the pure-mode-I interfacial fracture behavior of a symmetric double cantilever beam (DCB) under constant-rate opening displacement is studied using a dynamics and vibration analysis of Euler-Bernoulli beams, and the ERR is derived. Furthermore, a ‘dynamic factor’ that quantifies the dynamic effect in relation to the static component of ERR is defined. The resulting expressions are relatively short, mathematically elegant and convenient-to-use by engineers and researchers, which increases their usefulness. It is found that the dynamic factor is a function of the characteristic time only, and that this is an intrinsic property of DCB structures. An approximate method is also proposed to predict the crack extension. Predictions of ERR and crack extension are in good agreement with results from numerical results with finite-element method (FEM) simulations. Using only the first vibration mode is sufficient to capture the amplitude and frequency of ERR variation predicted by the FEM. Using higher-order vibration modes causes divergence in the amplitude of ERR oscillation; this is due to the limitation of Euler-Bernoulli beams in vibration analysis.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering
  • Mechanical, Electrical and Manufacturing Engineering

Department

  • Aeronautical and Automotive Engineering

Published in

Engineering Fracture Mechanics

Volume

225

Citation

CHEN, T. ... et al, 2018. Dynamic interfacial fracture of a double cantilever beam. Engineering Fracture Mechanics, 225, 106246.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publisher statement

This paper was accepted for publication in the journal Engineering Fracture Mechanics and the definitive published version is available at https://doi.org/10.1016/j.engfracmech.2018.11.033

Acceptance date

16/11/2018

Publication date

2018-12-06

ISSN

0013-7944

Language

en

Article number

106246