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Delamination propagation under high loading rate

journal contribution
posted on 14.08.2020 by Tianyu Chen, Christopher Harvey, Simon Wang, Vadim Silberschmidt
Analytical theory for the dynamic delamination behavior of a double cantilever beam (DCB) under high loading rate is developed. Structural vibration and wave dispersion are considered in the context of Euler-Bernoulli beam theory. The theory is developed for both initiation and propagation of delamination in mode I. Two solutions for the energy release rate (ERR) are given for a stationary delamination: an accurate one and a simplified one. The former is based on global energy balance, structural vibration and wave dispersion; the latter is ‘local’ since it is based on the crack-tip bending moment. For the simplified solution to be accurate, sufficient time is needed to allow the establishment of all the standing waves. For a propagating delamination, a solution for the ERR is derived using the same simplification with the cracktip bending moment. The obtained ERR solutions are verified against experimental data and results from finite-element simulations, showing excellent agreement. One valuable application of the developed theory is to determine a material’s dynamic loading-ratedependent delamination toughness by providing the analytical theory to post-process test results of dynamic DCB delamination.

History

School

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

Department

  • Aeronautical and Automotive Engineering

Published in

Composite Structures

Pages

112734

Publisher

Elsevier BV

Version

AM (Accepted Manuscript)

Publisher statement

This paper was accepted for publication in the journal Composite Structures and the definitive published version is available at https://doi.org/10.1016/j.compstruct.2020.112734

Acceptance date

24/07/2020

Publication date

2020-07-29

ISSN

0263-8223

eISSN

1879-1085

Language

en

Depositor

Dr Christopher Harvey. Deposit date: 11 August 2020

Article number

112734

Exports