Fracture Mechanics Analysis of Reinforced DCB Sandwich Debond Specimen Loaded by Moments

Vishnu Saseendran, Christian Berggreen, Leif A. Carlsson

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Abstract

Analytical expressions for the energy release rate and mode-mixity phase angle are derived for a sandwich composite double-cantilever beam fracture specimen with the face sheets reinforced by stiff plates. The sandwich beam is considered symmetric, with identical top and bottom facesheets. Only a pure moment loading is considered. The J-integral coupled with laminate beam theory is employed to derive closed-form expression for the energy releaserate in terms of the applied moments, geometry, and material properties .A scalar quantityωis obtained to express the mode-mixity phase angle. It is shown that ω is independent of the applied loading conditions. The value of ω is found to be moderately influenced by reinforcement thicknesses.
Original languageEnglish
JournalA I A A Journal
Volume56
Issue number1
Pages (from-to)413-422
ISSN0001-1452
DOIs
Publication statusPublished - 2018

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