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 -integral coupled with laminate beam theory is employed to derive closed-form expression for the energy release rate in terms of the applied moments, geometry, and material properties. A scalar quantity is obtained to express the mode-mixity phase angle. It is shown that is independent of the applied loading conditions. The value of is found to be moderately influenced by reinforcement thicknesses.
Fracture Mechanics Analysis of Reinforced DCB Sandwich Debond Specimen Loaded by Moments
AIAA Journal ; 56 , 1 ; 413-422
2018-01-01
Article (Journal)
Electronic Resource
English
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