Open AccessDamage Propagation at the Interface of a Sandwich Beam
Author(s) -
Imane Hammoudi,
Mokhtar Touati,
Mohamed Chabaat
Publication year - 2022
Publication title -
periodica polytechnica. civil engineering/periodica polytechnica. civil engineering (online)
Language(s) - English
Resource type - Journals
eISSN - 1587-3773
pISSN - 0553-6626
DOI - 10.3311/ppci.19642
Subject(s) - adhesive , materials science , strain energy release rate , composite material , fracture mechanics , shear (geology) , timoshenko beam theory , beam (structure) , shear modulus , work (physics) , shear stress , adhesive bonding , structural engineering , transverse plane , stress (linguistics) , nonlinear system , stress intensity factor , layer (electronics) , physics , engineering , thermodynamics , linguistics , philosophy , quantum mechanics
In this research work, damage propagation at the interface of a cracked sandwich beam is considered. The behavior of Sandwich Beams (SB) depends upon a law based on relationship between tangential or normal efforts with inelastic propagation. As the crack propagates; fracture parameters such as stress intensity factors and energy release rates corresponding to the applied shear stress in mode I and II are determined. Linear and nonlinear models are presented. It is shown that the Timoshenko beam’s theory is employed in the formulation of transverse shear and peel stresses at the overlap ends. These parameters are used to derive energy release rates. Besides, effects of the adhesive thickness and shear modulus on the shear and peel stresses in the adhesive are studied. Obtained results from the analytical solution for the case of a sandwich beam at the interface (adhesive part) agree well with numerical investigations available in the literature. It is also proven that the contribution of the adhesive bond to the energy release rate increases for softer adhesives, shorter cracks and thicker bonds.