Modelling of crack nucleation in the fibre of composite reinforced with unidirectional fibres under shear
Keywords:
nucleation of shear crack, composite, unidirectional fibres, traction in bonds, transverse shearAbstract
The model of shear crack nucleation in composite fibre with the periodic structure, based on consideration of fracturing zone is offered. It is assumed, that the fracturing zone represents as finite length layer that containing the material with partially broken bonds between separate structural elements. The analysis of prefracture zone limiting equilibrium under transverse shear is carried out on the basis of criterion of material bonds limiting shear and includes: 1) an establishment of cohesive forces dependence from prefracture zone faces shear; 2) an estimation of the stress state near to prefracture zone in view of external loadings and cohesive forces; 3) definition of critical external loadings dependence from geometrical parameters of the composite environment at which appears the crack.
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