OS0307 Effect of adhesion layer thickness on the stress intensity factor for small edge interface crack under uniaxial tension
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This paper deals with the effect of adhesion layer on the stress intensity factor for small edge interface crack in bonded plates under uniaxial tension. In this study, the stress intensity factors of the small edge interface crack are analyzed by the crack tip stress method with varying the crack length, adhesive thickness and material combination. This method is based on the fact that the singular stress field near the interface crack tip is controlled by the stress values at the crack-tip-node calculated by FEM. The calculation shows that the normalized stress intensity factors of the small edge interface crack under uniaxial tension are related to the ratio between the crack length and the adhesive thickness (a/h) and the singularity at the interface edge without the crack λ. Then, it is found that the normalized stress intensity factors can be expressed as F_<1,2>=C_<1,2>(h/a)^<1-λ> and the parameters C_1 and C_2 are constant values when a/h<10^<-3>.
