Abstract
Combining with the effect of root deformations of the double cantilever beam (DCB) specimens, this paper presents two kinds of variational-analytical solutions of stress intensity factor (SIF)/energy release rate (ERR) for Mode II crack through force method and displacement method. The plane theory of elasticity is implemented for deformation and stress analysis of DCB in these two kinds of solutions. Comparison is made between the present solutions and finite element solutions which clearly substantiates the former accurate, applicable and effective in engineering designs.
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