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SUMMARYThe method of dislocation layers is used to study the stress field of a loaded Griffith-type elastic strip crack in an orthotropic crystal. Three fundamental modes of tractions applied to the crack faces are discussed. Formal solutions are derived for the stress components and the distribution of stress near a crack tip is deduced, before representative numerical results are presented graphically. Finally, the method is applied to the BCS model of elastoplastic cracks. In particular, the results are convenient for studying certain orientations of elastic and elastoplastic cracks in hexagonal and cubic crystals.

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