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The lattice trapping effect of a crack in solids with layered structure has been studied with a double‐chain model. It is shown that the difference in physicomechanical properties between different atomic planes has significant influence upon this effect, and the stress range for stability of a crack can be enhanced by increasing the difference. This perhaps, provides a way for the lattice trapping effect to be made observable by appropriately synthesizing solids with superlattices of special design.