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The extraordinary combination of strength and toughness attained by nature's highly sophisticated structural design in nacre has inspired the synthesis of novel layered nanomaterials. The object of the present paper is a nanostructured layered TiO2/PE-composite, mimicking the nacre's structure. In the present work, the influence of the thickness ratio between organic and inorganic phases and the influence of mineral bridges on the Young's modulus of the composites is analyzed analytically and numerically. By application of these findings in a modeling approach, the mechanical properties of artificially produced materials can be predicted.