# Thin shells fabricated out of composite materials weakened by holes

## Conclusions

- 1)
effect of anisotropy on the stress state in the vicinity of holes has been investigated from the qualitative and quantitative sides in the classical formulation for shells made out of composite materials;

- 2)
exact and approximate analytic solutions are obtained for transversely isotropic single-layer and three-layer shells; and

- 3)
methods of solving problems for laminated shells have been developed with anisotropy and a reduced shear stiffness taken into account.

The following directions of investigations are being pursued for this problem at present: analysis of results and practical recommendations on taking account of the effect of interlayer shears in transversely isotropic shells; taking account of the combined mutual effect of anisotropy of the properties and low shear stiffness on the stress distribution near holes; analysis of computational schemes, development of practical recommendations, and the establishment of the limits of applicability of the applied theories in connection with calculations of laminated shells with holes.

## Keywords

Anisotropy Composite Material Stress Distribution Mutual Effect Classical Formulation## Preview

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