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Mechanics of Composite Structures by George S. Springer, László P. Kollár

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CHAPTER EIGHT

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Shells

In this chapter we consider thin composite shells, which we analyze on the basis of the main assumptions employed in the theory of thin plates. However, there is a major difference in the behavior of plates and shells subjected to external loads. Plates resist transverse loads by bending and by transverse shear forces. On the other hand, thin shells resist the transverse loads mostly by membrane forces, which, at any given point, are in the plane tangential to the reference surface (Fig. 8.1). These membrane forces are determined by the “membrane theory of shells,” which neglects bending moments. The resulting stresses, strains, ...

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