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Elastoplastic state of flexible spherical shells with a reinforced elliptic hole
Authors:I. S. Chernyshenko  E. A. Storozhuk  I. B. Rudenko
Affiliation:(1) S. P. Timoshenko Institute of Mechanics, National Academy of Sciences of Ukraine, 3 Nesterov St., Kyiv, Ukraine, 03057;(2) National State University of Taxation Service of Ukraine, 31 K. Marks St., Irpen, Ukraine, 08200
Abstract:
The elastoplastic state of a thin spherical shell weakened by an elliptic hole is analyzed. Finite deflections are considered. The hole is reinforced with a thin ring. The shell is made of an isotropic homogeneous material. The load is internal pressure. A relevant problem is formulated and solved numerically with allowance for physical and geometrical nonlinearities. The distribution of stresses, strains, and displacements along the elliptic boundary and in the zone of their concentration is studied. The stress–strain state of the shell near the hole is analyzed Translated from Prikladnaya Mekhanika, Vol. 44, No. 12, pp. 93–101, December 2008.
Keywords:nonlinear problem  stress concentration  spherical shell  elliptical hole  stiffening ring  plastic strains  finite deflections
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