Yield condition for circular cylindrical shells made of a fiber-reinforced composite |
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Authors: | E A Movsumov F H Shamiev |
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Institution: | (1) Gyanjin State University, Azerbaijan;(2) Institute of Mathematics and Mechanics, National Academy of Sciences of Azerbaijan, Baku, Azerbaijan |
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Abstract: | A yield condition is obtained for circular cylindrical shells made of a definite class of fiber-reinforced composite material
whose components possess plastic properties. It is shown that, in the plane of generalized stresses — the axial bending moment
and the circumferential force (when the axial force is absent) — the yield curve consists of two linear and four curvilinear
sections. By approximating the curvilinear sections, we get a piecewise linear yield condition described by a hexagon in the
plane indicated. The nonlinear equations and the corresponding piecewise linear equations of the yield condition for particular
cases are given in the form of tables. In solving specific boundary-value problems, we consider a circular cylindrical shell
simply supported at its ends and loaded with a uniform internal pressure, for which the load-carrying capacity is determined
in relation to the mechanical properties of composite components and some characteristic geometrical parameters. The results
of numerical calculations are represented in the form of graphs.
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Translated from Mekhanika Kompozitnykh Materialov, Vol. 42, No. 5, pp. 655–666, September–October, 2006. |
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Keywords: | shell fiber-reinforced composite yield condition load-carrying capacity limit load flow rule bending |
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