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991.
The paper presents a technique for numerical analysis of the elastoplastic stress-strain state of flexible laminated shells
of revolution made of isotropic and transversely isotropic materials and subjected to axisymmetric loading and heating. The
technique is based on the Kirchhoff-Love hypotheses for the whole laminate. The deformation of the isotropic materials is
described using the theory of deformation along paths of small curvature. The deformation of the transversely isotropic material
is described using the flow theory with isotropic hardening. The process of loading is divided into steps at each of which
the stress-strain state is determined by the method of successive approximations. A numerical example is given
__________
Translated from Prikladnaya Mekhanika, Vol. 42, No. 12, pp. 76–86, December, 2006. 相似文献
992.
A method is proposed for the numerical analysis of the thermoelastoplastic stress-strain state of laminated shells of revolution, made of isotropic and orthotropic materials, under axisymmetric loading. The method is based on the Kirchhoff-Love hypotheses for a layer stack, the theory of deformation along paths of small curvature for isotropic materials, and Hills theory of flow with isotropic hardening for orthotropic materials. The problem is solved by the method of successive approximations. A numerical example is given.__________Translated from Prikladnaya Mekhanika, Vol. 40, No. 12, pp. 84–91, December 2004. 相似文献
993.
Optimal Control of Deployment of a Tethered Subsatellite 总被引:6,自引:0,他引:6
One of the most important operations during a tethered satellite system mission is the deployment of a subsatellite from a space ship. We restrict tothe simple but practically important case that the system ismoving on a circular orbit around the Earth. The main problem duringdeployment due to gravity gradient is that the two satellites do not move along the straight radial relative equilibrium position which is stable for a tether of constant length. Instead, deploymentleads to an unstable motion with respect to the radial relativeequilibrium configuration. Therefore we introduce an optimal control strategy using theMaximum Principle to achieve a force controlled deployment of the tethered subsatellite from the radial relative equilibrium position close to the space ship to the radial relative equilibrium position far away from the space ship. 相似文献
994.
A method is developed for analysis of the elastoplastic stress-strain state of laminated shells of revolution under axisymmetric
loading. The shells are made of isotropic and transversally isotropic materials with different moduli. The method is based
on the Kirchhoff-Love hypotheses for the whole laminate, the theory of deformation along paths of small curvature (for isotropic
materials), and the theory of elasticity with different tensile and compressive moduli (transversely isotropic materials).
The problem is solved by the method of successive approximations. Numerical examples are given
__________
Translated from Prikladnaya Mekhanika, Vol. 41, No. 8, pp. 88–96, August 2005. 相似文献
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1000.
Tavorite‐structured oxyphosphates, fluorophosphates, oxysulfates, and fluorosulfates are evaluated for use as cathode materials in lithium ion batteries and activation energies for lithium diffusion through LiVO(PO4), LiV(PO4)F, and LiFe(SO4)F are calculated. 相似文献