Abstract The Schapery's nonlinear viscoelastic theory and nonlinear force-density method have been investigated to analyze the creep and recovery behaviors of space deployable mesh reflectors in this paper. Based on Schapery's nonlinear viscoelastic theory, we establish the creep and recovery constitutive model for cables whose pretensions were applied stepwise in time. This constitutive model has been further used for adjustment of cables’ elongation rigidity. In addition, the time-dependent tangent stiffness matrix is calculated by the partial differentiation of the corresponding load vector with respect to the nodal coordinate vector obtained by the nonlinear force-density method. An incremental-iterative solution based on the Newton-Raphson method is adopted for solving the time-dependent nonlinear statics equations. Finally, a hoop truss reflector antenna is presented as a numerical example to illustrate the efficiency of the proposed method for the creep and recovery behavior analysis of space deployable mesh structures.
Highlights Creep and recovery constitutive model for cables net structures is investigated. Cable's elongation rigidity is considered as a time-dependent parameter. Force density method is used to establish the time-dependent nonlinear static equilibrium equations. The proposed method enables us to re-optimize the initial pretensions conveniently. The proposed method enables us to predict the service life of cable net structures.
Creep and recovery behavior analysis of space mesh structures
Acta Astronautica ; 128 ; 455-463
2016-08-05
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Creep and recovery behavior analysis of space mesh structures
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