Stability behavior of scissor-type deployable structures

This paper examines the stability of deployable structures through global and local analysis. It uses geometric nonlinear analysis (GNA) and Euler buckling analysis to investigate scissor-type structures. GNA identifies global instability modes, while Euler buckling simulates member behavior. A numerical design example is given where the initial member sections were selected for satisfying stiffness requirements and with low self-weight. Results highlight the considerable influence of scissor-type connections on global stability. While fully deployed states meet requirements, intermediate states may not satisfy stability criteria. These findings improve understanding for optimizing deployable structures, especially in selecting intermediate functional states. • A NLFEM model was developed for stability analysis for scissor-type deployable structures. • Formulas developed for member deflection and buckling for 2D analysis. • The uniqueness of scissor connections considerably influence stability behavior. • Global and local critical stability conditions were calculated for both final and intermediate states. • Stability at intermediate functional states is shown using a numerical design example.