Abstract
Abstract The purpose of this work is to propose an innovative global/local approach for the failure onset analysis of deployable composite thin and ultra-thin structures in the nonlinear field. The adoption of this technique allows for the overcoming of the weaknesses related to the commercial calculation codes, which make use of three-dimensional finite elements to capture the local stress field arising within the booms. In this framework, the proposed approach leads to a reduction of computational cost, while keeping a high level of accuracy. This is possible thanks to the Carrera Unified Formulation, which allows for the modeling of higher-order plate elements for the analysis of local critical regions of complex composite assemblies. In order to show the potentialities of the global/local approach, particular attention is given to the problems that mostly characterize composites, among which those related to free-edge, failure concept and interlaminar continuity of the displacements and shear stresses. The triangular rollable and collapsible boom is considered in this study. The results show a perfect accuracy of the in-plane stress components between the global stress values, evaluated with commercial software, and local distribution evaluated with a refined layerwise model. The description of the out-of-plane components is shown too, along with the failure indeces.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call