Title: BUCKLING AND POST BUCKLING OF FILAMENT WOUNDED ISO-GRID SPACE STRUCTURE
Abstract: A finite element based Multi-Scale model of a lattice cylinder structure made of high modulus carbon fiber was used to perform buckling and post buckling analysis of filament wounded isogrid space structure. Material calibration was performed based on the test data then damage and fracture mechanism were evaluated in the same set of inputs for layups before simulations. The model was created based on the filament winding manufacturing process and manufacturing residual stresses were calculated. The buckling behavior of the structure then studied under the axial compressive loading condition. Damage and fracture mechanism evolution/tracking throughout the loading was achieved by an integrated Multi-Scale Progressive Failure Analysis Finite Element solution to demonstrate the damage and failure initiation and propagation. Linear eigenvalue buckling was performed to determine the critical buckling load. Post buckling analysis was also done to define the damage propagation after local buckling in the iso-grid structure using Riks algorithm. The critical buckling loads for linear and non-linear analysis were 909 klb and 393 klb, respectively. However, the structure collapsed before reaching to the critical buckling loads. The results showed that the damage initiated at intersections and they were mainly due to longitudinal compressive and fiber micro buckling damages.
Authors: Mehdi Salimi Jazi, Cody Godines, Dade Huang, Frank Abdi, Sang Woo Lee
Conference: CAMX 2017 –Orlando