WrapToR composite truss structures: Measurement and modelling of mechanical response

Wrapped Tow Reinforced (WrapToR) trusses are ultra-efficient structures that are produced from composite materials using a novel winding process. In this study, a structural model based on the stiffness method is developed for the novel truss configuration to predict the pre-failure mechanical response. To validate the model, the mechanical response of the structures is experimentally investigated to a high level of detail using a series of three-point bend tests. Results of the tests highlight the importance of modelling behaviour of the truss joints due to both internal joint deformations and their effect on load transfer between members. The results also show that the developed model can predict deflections and strains to a reasonable accuracy across a range of truss configurations.