With the aim of reducing time and cost of material characterization, the development of testing procedure has been done internally to determine tensile and flexural properties of composite material. This work is done in parallel of a US-based team that will use the data for material modelling. The materials studied are knitted composites made of polycarbonate and various reinforcement (carbon and glass fiber). A study on the impact of fiber sizing on mechanical properties has also been conducted. It appears that mechanical results were close to the reference data. Simple knitted structure shows isotropic behavior compared to unidirectional knitted structure. Sizing does not seem to have an impact on mechanical properties, but it seems to decrease the risk of having cracks at fiber/matrix interface after manufacturing. Effectively, microscopic observations were performed to understand the structure of the composite after manufacturing which can explain the behavior at failure. The most relevant point is that a lack of impregnation is visible for each material, which suggests that an improvement of material consolidation is possible. To conclude, the main objectives of the study were reached but the development of shear test and the variation of material fabrication parameter must still be done.