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Components manifacturing process by resin injection in a reinforcement is characterized by many variables, which interact with each other and can have a strong influence on the result (component geometry, thickness, tissue geometry, rheological and chemical properties of resin, mold material, inlet and outlet points, etc). Most companies operate with a type of "trial and error" approach, results of which are not always those of an optimized process and that in any case involves high costs and development time. In fact, to obtain a good component quality, it is important to avoid that impregnating liquid accumulates in specific areas of the component, causing formation of weakness and fragility points. In addition, it should be prevented the creation of preferential routes through which it can reach the output channels before completing the filling of mold or the impregnation of reinforcing. This can cause defects in the final component that will compromise functionality.
Using numerical modeling is possible to effectively design the component, considering all the parameters that most affect production process, such as permeability, porosity and formability of reinforcement and their mutual interactions, with a substantial reduction of time and costs of development and industrialization. However, to secure benefits of numerical simulation, an iterative comparison with experimental data is always necessary.
CETMA has accumulated a deep specialist knowledge on viscous liquid infusion processes (resins, adhesives, biological fluids, etc.) within a porous media (fiber reinforcement, stone agglomerate, sponges) and has collected a wide range of experimental data, which allow to calibrate numerical models used in simulations obtaining more reliable results.
The solution can be applied to all sectors that need design and production of components by viscous liquid injection processes in a preform. The main application field is transportation industry: aerospace, aviation, automotive, marine and rail.