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Simplification of CAD geometry using an hybrid method for efficient integration to FEM model

The simulation is at the heart of the product development cycle. To accelerate the design and simulation tasks, it is necessary to adapt the Computer Aided Design (CAD) model before the simulation process. This pre- processing task consists in adapting the CAD geometry, performing a mesh, specifying boundary conditions and loads, etc. This work presents a hybrid method based on an original algorithm in order to adapt and simplify the design geometric model to a simulation by the finite element method. It consists in the idealization of the CAD geometry by eliminating details (holes, chamfers, etc.) and fuses the faces using energetic method. These details increase the computing time due to a refined mesh in these details, which are considered as constraints hubs, without providing more precision in the simulation. An implementation of the proposed algorithm on the Open Cascade platform is also presented. The last part of this paper present example of mechanical part, which is simulated before and after simplification. The results of simulation illustrate the major contribution of the proposed method in terms of computing time without affect the quality of results.