Nonintrusive coupling of 3D and 2D laminated composite models based on finite element 3D recovery

摘要

In order to simulate the mechanical behavior of large structures assembledfrom thin composite panels, we propose a coupling technique which substituteslocal 3D models for the global plate model in the critical zones where platemodeling is inadequate. The transition from 3D to 2D is based on stress anddisplacement distributions associated with Saint-Venant problems which areprecalculated automatically for a simple 3D cell. The hybrid plate/3D model isobtained after convergence of a series of iterations between a global platemodel of the structure and localized 3D models of the critical zones. Thistechnique is nonintrusive because the global calculations can be carried outusing commercial software. Evaluation tests show that convergence is fast andthat the resulting hybrid model is very close to a full 3D model.