This paper deals with the use of eXtended Finite Element Method (XFEM) to perform local effects inthree-dimensional reinforced composites. This method was first introduced to model cracks. It is basedon the partition of unity concept and the description of discontinuities like the location of holes andmaterial interfaces is often realized by the level-set method.The approach considered allows (i) to easily model the real geometry of reinforcing fibers (notidealized), (ii) to impose arbitrary Dirichlet and Neumann boundary conditions on the implicit definedboundaries and (iii) to introduce models of degradation. Numerical applications are presented onsome academic tests.
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