13th International Conference on Fracture June 16–21, 2013, Beijing, China The computation has been performed in 1h26mn on a dual core laptop with 110 remeshing steps. The mesh is built of linear tetrahedron, producing about 20 000 to 35 000 degrees of freedom, depending of the crack geometry complexity during the growth. Material integration, linear solver and stress intensity factors processes are multi-threaded. Some pictures of the cracked mesh are shown on figure 7, an animation can be watched on the web2 as others example on plates, or 3D structures with coalescing cracks. 4. Conclusion A robust meshing technique for 3D crack growth simulations has been presented. This method, based on a simplification of the usual boolean operation between meshes, has been implemented in the finite element software Z-set and allows to perform complex crack propagation computations for academic problems (adaptive cohesive zone modeling [7], for instance) as well as for industrial components. References [1] N. Moes, J. Dolbow, and T. Belytschko. A finite element method method for crack growth without remeshing. Int. Journal for Num. Meth. In Engrg, 46:131–150, 1999. [2] B.J. Carter, P.A. Wawrzynek, and A.R. Ingraffea. Automated 3-d crack growth simulation. Int. J. Numer. Methods Engrg., 47:229–253, 2000. [3] Robert W. Zimmerman Adriana Paluszny. Numerical simulation of multiple 3d fracture propagation using arbitrary meshes. Comput. Methods Appl. Mech. Engrg., 200:953–966, 2011. [4] J. Besson and R. Foerch. Large scale object-oriented finite element code design. Comp. Meth. in Appl. Mech. and Eng., 42:165–187, 1997. [5] M. Gosz, J. Dolbow, and B. Moran. Domain integral formulation for stress intensity factor computation along curved three-dimensional interface cracks. International Journal of Solids and Structures, 35(15):1763 – 1783, 1998. [6] V. Chiaruttini, J. Guilie, V. Riolo, and M. Bonnet. Fast and efficient stress intensity factors computations for 3D cracked structures application to unstructured conform meshes or X-FEM discretization. in preparation. [7] V. Chiaruttini, D. Geoffroy, V. Riolo, and M. Bonnet. An adaptive algorithm for cohesive zone model and arbitrary crack propagation, European Journal of Computational Mechanics, 21:208-218, 2012. 2 http://www.youtube.com/user/OneraMNU/videos -9-
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