Crack Paths 2012

Figure 2. Stitching in the CCT-Specimen.

This problem was solved by augmenting the triangulation given to N E T G E Nby

information on edges in the mesh which have to be kept in the new triangulation. At the

location of the edges the N E T G E Ntriangulation is finer and does not lead to

overlapping crack faces.

F O U R - P O I NBTE N D I NSGP E C I M E N

At M T Uand at the K T HStockholm about 15 Titanium-Alloy 4-point bending

specimens with initial slanted crack were tested under cyclic loading. The experimental

set-up is shown in Fig. 3. Due to the slant angle of 45° the bending momentleads to a

mixed-mode loading of the initial crack [2] (initial crack length is 5 mm). The original

mesh, the domain and a triangulation of the initial crack is illustrated in Fig. 4.

Figure 3. Experimental set-up of the 4PBtests.

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