Issue 45

G. Gomes et alii, Frattura ed Integrità Strutturale, 45 (2018) 67-85; DOI: 10.3221/IGF-ESIS.45.06 81 Results for modified CTS Fig. 16 shows the initial mesh for the CTS01 test generated by the BC2D program, with an enlarged detail of the initial crack. The other CTS models have the same mesh size and will not be shown here for simplification. This mesh has 168 nodes and 84 quadratic elements, 16 continuous in the main hole and 4 discontinuous on each surface crack. Figure 16: Initial mesh for modified CTS (CTS01) by Bemcracker2D program. Fig. 17 shows the crack path mesh obtained by the BC2D and Quebra2D programs, comparing the BEM and FEM results for the four modified CTS. The initial FEM mesh consists of about 1300 elements and 2300 nodes and, in the final crack propagation step, it has increased to about 2200 elements and 5500 nodes, while the BEM mesh increased from 84 to 142 elements and 168 to 284 nodes. Figure 17: Crack growth: BemCracker2D (BEM) and Quebra2D (FEM).