Issue 29

R. Dimitri et alii, Frattura ed Integrità Strutturale, 29 (2014) 266-283; DOI: 10.3221/IGF-ESIS.29.23 277 Example 3 (  N >  T ) Also in this example a path dependency of the energy dissipation is always observed for each CZM. Fig. 13 and 14, illustrate W N , W T and W as computed by means of each model under the two loading paths. The same observations made earlier about the non-monotonic evolution of W are still applicable in this case for CZM2 (Fig. 13b) and CZM4-PL criterion (Fig. 13d and 14d). Unlike in the first two examples, in this case CZM3 is always consistent (Fig. 13c, 14c), while CZM4 does not consistently dissipate all the fracture energy when a BK criterion is applied for debonding propagation (Fig. 14e). All the other cases are correctly captured, as shown in Fig. 13a, and 14a,b. This emphasizes as CZMs may or may not present physical inconsistencies depending on the selected input fracture parameters. (a) (b) (c) (d) (e) Figure 13 : Work of separation under non proportional Path 1 (  N >  T ): (a) CZM1; (b) CZM2; (c) CZM3; (d) CZM4-PL criterion; (e) CZM4-BK criterion. (a) (b) (c) (d) (e) Figure 14 : Work of separation under non proportional Path 2 (  N >  T ): (a) CZM1; (b) CZM2; (c) CZM3; (d) CZM4-PL criterion; (e) CZM4-BK criterion.