Issue 19

M. Paggi, Frattura ed Integrità Strutturale, 19 (2012) 29-36; DOI: 10.3221/IGF-ESIS.19.03 34 Figure 7 : 2D model of a hierarchical polycrystal (CZM interface elements are shown in yellow and red, at the different scales). Figure 8 : Shapes of the CZMs of the interfaces between the rods (level 2 or mesostructure). Figure 9 : dimensionless tensile strength vs. CZM peak stress ratio between levels 2 and 1.