Issue 37

J. Kramberger et alii, Frattura ed Integrità Strutturale, 37 (2016) 153-159; DOI: 10.3221/IGF-ESIS.37.21 157 Model 1 Model 2 Model 3 Model 4 Model 5 Number of cycles 1 20 40 60 80 100 150 200 Figure 3 : Crack propagation in models with the same porosity and different topology. After 60 cycles, cracks between the pores and pores themselves form a larger coalesced crack, which is almost completely formed at 100 cycles. Some miniscule crack growth occurs between 100 and 200 cycles, but due to drop of macro-rigidity, the crack growth rate stops near 200 cycles and although the calculation runs until 500 cycles, no further crack growth is detected.