Issue 57

R. Andreotti et alii, Frattura ed Integrità Strutturale, 57 (2021) 223-245; DOI: 10.3221/IGF-ESIS.57.17

Figure 18: Micro-hardness profile for 60° impacts. No significant peaks are measured. The maximum value is 275HV, located at the epicentre of the impact.

Figure 19: Micro-hardness profile for 45° impacts. No significant peaks are observed. The maximum value is 224HV, located at the epicentre of the impact.

D EVELOPMENT OF THE NUMERICAL MODEL he numerical models were developed according to the experimental evidence, characterized by high fragmentation of the bullet and a reasonably continuous field of plastic strain of the target as demonstrated by the micro-hardness measures. The simulations were conducted by means of the well-established explicit solver LS-DYNA. A simplified finite element model for the splashing impactor The bullet is defined as a volume fraction of an 50x50x40 millimeter Eulerian material reference system. The position and geometry of the impactor is initialized by means of a shell container representing the external faces of the bullet. The portion T

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