Impact velocities for incipient and developed damage condition for AA1000-O aluminum alloy in symmetric Taylor impact tests (rod-on-rod, ROR) were predicted by means of numerical simulation. The material plastic flow was modelled using a modified version of the Rusinek-Klepaczko model and damage calculations were carried out using a continuum damage mechanics (CDM) model extended to account for pressure effect on damage parameters. Model parameters have been identified based on traction test results. Numerical simulations of ROR, also considering the statistic variation on the damage parameters, were carried out to predict damage development and spatial distribution at different impact velocities. These results have been validated comparing with 3D maps of nucleated voids obtained with X-ray CT scan.
Numerical simulation and validation of damage in AA1100 aluminum symmetric Taylor impact (ROR)
Bonora, Nicola
;Ruggiero, Andrew;Iannitti, Gianluca;Gentile, Domenico;Testa, Gabriel
2018-01-01
Abstract
Impact velocities for incipient and developed damage condition for AA1000-O aluminum alloy in symmetric Taylor impact tests (rod-on-rod, ROR) were predicted by means of numerical simulation. The material plastic flow was modelled using a modified version of the Rusinek-Klepaczko model and damage calculations were carried out using a continuum damage mechanics (CDM) model extended to account for pressure effect on damage parameters. Model parameters have been identified based on traction test results. Numerical simulations of ROR, also considering the statistic variation on the damage parameters, were carried out to predict damage development and spatial distribution at different impact velocities. These results have been validated comparing with 3D maps of nucleated voids obtained with X-ray CT scan.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
