Ductile tearing of aluminium plates: experiments and modelling

Abstract This paper presents an experimental and numerical study on quasi-static ductile tearing of thin plates the aluminium alloy AA6016 in three tempers. Depending temper, main fracture mechanism plate tests changes from grain boundary failure to coalescence voids nucleated at constituent particles. The experiments are complemented by nonlinear finite element simulations using enriched Gurson–Tvergaard–Needleman (GTN) model describe material response. onset accelerated void growth is initiated either incipient softening (named ) or occurrence strain localization ). It was found that takes place a critical porosity $$f_\text{ c }$$ f c , which depends current hydrostatic deviatoric stress states. While path, appears be path independent. A third method proposed }(T,L)$$ ( T , L ) ), where surface } = f_\text{ }\left( T,L\right) $$ = used determine when starts. generated beforehand solving for under proportional states defined triaxiality T Lode parameter L . By comparing experiments, it performed well wide range does not portray dependence therefore less versatile. gave similar predictions, but some minor differences were observed two