Experimental Determination And
Computational Modelling Of The Damage
Development During Ductile Fracture Of
A Free-cutting Steel
Author(s)
R. Schiffmann, J. Heyer, W. Dahl & W. Bleck
Abstract
Ductile fracture of metallic materials is caused by micromechanical damage
developing during plastic deformation and finally leading to the initiation and
propagation of a crack. Usually the typical damage mechanism is micro-void
growth. To characterise this process the micromechanisms of damage have to be
taken into regard ("continuum damage mechanics", "local approach"). Local
stress and strain properties are calculated by FEM-models to be used for the
computational determination of the damage indicators. These damage properties
should be able to characterise fracture or crack initiation behaviour independent
of stress state (stress triaxiality) or loading history (change of stress triaxiality).
Experiments on diff
Keywords
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