On the influence of microscale inertia on dynamic ductile crack extension
1 ENSTA Bretagne, LBMS, 2 rue François Verny, 29806 Brest Cedex 9, France
2 Université de Lorraine, LEM3, Ile du Saulcy, 57045 Metz Cedex 01, France
The present paper is devoted to the modelling of damage by micro-voiding in ductile solids under dynamic loading conditions. Using a dynamic homogenization procedure, a constitutive damage model accounting for inertial effects due to void growth (microscale inertia or micro-inertia) has been developed. The role played by microscale inertia in dynamic ductile crack growth is investigated with the use of the proposed micromechanical modelling. It is found that micro-inertia has a significant influence on the fracture behaviour. Micro-inertia limits the velocity at which cracks propagate. It also contributes to increase the apparent dynamic toughness of the material.
© Owned by the authors, published by EDP Sciences, 2012