Abstract
The modelling of defects occurrence in metal forming is a real challenge for the engineer concerned with processing of new materials or new geometries. From an economical point of view it is important to be able to predict before setting the process if it leads or not to defects. As fracture in metal forming is mainly due to the development of ductile damage or plastic instabilities, a review of some models and methods is presented, applicable both in quasi-static as well as in transient dynamic situations, for cold or hot forming conditions. Numerical modelling of damage development in some industrial forming processes illustrates the possibilities of the proposed approach.
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