Prediction of fracture limit curves in sheet metals using a void growth and coalescence model

The prediction of the forming limit curve at fracture (FLCF) is of industrial importance, particularly in sheet metal stretching where a successful process is controlled by fracture instead of necking. In this work an analytical model is proposed to predict FLCF for sheet metals which are biaxially stretched under various loading paths. The model considers growth and coalescence of voids nucleating at inclusions in a sheet metal matrix...