Growth and Coalescence of non Spherical Voids in Metals Deformed at Elevated Temperature
Void growth and coalescence in ductile materials deformed at elevated temperatures is analysed by finite element calculations and an analytical approach. Complex axisymmetric initial void shapes (varying continuously from a sphere to a cylinder) are considered. The void growth model is based on an extension of Gurson's model to elasticviscoplastic solids. The variation of the void volume fraction at void coalescence with the strain rate hardening of the matrix material, the remote stress triaxiality and the initial void shape are analysed.
Antoine BALDACCI, Helmut KLÖCKER, Julian DRIVER
Void growth, hot ductility, complex shapes.