Finite-element analyses of combined void shape and plastic anisotropy effects in ductile fracture

Prediction of ductile fracture in structural metallic materials requires some representation of microstructural effects, including the plastic anisotropy that is associated with initial or induced polycrystalline textures and the microscopic processes of void growth and coalescence. With the objective of characterizing existing continuum models, we present a finite-element study of cylindrical unit cells, consisting of spheroidal voids embedded in an orthotropic Hill matrix, subjected to proportional loading paths. Two-dimensional axisymmetric calculations are employed for the case of transverse isotropy and axisymmetric loading about the void axis. The effective cell model responses are compared with predictions from an extended model of anisotropic void growth, which is the subject of an accompanying paper.

Finite-element analyses of combined void shape and plastic anisotropy effects in ductile fracture Conference Paper