ANISOTROP1C DUCTILE RUPTURE

摘要

The aim of this article is to study the effect of inclusion shape on ductile fracture anisotropy of a C- Mn steel containing MnS inclusions. For this purpose, a Gurson-like model incorporating void shape effect has been implemented in a finite element software.The model is tested for varying stress triaxialities and initial void aspect ratios. It is then applied to discuss the differences in strains to failure measured on axisymmetric notched bars tested along different directions. In order to determine the appropriate initial parameters, namely the void shape and the volume fraction, inclusion morphology and distribution are characterized using quantitative metallography.