Relating matrix stress to local stress on a hard microstructural inclusion for understanding cleavage fracture in high strength steel

Abstract Macroscale cleavage fracture toughness of high strength steels is strongly related to the hard microstructural inclusions. Therefore, an accurate determination local stress on these inclusions based matrix necessary for statistical modelling macroscale fracture. This paper presents analytical equations quantitatively estimate from far-field matrix. The account inclusion shape, orientation, state and material properties. Finite element a representative volume containing shows that provide representation state. are implemented into multi-barrier model compared with CTOD experiments two different levels constraint.