Guidelines for Applying Cohesive Models to the Damage Behaviour of Engineering Materials and Structures

Micromechanisms of fracture in nodular cast iron: From experimental findings towards modeling strategies – A review

“…[104] and references therein). To the authors' knowledge the cohesive zone approach was not applied to NCI yet either.…”

Numerical Simulation and Experimental Investigation of the Fracture Behaviour of an Electron Beam Welded Steel Joint

“…The T 0 -value for the BM and the HAZ is found to be 1180 MPa and 1350 MPa respectively, as shown in Fig. 6.17 In order to select the more suitable TSL shape, one single element Gurson model was adopted, which was discussed by Schwalbe [Schwalbe et al, 2009] Additionally, the cohesive zone model is considered as a phenomenological model and can be used to study arbitrary fracture (ductile and brittle fracture). It is concluded that the cohesive zone model is the best suited for the investigation of the fracture behavior of S355 electron beam welded joints as it can simulate both ductile and brittle fracture.…”

“…Dugdale and Barenblatt assume that the crack consists of two parts: the stress-free part and the parts loaded by cohesive stresses. In 1960, Dugdale introduced a strip-yield model where he assumed that the cohesive stress is equal to the yield stress and the material is supposed to perform as elastic-ideally plastic [Schwalbe et al, 2009], as shown in Fig. 2.8.…”

“…2.8. The model presented by Barenblatt adopted a cohesive law to describe the decohesion of atomic lattices [Schwalbe et al, 2009] where the stresses in the ligament of the crack follows a prescribed distribution σ(x) which is related to the material, as shown in Fig. 2.9.…”

“…6.1) is used for the simulation. Because the tensile test of the notched round specimen from the FZ is not available in experiment, according to the discussion of Brocks , the cohesive strength T 0 can be roughly estimated as three times of the yield stress which is a rough estimation for steel, values are also reported between 2.5 and 5 [Schwalbe et al, 2009]. In the calculations, as the yield stress of the FZ is 513 MPa, …”