Fatigue of V-notched ZK60 magnesium samples: X-ray damage evolution characterization and failure prediction

Experimental characterization and theoretical prediction of quasi‐static fracture behavior of notched ZK60‐T5 Mg samples

“…Due to the unavailability of fracture toughness for the studied material, the critical radius cannot be evaluated using Equation 2. Thus, an empirical approach seems to be the most feasible way to determine the critical radius 10,32 . R c can be empirically determined considering the fact that the critical strain energy density value, W c , does not change varying the notch acuity and shape.…”

“…9 However, structural components usually have notches, and such discontinuities are inimical for both static and fatigue resistances. [10][11][12][13] Unfortunately, notches are limiting the diffusion of Mg alloys for structural applications as their fatigue and fracture behavior still has not been fully understood. Some preliminary works on the effect of notches on the fatigue and fracture behavior of Mg alloys have been carried out, with a predominant focus on the former.…”

“…Unfortunately, notches are limiting the diffusion of Mg alloys for structural applications as their fatigue and fracture behavior still has not been fully understood. Some preliminary works on the effect of notches on the fatigue and fracture behavior of Mg alloys have been carried out, with a predominant focus on the former 10,14,15 . The fracture behavior of Mg alloys is in fact quite overlooked, and the majority of the few available works focuses on the effect of notches on AZ alloys.…”

“…Some preliminary works on the effect of notches on the fatigue and fracture behavior of Mg alloys have been carried out, with a predominant focus on the former. 10,14,15 The fracture behavior of Mg alloys is in fact quite overlooked, and the majority of the few available works focuses on the effect of notches on AZ alloys. Yan et al, 16 for example, investigating the deformation and failure behavior of AZ91 alloy, found that the presence of notches decreases the ductility, similarly to what is reported in Yan et al 17 Interestingly, despite decreasing the ductility, the presence of notches was found to increase the strength of AZ alloys.…”

Estimation of Mode I Fracture of U-Notched Polycarbonate Specimens Using the Equivalent Material Concept and Strain Energy Density

“…However, such models require extensive computational effort. Engineering design models such as the strain energy density (SED) [23] and the theory of critical distance (TCD) [24] have been successfully used to analyze the failure of notched members with different notch geometries and materials, and under both static and cyclic loading [25][26][27][28][29]. A key advantage of these models is that they do not require elastic-plastic or complex computational analyses and yet provide accurate predictions.…”