Issue 37

M. Mokhtarishirazbad et alii, Frattura ed Integrità Strutturale, 37 (2016) 114-123; DOI: 10.3221/IGF-ESIS37.16 116 Figure 1 : Geometry of the tubular dog-bone specimen with central hole. All dimensions are in mm. Figure 2 : Definition of axial and shear stress amplitude. Specimen name Hole diameter (mm) Cross section area (mm 2 ) σ max τ max σ OL τ OL S1 0.333 73.4 240 138.5 - - S2 0.336 74.8 240 138.5 336 194 Table 3. Axial and shear stress values for specimens with and without overload cycle. Figure 3 : The position of virtual extensometers for COD examination. The white bold mark shows the crack-tip position.