PSI - Issue 39

Jesús Toribio et al. / Procedia Structural Integrity 39 (2022) 484–487 Author name / Procedia Structural Integrity 00 (2021) 000–000

487

4

m=2 ( ε /D) =0.0001 0

m=3 ( ε /D) =0.0001 0

m=4 ( ε /D) =0.0001 0

m=3 ( ε /D) =0.001 0

m=2 ( ε /D) =0.001 0

m=4 ( ε /D) =0.001 0

m=2 ( ε /D) =0.01 0

m=4 ( ε /D) =0.01 0

m=3 ( ε /D) =0.01 0

Fig. 3. Crack paths in eccentric CCRB under tensile loading.

4. Conclusions In a circumferentially cracked round bar CCRB whose circular ligament presents a certain degree of eccentricity in relation to the bar axis, the crack growth by subcritical fatigue makes the ligament eccentricity increase. This phenomenon is accelerated by the increment of the initial ligament eccentricity and by the increase of the Paris exponent m of the material References Kim, I., Zhao, Y., Choi, B.-H., Lee, J.M., Lee, K.-S., Lee, J.M., 2013. Numerical analysis of asymmetric fatigue crack growth behaviors of circular notched bar specimen resulting from various geometric misalignments. Engineering Fracture Mechanics 108, 50–64. Stark, H.L., Ibrahim, R.N., 1986. Estimating fracture toughness from small specimens. Engineering Fracture Mechanics 25, 395–401. Yngvesson, M., 2000. Eccentric circumferential cracks in cylindrical specimens. International Journal of Fracture 102, L9–L14. Zhao, Y., Kim, I., Choi, B.-H., Lee, J.M., 2011. Variation of the fatigue lifetime with the initial notch geometry of circular notched bar specimens. International Journal of Fracture 167, 127–134.