PSI - Issue 21

Hakan Şahin et al. / Procedia Structural Integrity 21 (2019) 38–45 Sahin H./ Structural Integrity Procedia 00 (2019) 000 – 000

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4. Conclusion Inclined surface cracks under mixed mode loading are investigated parametrically in this paper. A library of stress intensity factor (SIF) distributions for mixed-mode surface cracks in plates subjected to axial stress is obtained. At given values of a/t and a/c , SIFs decrease when the inclination angle is increased. This trend is also observed in different a/t values. When the mode-II stress intensity factors are examined, the maximum SIF values are calculated for inclination angle β = 45 °. The positional angle of the crack front , θ = 0 ° and 180 ° give the maximum mode-II SIFs in each case. On the other hand, mode-III SIF values are maximum at 45 ° inclination angle and the cases with 15 ° -75 ° and 30 ° -60 ° degrees result in the same mode-II and mode-III SIFs, as expected. 5. Acknowledgment The financial support by The Scientific and Technological Research Council of Turkey (TUBITAK) under Project Number: 217M690 for this study is gratefully acknowledged. References ANSYS Version 12.0. 2009. Ansys Inc., Canonsburg, PA, USA Ayhan, A. O., & Nied, H. F. (2002). Stress intensity factors for three ‐ dimensional surface cracks using enriched finite elements. International Journal for Numerical Methods in Engineering, 54(6), 899-921. Ayhan, A. O. (2004). Mixed mode stress intensity factors for deflected and inclined surface cracks in finite-thickness plates. Engineering fracture mechanics, 71(7-8), 1059-1079. Ayhan, A. O. (2007). Mixed mode stress intensity factors for deflected and inclined corner cracks in finite-thickness plates. International Journal of Fatigue, 29(2), 305-317. Frangi, A., Novati, G., Springhetti, R., & Rovizzi, M. (2002). 3D fracture analysis by the symmetric Galerkin BEM. Computational Mechanics, 28(3-4), 220-232. Guozhong, C., Kangda, Z., & Dongdi, W. (1996). Analyses of embedded elliptical cracks in finite thickness plates under uniform tension. Engineering fracture mechanics, 54(4), 579-588. Kurt, E., & Ayhan, A. O. (2019). Three-dimensional mixed-mode stress intensity factors for deflected internal surface cracks in thin and midsize thick-walled spherical pressure vessels. International Journal of Pressure Vessels and Piping, 171, 10-33. Liao, C. Y., & Atluri, S. N. (1989). Stress intensity factor variation along a semicircular surface flaw in a finite-thickness plate. Engineering fracture mechanics, 34(4), 957-976. Livieri, P., & Segala, F. (2016). Stress intensity factors for embedded elliptical cracks in cylindrical and spherical vessels. Theoretical and Applied Fracture Mechanics, 86, 260-266. Newman Jr, J. C., & Raju, I. S. (1981). An empirical stress-intensity factor equation for the surface crack. Engineering fracture mechanics, 15(1 2), 185-192. Okada, H., Koya, H., Kawai, H., Li, Y., & Osakabe, K. (2016). Computations of stress intensity factors for semi-elliptical cracks with high aspect ratios by using the tetrahedral finite element (fully automated parametric study). Engineering Fracture Mechanics, 158, 144-166. Pook, L. P., Campagnolo, A., Berto, F., & Lazzarin, P (2015). Coupled fracture mode of a cracked plate under anti-plane loading. Engineering Fracture Mechanics, 134, 391-403. Raju, I. S., & Newman Jr, J. C. (1979). Stress-intensity factors for a wide range of semi-elliptical surface cracks in finite-thickness plates. Engineering fracture mechanics, 11(4), 817-8297. Shah, R. C., & Kobayashi, A. S. (1973). Stress intensity factors for an elliptical crack approaching the surface of a semi-infinite solid. International Journal of Fracture, 9(2), 133-146. Wang, X., & Lambert, S. B. (1995). Stress intensity factors for low aspect ratio semi-elliptical surface cracks in finite-thickness plates subjected to