PSI - Issue 21

Emre Kurt et al. / Procedia Structural Integrity 21 (2019) 21–30 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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FCPAS prediction for crack-1 Simulation result of Shu et al. (2017) FCPAS prediction for crack-2 Experimental result of Shu et al. (2017)

x coordinate of crack tip (mm)

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Fig. 11. Comparison of crack growth rates predicted from the 3-D developed criteria by FCPAS and from the reference study (Shu et al. (2017)).

4. Summary and Conclusion In this study, results from two applications on three-dimensional mixed mode fatigue crack propagation using the in- house developed “Fracture and Crack Propagation Analysis System (FCPAS)” are presented. A new developed 3 D crack growth criteria is used in the crack propagation analyses. The results show that very good agreements are obtained between the results of the current studies and those of application examples in terms of both evolving crack surfaces and crack growth lives. Therefore, it is concluded that the applied method and the new developed 3-D crack growth criteria are capable of accurately predicting linear elastic three-dimensional mixed mode fatigue crack propagation problems. 5. Acknowledgement The financial support by The Scientific and Technological Research Council of Turkey (TUBITAK) under Project Number: 217M690 for this study is gratefully acknowledged. ANSYS, 2009. Theory manual version 12.0. Canonsburg, PA, USA: Ansys Inc. Ayhan, A. O., Nied, H. F., 1998. FRAC3D-finite element based software for 3-D and generalized plane strain fracture analysis. SRC technical report. Ayhan, A. O., Nied, H. F., 2002. Stress intensity factors for three-dimensional surface cracks using enriched elements. International Journal for Numerical Methods in Engineering 54:899 – 921. Ayhan, A. O., 2011. Simulation of three-dimensional fatigue crack propagation using enriched finite elements. Computers & Structures 89(9-10), 801-812. Citarella, R, Lepore, M., Shlyannikov, V., Yarullin, R., 2014. Fatigue surface crack growth in cylindrical specimen under combined loading. Engineering Fracture Mechanics 131: 439-453. Citarella, R., Lepore, M., Maligno, A., Shlyannikov, V., 2015. FEM simulation of a crack propagation in a round bar under combined tension and torsion fatigue loading. Frattura ed Integrità Strutturale 31: 138-147. Davidson, B. D., Sediles, F. O., 2011. Mixed-mode I – II – III delamination toughness determination via a shear – torsion-bending test. Composites: Part A. 42: 589-603. Demir, O., Ayhan, A. O., İ riç, S., 2017. A new specimen for mixed mode-I/II fracture tests: modeling, experiments and criteria development. Engineering Fracture Mechanics 178:457 – 76. Hannemann, R., Köster, P., Sander, M., 2017. Investigations on crack propagation in wheelset axles under rotating bending and mixed mode loading. Procedia Structural Integrity 5: 861-868. References