Computation of Mixed Mode Stress Intensity Factors in 3D Functionally Graded Material Using Tetrahedral Finite Element
In this paper, a formulation of interaction integral method for the calculation of Stress Intensity Factor (SIF) for three-dimensional cracks in functionally graded material (FGM) is discussed. The SIF evaluations were carried out using somewhat rough FEM model around the crack front while maintaining the path independent property of the interaction integral. The proposed method was examined on both homogeneous material and FGM, for the accuracies of evaluated SIFs under mode I and mixed mode loadings. The results indicate that the present interaction integral method maintain its path independent property.
KeywordsStress intensity factor Interaction integral method Domain integral method Fracture mechanics Finite element method
A part of present research performed by Hiroshi Okada was supported by JSPS (Japan Society for Promotion of Science) Grand-in Aid for scientific Research (c) No. 16K05988. The support is gratefully acknowledged.
- 2.Nakamura, T., Taniguchi, K., Hirano, S., Narita, M., Sato, T.: Stress corrosion cracking in welds of reactor vessel nozzle at OHI-3 and of other vessel’s nozzle at Japan’s PWR plants. ASME PVP: 2009-77344 (2009)Google Scholar
- 4.Okada, H., Kawai, H., Tokuda, T., Fukui, Y.: Development of automated crack propagation analysis system (2nd report, the crack propagation analysis system and finite element model generation for the crack propagation). Trans. Jpn. Soc. Mech. Eng. Ser. A 76(772), 1681–1688 (2010)Google Scholar
- 7.Murakami, Y., et al.: Stress Intensity Factors Handbook Volume 2, 1st edn. Committee on Fracture Mechanics. The Society of Materials Science, Japan (1987)Google Scholar