PSI - Issue 2_A

Yo Nishioka et al. / Procedia Structural Integrity 2 (2016) 2558–2565 Author name / Structural Integrity Procedia 00 (2016) 000–000

2565

8

crack length becomes large. It can be said that these results shows the effect of 3D qualitatively. Though the plate thickness is divided by an element in this research, more quantitative results can be obtained if the thickness is divided by multiple elements.

2.000

0,6

(b)

(a)

Mid thickness Surface

Elasto-plastic Elastic

1.500

0,4

1.000

0,2

500

Crack velocity [m/s]

0

0

difference of crack length [mm]

50

60

70

80

90

100

50

60

70

80

90

100

Crack length [mm]

Crack length [mm]

Fig. 9 (a) History of crack velocity (b) Difference of crack length for each condition

5. Conclusion In the present research, we evaluated the nodal force release method quantitatively. It was found that better way to release nodal force was Linear. We developed the 2D model to simulate crack propagation based on local fracture stress criterion and conducted verification. The history of crack velocity obtained by the model is consistent with the exact solution. Finally, we extend it to the 3D model. It exhibited behaviour of crack front considering the effect of 3D qualitatively. The basis of the model which can evaluate the effect of structural arrest is established. Acknowledgements Part of this study was supported by JSPS KAKENHI Grant Number 15H06661. References Aihara, S., Watabe, Y., Shibanuma, K., Inoue, T., Koseki, T., 2012. Numerical and experimental analysis of brittle crack propagation and arrest in steels, Proc. 22th Int. Offshore and Polar Eng. Conf., ISOPE2012 Broberg, K. B., 1999, Cracks and Fracture, Academic Press Dassault Systems. 2014. SIMULIA Abaqus Analysis User's Manual Version 6.14 Hajjaj, M., Berind, C., Bompard, P., Bugat, S.,2008. Analyses of cleavage crack arrest experiments: influence of specimen vibration. Engineering Fracture Mechanics 75, 1156-1170 Kawabata, T., Maeda, T., Inami, A., Kubo, S., Hiramatsu, H., Matsuda, H., Michida, K., Nishiyama, G., Kiyosue, T., Matsuura, K., Okamoto, K., 2007. Investigation on brittle crack propagation behavior of heavy thick shipbuilding steel plates : Report4; Trial of establishment of dynamic finite element method analysis for the brittle crack propagation of EH36 steel plate, Journal of Japan Society of Naval Architecture and Ocean Engineering 5, 143-146 Kobayashi, A. S., Seo, K., Jou, J. Y., Urabe, Y., 1980, A dynamic analysis of modified compact-tension specimens using homalite-100 and polycarbonate plates, Experimental Mechanics 20, 73-79 Kuna, M., 2012. Finite Elements in Fracture Mechanics Theory-Numerics-Applications, Springer Machida S, Yoshinari H, Yasuda M, Aihara S, Mabuchi H., 1995. Fracture mechanical modeling of brittle fracture propagation and arrest of steel (1) - A fundamental model. Bulletin of The Society of Naval Architects of Japan 177, 243-257. P.S.Yu, C.Q.Ru, 2015, Strain rate effects on dynamic fracture of pipeline steels - Finite element simulation, International Journal of Pressure Vessels and Piping 126-127 P.S.Yu, C.Q.Ru, 2014, A strain rate-dependent finite element model of drop-weight tear tests for pipeline steels, IPC2014, Shibanuma, K., Yanagimoto, F., Namegawa, T., Suzuki, K., Aihara, S., 2016. Brittle crack propagation/arrest behavior in steel plate –Part I: Model formulation, Engineering Fracture Mechanics Shibanuma, K., Yanagimoto, F., Namegawa, T., Suzuki, K., Aihara, S., 2016. Brittle crack propagation/arrest behavior in steel plate –Part II: Validation and discussion, Engineering Fracture Mechanics.