PSI - Issue 13

Yuki Nishizono et al. / Procedia Structural Integrity 13 (2018) 1817–1827 —‹ ‹•Š‹œ‘‘ Ȁ –”—…–—”ƒŽ –‡‰”‹–› ”‘…‡†‹ƒ ͲͲ ሺʹͲͳͺሻ ͲͲͲ – ͲͲͲ

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5. Conclusion Based on the conventional explanation that the magnitude relation between crack driving force and crack propagation resistance determines brittle crack propagation/arrest, the authors calculated d characterizing the dynamic crack driving force and selected the appropriate test specimen shape on the devised and simplified FEM model assuming constant crack velocity and flat crack front. The authors evaluated arrest toughness of two types of steel plates by the simplified evaluation method developed in this study and confirmed high correlation with arrest toughness by ESSO tests. The authors think that the simplified evaluation method by which we can evaluate ca of at least 6000 N/mm 3/2 will cover the needs of a wide range of industrial fields. Acknowledgements In this study, financial support from Fundamental Research Developing Association for Shipbuilding and Offshore, REDAS, is gratefully acknowledged. This work was also supported by JSPS KAKENHI Grant Numbers 18H05337, 17H01354. Abaqus Theory Guide , Simulia, Abaqus 6.14. Dowling, E. N., Mechanical behavior of materials dowling, Prentice Hall College Div. Hilber, H.M., Hughes, T.J.R., and Taylor, R.L., “Improved Numerical Dissipation for Time Integration Algorithms in Structural Dynamics, Earthquake Engineering and Structural Dynamics, Volume 5, Pages 283-292,1977. Ishikawa, T., Haze, T., Mabuchi, H., “Evaluation methods for crack arrestability in steels”, CAMP-ISIJ, Vol.4(1991)-918. Kawabata, T., Nishizono, Y., Aihara, S., “Brittle crack propagation behavior in a member subjected to bending load”, Theoretical and Applied Fracture Mechanics, Volume 92, Pages 266-275, 2017. Kobayashi, A.S., Emery, A.F. and Mall, F., “Dynamic Finite Element and Dynamic Photoelastic Analysis of Crack Arrest in Homalite-100”, Fast Fracture and Crack Arrest, ASTM STP627, eds. Hahn, G.T. and Kanninen, M.F., American Society for Testing and Materials, Philadelphia, 1977, Pages 95-108. Machida, S., Matoba, M., Yoshinari, H., and Tone, C., “AModel for Brittle Crack Propagation and Arrest in Structural Steel”, Journal of the Society of Naval Architects of Japan, Issue 172, Pages 637-647, 1992. Nippon Kaiji Kyokai, Guidelines on brittle crack arrest design, 2009. Okawa, T., Shirahata, H., Nakashima, K., Yanagita, K. and Inoue, T., “Simplified Evaluation of Brittle Crack Arrest Toughness in Heavy-Thick Plate by Combined Small-scale Tests”, The Twenty-fifth International Ocean and Polar Engineering Conference, 2015. The Japan Welding Engineering Society, the JWES Standards, “Evaluation Criterion of Rolled Steels for Low Temperature Application”, WES 3003, 1995. The Japan Welding Engineering Society, the JWES Standards, “Simplified test method for brittle crack arrest toughness using press-notched bend specimen”, WES-TS 2816, 2015. Tonsho, F., Kawabata, T. and Aihara, S., “Investigation of Driving Force for Crack Propagation around the Arrest Point On Temperature-Gradient Crack Tests in Steels”, CAMP-ISIJ, Vol.28(2015)-768. References