Development of Fracture Assessment Standards in Japan with Weibull Stress


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This paper describes the fracture assessment standards developed in Japan, where the Weibull stress is implemented to correct the CTOD toughness for constraint loss in structural components. ISO 27306 and WES 2808 (Japan Welding Engineering Society Standard) are presented. Discussion is given on the effects of strength mismatch and residual stress in welds.



Materials Science Forum (Volumes 783-786)

Main Theme:

Edited by:

B. Mishra, M. Ionescu and T. Chandra




F. Minami, "Development of Fracture Assessment Standards in Japan with Weibull Stress", Materials Science Forum, Vols. 783-786, pp. 63-71, 2014

Online since:

May 2014





* - Corresponding Author

[1] F.M. Beremin, Metall Trans, 14a (1983) 2277–2287.

[2] C.S. Wiesner, The Local Approach, to cleavage fracture, An Abington Publ Special Rept, Cambridge, England, (1996).

[3] F. Minami, M. Toyoda, Evaluation of fracture toughness results and transferability to fracture assessment of welded joints, in: T.L. Panontin, S.D. Sheppard (Eds. ), Fatigue and Fracture Mech, Vol. 29, ASTM STP 1332, 1999, p.315–340.


[4] F. Minami, M. Ohata et al., Engng Fract Mech, 73 (2006) 1996–(2020).

[5] ISO 27306: 2009, Metallic materials – Method of constraint loss correction of CTOD fracture toughness for fracture assessment of steel components.


[6] WES 2808: 2003, Method of assessing brittle fracture in steel weldments subjected to large cyclic and dynamic strain, The Japan Welding Engineering Society.

[7] F. Minami, T. Katou, T. Nakamura, K. Arimochi, in: Proc. of 18th OMAE Conf., St. John's Newfoundland, OMAE99/MAT-2130, (1999).

[8] F. Minami, K. Arimochi, Constraint correction of fracture toughness CTOD for fracture performance evaluation of structural components, in: M.T. Kirk, M.E. Natishan (Eds. ), Predictive Material Modeling, ASTM STP 1429, 2004, p.48–66.


[9] WES 2805: 2011, Method of assessment for flaws in fusion welded joints with respect to brittle fracture and fatigue crack growth, The Japan Welding Engineering Society.

[10] J.C. Newman, I.S. Raju, NASA Technical Memorandum 85793, (1984).

[11] T. Nakagomi, T. Yamad, S. Hisada, I. Okabayashi, Journal of Construction Steel, 3 (1995) 387–394 (in Japanese).

[12] APD-II Committee, Fracture of beam-to-column joints, 1999, JWES-IS-9901, The Japan Welding Engineering Society.

[13] F. Minami, M. Ohata, Welding in the World, 51 (2007) 22–33.

[14] F. Minami, M. Ohata, T. Manabe, Y. Chiba, K. Murayama, Welding in the World, 53 (2009) 140–150.

[15] F. Minami, M. Ohata, Y. Chiba, Constraint-based assessment of fracture, in: Proc. of International Conference on Trends in Welding, 2012, Paper ID 30730.

[16] F. Minami, Y. Takashima, M. Ohata, International Journal of Offshore and Polar Engineering, 21 (2011) 129–140.

[17] Y. Yamashita, F. Minami, Engng Fract Mech, 77 (2010) 2213–2232.

[18] B.A. Bilby, A.H. Cottrell, E. Smith, K.H. Swinden, Proc. of the Royal Society of London, Vol. A272, 1963, p.304–314.