A Micromechanical Model for Ductile Fracture of API X65


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This paper presents a micro-mechanical model of ductile fracture for the API X65 steel, using the Gurson-Tvergaard-Needleman (GTN) model. Experimental tests and FE damage simulations using the GTN model are performed for smooth and notched tensile bars with three different notch radii, from which micromechanical parameters in the GTN model are calibrated. The calibrated micro-mechanical model is applied to quantify pre-strain effects on plastic deformation and fracture of the API X65 steel. Good agreements of the FE damage results with experimental data suggest confidence in the use of the proposed micro-mechanical model to simulate ductile failure of pipelines made of API X65 steels.



Key Engineering Materials (Volumes 321-323)

Edited by:

Seung-Seok Lee, Joon Hyun Lee, Ik Keun Park, Sung-Jin Song, Man Yong Choi




C. K. Oh et al., "A Micromechanical Model for Ductile Fracture of API X65", Key Engineering Materials, Vols. 321-323, pp. 43-47, 2006

Online since:

October 2006




[1] Gurson, A. L., Journal of Engineering Material and Technology, 1977, 99, 2-15.

[2] Maclintock, FA., Journal of Applied Mechanics, 1968, 35, 363-371.

[3] Rice, JR. and Tracey, DM., Journal of the Mechanics and Physics of Solids, 1969, 17, 201-217.

[4] Beremin, F.M., Metallurgical Transactions, 1981, 12A, 723-731.

[5] Rousselier G., Nuclear Engineering and Design, 1987, 105, 97-111.

[6] Tvergaard, V., International Journal of Fracture, 1982, 18, 237-252.

[7] Chu, C. and Needleman, A., Journal of Engineering Materials and Technology, 1980, 102, 249-256.

[8] Tvergaard, V. and Needleman, A., Acta Metallurgica, 1982, 32, 157-169.

[9] Dotta, F. and Ruggieri, C., Int. J. of Pressure Vessels and Piping, 2004, 81, 761-770.

[10] Rivalin, F., Pineau, A., Di Fant, M. and Besson, J. Engineering Fracture Mechanics, 2001, 68, 329-364.

DOI: https://doi.org/10.1016/s0013-7944(00)00108-9

[11] Needleman, A. and Tvergaard, V., Journal of the Mechanics and Physics of Solids, 1987, 35, 151-183.

[12] ABAQUS Version 6. 2-1. User's manual. Hibbitt, Karlsson and Sorensen, Inc, RI; (2001).

[13] Bridgman, P., Studies in Large Plastic Flow and Fracture, McGraw-Hill Book Company, Inc., New York, (1952).

[14] Franklin, A.G., Journal of the Iron and Steel Institute, 1969, 207, 181-186.

[15] Hagiwara, N., Masuda, T. and Oguchi, N., Journal of Pressure Vessel Technology, 2001, 355-361.

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