For Libraries For Publication Open Access Downloads About Us Contact Us
Paper Titles
Principal Stress Separation Using a Combination of Photoelasticity and Thermoelastic Stress Analysis under Biaxial Stress
p.1214
Effect of Heat Treatment on the Properties of Inconel X-750
p.1220
Research on Intercritical Rolling of 0.2C-1.5Si-1.5Mn TRIP Steels by Thermo-Mechanical Simulation
p.1223
Micro Behavior Study of Non-Metallic Inclusion in High Strength Shaft Steel
p.1229
Mechanism of Delamination and Its Effects on Fracture of Surface Crack Bodies in Ductile Pipeline Steel
p.1235
Analysis of Underground Pipelines Subjected to Frost Heaving Forces
p.1241
Effect of the Elastic Restraint by Adjacent Plate Component on the Local Buckling of Orthotropic Box-Shape Flexural Members
p.1253
Buckling Behavior of Pultruded Monosymmetric Members
p.1259
Prediction of Elastic Properties in Discontinuous Composite Materials
p.1265

Mechanism of Delamination and Its Effects on Fracture of Surface Crack Bodies in Ductile Pipeline Steel

Article Preview

Abstract:

The effects of three-dimensional crack configurations and delaminations on fracture mechanism and fracture toughness Jc of pipeline steel were investigated experimentally by use of tensile specimens having surface cracks of different depth to length ratio. Comparison with test results of through-thickness cracks and mechanism analyses are made as well. When 3D stress constraint is larger than the strength in the thickness direction the delamination forms. As no delamination occurs in the interior of a surface crack, the constraint is higher and the fracture toughness is lower than that of the through-thickness cracks. Therefore, the nominal fracture toughness obtained from through-thickness cracked specimens is not a real material constancy, and not suitable for safety assessment of pipelines.

You might also be interested in these eBooks
Advances in Fracture and Strength View Preview

Info:

Periodical:

Key Engineering Materials (Volumes 297-300)

Pages:

1235-1240

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.297-300.1235

Citation:

Cite this paper

Online since:

November 2005

Authors:

Hui Ru Dong, Wanlin Guo, Zheng Yang

Keywords:

Delamination, Ĵ-Integral, Pipeline Steel, Surface Crack

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2005 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] J-M. Pitard-Bouet, M. Seidenfuss, M. Bethmont and K. Kussmaul: Nuclear Engineering and Design Vol. 190 (1999), p.171.

DOI: 10.1016/s0029-5493(98)00322-7

Google Scholar

[2] W. Guo, H. Dong, M. Lu and X. Zhao: Int J. of Press. & Piping Vol. 79 (2002), p.403.

Google Scholar

[3] B.K. Richard, Y. Cheng, D.T. Read and H.I. Mchenry: ASTM STP 803 (1983), p.444.

Google Scholar

[4] I. Milne, R.A. Ainsworth, A.R. Dowling and A.T. Stewart: Int J. of Press. & Piping Vol. 32 (1988), p.3.

Google Scholar

[5] P.J. Buddena, J.K. Sharplesb and A.R. Dowling: Int J. of Pres. & Piping Vol. 77 (2000), p.895.

Google Scholar

[6] IW. Goodall: Int J. of Press. & Piping Vol. 78 (2001), p.687.

Google Scholar

[7] I. Sattari-Far: Int J. of Pres. & Piping Vol. 57 (1994), p.237.

Google Scholar

[8] A.G. Miller: Int J. of Pres. & Piping Vol. 32(1988), p.197.

Google Scholar

[9] K. Yun-Jae, S. Do-Jun, C. Jae-Boong, and K. Young-Jin: Eng. Fracture Mech. Vol. 69 (2002), p.1447.

Google Scholar

[9] JC Jr. Newman and IS. Rajus: Eng. Fracture Mech. Vol. 15(1981), p.185.

Google Scholar

© 2025 Trans Tech Publications Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies. For open access content, terms of the Creative Commons licensing CC-BY are applied.
Scientific.Net is a registered trademark of Trans Tech Publications Ltd.