Multiple Cracks Interaction Model under Creep Conditions

Article Preview

Abstract:

Multiple flaws are often found in many high-temperature structural components. The interaction and coalescence of multiple cracks may significantly influence the service lives of these high-temperature components. In this paper, the interaction effect on multiple cracks is investigated under creep conditions. At the same time, interaction is considered during crack growth calculation by including the appropriate magnification factors in the calculations of creep fracture parameters. Based on these analyses, the assessment method of high-temperature structure containing multiple flaws is developed.

You might also be interested in these eBooks

Info:

Periodical:

Pages:

574-579

Citation:

Online since:

June 2013

Export:

Price:

Permissions CCC:

Permissions PLS:

Сopyright:

© 2013 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] T.H. Leek, I.C. Howard: An Examination of Methods of Assessing Interacting Surface Cracks by Comparison with Experimental Data, International Journal of Pressure Vessels and Piping, vol.68 (1996), pp.181-201

DOI: 10.1016/0308-0161(94)00052-2

Google Scholar

[2] R.A. Collins, D.J. Cartwright: An Analytical Solution for Two Equal-Length Collinear Strip Yield Cracks, Engineering Fracture Mechanics, vol.68 (2001), pp.915-924

DOI: 10.1016/s0013-7944(00)00086-2

Google Scholar

[3] M. Kamaya: Growth evaluation of multiple interacting surface cracks. Part I: Experiments and simulation of coalesced crack, Engineering Fracture Mechanics, vol.75 (6) (2008), pp.1336-1349

DOI: 10.1016/j.engfracmech.2007.07.015

Google Scholar

[4] API 579-1/ASME FFS-1: Fitness-for-service, section 9. American Society of Mechanical Engineers (2007)

Google Scholar

[5] ASME: Boiler and pressure vessel design code Section XI: Rules for inservice inspection of nuclear power plant components. American Society of Mechanical Engineers (2004)

DOI: 10.1115/1.859872.ch29

Google Scholar

[6] J.L. Bassani, F.A. McClintock: Creep Relaxation of Stress around a Crack Tip, International Journal of Solids and Structures, vol.17 (1981), pp.479-492

DOI: 10.1016/0020-7683(81)90055-x

Google Scholar

[7] F.Z. Xuan, S.T. Tu, Z.D. Wang: C* Estimation for Cracks in Mismatched Welds and Finite Element Validation, International Journal of Fracture, vol.126 (2004), pp.267-280

DOI: 10.1023/b:frac.0000026578.03989.79

Google Scholar

[8] JD Landes, JA. Begley: A fracture mechanics approach to creep crack growth, ASTM STP, vol.590 (1976), p.128–148

DOI: 10.1520/stp33943s

Google Scholar

[9] ABAQUS: Version 6.7(2006)

Google Scholar

[10] D.P. Rooke, D.J. Cartwright: Compendium of Stress Intensity Factors. H.M.S.O.(1976)

Google Scholar