J and CTOD estimation formulas for C(T) fracture specimens including effects of weld strength overmatch
Source abstract
Abstract
This work focuses on an evaluation procedure to determine the elastic–plastic J-integral and Crack Tip Opening Displacement (CTOD) fracture toughness based upon the η-method for C(T) fracture specimens made of homogeneous and welded steels. The primary objective of this investigation is to enlarge on previous developments of J and CTOD estimation procedures for this crack configuration while, at the same time, addressing effects of strength mismatch on the plastic η-factors. The present analyses enable the introduction of a larger set of factors η for a wide range of crack sizes (as measured by the a/W-ratio) and material properties, including different levels of weld strength mismatch, applicable to pipeline and pressure vessel steels. Very detailed non-linear finite element analyses for plane-strain and 3-D models of C(T) fracture specimens with centerline-cracked welds provide the evolution of load with increased load-line and crack mouth opening displacement required for the estimation procedure. Overall, the present study, when taken together with previous investigations, provides a fairly extensive body of results to determine parameters J and CTOD for different materials using C(T) specimens with varying overmatch conditions.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Fatigue and fracture mechanics · Non-Destructive Testing Techniques · Structural Integrity and Reliability Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (37)
Show source-provided references
1. American Petroleum Institute (2005) Welding of pipelines and related facilities. API 1104
2. American Society for Testing and Materials (2008a) Standard test method for measurement of fracture toughness. ASTM E1820
3. American Society for Testing and Materials (2008b) Standard test method for crack-tip opening displacement (CTOD) fracture toughness measurement. ASTM E1290
4. Anderson TL (2005) Fracture mechanics: fundaments and applications, 3rd edn. CRC Press, New York10.1201/9781420058215 ↗
5. British Standard (1991) Fracture Mechanics Toughness Tests, BS 7448
6. British Standards Institution (1991) Guidance on methods for assessing the acceptability of flaws in fusion welded structures. BSI published document PD6493
7. British Standard Institution (1999) Guide on methods for assessing the acceptability of flaws in metallic structures. BS7910
8. Burdekin FM, Dawes MG (1971) Practical use of linear elastic and yielding fracture mechanics with particular reference to pressure vessels. In: Proceedings of the Institute of Mechanical Engineers Conference, London, pp 28–37
9. Burdekin FM, Stone DEW (1966) The crack opening displacement approach to fracture mechanics in yielding materials. J Strain Anal 1: 144–15310.1243/03093247V012145 ↗
10. Canadian Standard Association (2007) Oil & gas pipeline systems. CSA Z662
11. Cravero S, Ruggieri C (2007) Estimation procedure of J resistance curves for SE(T) fracture specimens using unloading compliance. Eng Fract Mech 74: 2735–275710.1016/j.engfracmech.2007.01.012 ↗
12. Det Norsk Veritas (2010) Submarine pipeline systems. DNV OS-F101
13. Donato GHB, Magnabosco R, Ruggieri C (2009) Effects of weld strength mismatch on J and CTOD estimation procedure for SE(B) specimens. Int J Fract 159: 1–2010.1007/s10704-009-9377-9 ↗
14. Eripret C, Hornet P (1997) Fracture toughness testing procedures for strength mis-matched structures. In: Schwalbe KH, Koçak M (eds) Mis-matching of interfaces and welds. GKSS Publications, Geestchacht, Germany
15. Gullerud A, Koppenhoefer K, Roy A, Roy Chowdhury S, Walters M, Bichon B, Cochran K, Dodds R (2004) WARP3D: dynamic nonlinear fracture analysis of solids using a parallel computers and workstations. Structural research series (SRS) 607. UILU-ENG-95-2012. University of Illinois at Urbana-Champaign
16. Harrison JD, Dawes MG, Archer GL, Kamath MS (1979) The COD approach and its application to welded structures. In: Landes JD, Begley JA (eds) Elastic–plastic fracture, ASTM STP 668. American Society for Testing and Materials, West Conshohocken, pp 606–63110.1520/STP35850S ↗
17. Hornet P, Eripret C, Hao S (1997) “Experimental J Estimation from a Load-CMOD Curve for Mis-Matched SENB and CCT Specimens”. In: Mis-Matching of Interfaces and Welds, Schwalbe KH, Koçak M, Eds, GKSS Publications, Geestchacht, Germany
18. Hutchinson JW (1983) Fundamentals of the phenomenological theory of nonlinear fracture mechanics. J Appl Mech 50: 1042–105110.1115/1.3167187 ↗
19. International Organization for Standardization (2002) Metallic materials—unified method of test for the determination of quasistatic fracture toughness. ISO 12135
20. Kanninen MF, Popelar CH (1985) Advanced Fracture Mechanis. Oxford University Press, New york
21. Kim YJ, Budden PJ (2001) Plastic η factors of homogeneous and bi-material SE(T) specimens for toughness and creep crack growth testing. Fatigue Fract Eng Mater Struct 24: 751–76010.1046/j.1460-2695.2001.00436.x ↗
22. Kim YJ, Schwalbe KH (2001) Mismatch effect on plastic yield loads in idealized weldments—I: Weld Centre Cracks. Eng Fract Mech 68: 163–18210.1016/S0013-7944(00)00093-X ↗
23. Kim YJ, Schwalbe KH (2001) Mismatch effect on plastic yield loads in idealized weldments—I: heat affected zone cracks. Eng Fract Mech 68: 183–19910.1016/S0013-7944(00)00094-1 ↗
24. Kim YJ, Schwalbe KH (2001c) Compendium of yield load solutions for strength mis-matched SE(T), SE(B) and C(T) specimens. Eng Fract Mech 68: 1137–115110.1016/S0013-7944(01)00016-9 ↗
25. Kim YJ, Kim JS, Schwalbe KH (2003) Numerical investigation on J-integral testing of heterogeneous fracture toughness testing specimens—part I: weld metal cracks. Fatigue Fract Eng Mater Struct 26: 683–69410.1046/j.1460-2695.2003.00676.x ↗
26. Kirk MT, Dodds RH (1992) Effect of weld strength mismatch on elastic–plastic fracture parameters. Structural research series (SRS) 570. UILU-ENG-92-2008, University of Illinois at Urbana-Champaign
27. Kirk MT, Dodds RH (1993) J and CTOD estimation equations for shallow cracks in single edge notch bend specimens. J Test Eval 21: 228–23810.1520/JTE11948J ↗
28. Panontin TL, Makino A, Williams JF (2000) Crack tip opening displacement estimation formulae for C(T) specimens. Eng Fract Mech 67: 293–30110.1016/S0013-7944(00)00048-5 ↗
29. Paredes M, Ruggieri C (2012) Further results in J and CTOD estimation procedures for SE(T) fracture specimens—part II: center cracked welds. Eng Fract Mech 89: 24–3910.1016/j.engfracmech.2012.03.010 ↗
30. Ruggieri C (2011) FRACTUS2D: numerical computation of fracture mechanics parameters for 2-D cracked solids. EPUSP, University of São Paulo
31. Ruggieri C (2012) Further results in J and CTOD estimation procedures for SE(T) fracture specimens—part I: homogeneous materials. Eng Fract Mech 79: 245–26510.1016/j.engfracmech.2011.11.003 ↗
32. Shih CF (1981) Relationship between the J-integral and the crack opening displacement for stationary and extending cracks. J Mech Phys Solids 29: 305–32610.1016/0022-5096(81)90003-X ↗
33. Sumpter JDG, Turner CE (1976) Method for laboratory determination of Jc. Cracks and fracture, ASTM STP601. American Society for Testing and Materials, West Conshohocken, pp 3–1810.1520/STP28634S ↗
34. Tada H, Paris PC, Irwin GR (2000) The stress analysis of cracks handbook , 3rd edn. American Society of Mechanical Engineers, New York10.1115/1.801535 ↗
35. Wang YY, Kirk MT, Gordon JR, Hornet P, Eripret C (1997) Recommended practice for fracture toughness testing of weldments with strength mismatch. In: Schwalbe KH, Koçak M, (eds) Mis-matching of interfaces and welds. GKSS Publications, Geestchacht, Germany
36. Wolfram Research, Inc. (2010) Mathematica, version 8.0. Champaign, IL
37. Zerbst U, Ainsworth RA, Schwalbe KH (2000) Basic principles of analytical flaw assessment methods. Int J Press Vessel Pip 77: 855–86710.1016/S0308-0161(01)00008-4 ↗