On the accuracy of nominal, structural, and local stress based approaches in designing aluminium welded joints against fatigue
Source abstract
Abstract
This paper investigates the accuracy and reliability of nominal stresses, hot-spot stresses,\ud effective notch stresses, notch-stress intensity factors (N-SIFs) and material length scale\ud parameters in estimating fatigue lifetime of aluminium welded joints. This comparative\ud assessment was based on a large number of experimental data taken from the literature and\ud generated by testing, under either cyclic axial loading or cyclic bending, a variety of\ud aluminium welded structural details. Whenever it was required, stress analyses were\ud performed by solving bi-dimensional linear-elastic finite element models. The obtained\ud results demonstrate that the effective notch stress method, the N-SIF approach, and the\ud Theory of Critical Distances (TCD) provide a more accurate fatigue life estimation in\ud comparison with the other methodologies. In this context, the TCD was seen to be easier to\ud adopt, requiring less computational effort than the effective notch stress method and the NSIF\ud approach. Finally, based on the experimental results being re-analysed, a unifying value\ud of 0.5 mm is proposed for the TCD critical distance, with this value allowing aluminium\ud welded connections to be designed accurately irrespective of joint geometry’s complexity. \ud
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Fatigue and fracture mechanics · Structural Load-Bearing Analysis · Advanced Welding Techniques Analysis
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References (72)
Show source-provided references
1. Review fatigue analysis of welded joints: state of development10.1016/S0951-8339(02)00075-8 ↗
2. Fatigue life improvement by friction stir processing of 5083 aluminium alloy MIG butt welds10.1016/j.tafmec.2014.02.002 ↗
3. Influences of post weld heat treatment on fatigue crack growth behavior of TIG welding of 6013 T4 aluminium alloy joint (part 1. Fatigue crack growth across the weld metal)10.1007/s12206-011-0530-9 ↗
4. Susmel · 2009
5. The Mdified Wöhler Curve Method calibrated by using standard fatigue curves and applied in conjunction with the Theory of critical distances to estimate fatigue lifetime of aluminium weldments10.1016/j.ijfatigue.2008.04.004 ↗
6. Hobbacher A. Recommendations for fatigue design of welded joints and components IIW document XIII-2151-07/XV-1254-07; 2007.
7. Four stress analysis strategies to use the modified Wöhler Curve Method to perform the fatigue assessment of weldments subjected to constant and variable amplitude multiaxial fatigue loading10.1016/j.ijfatigue.2013.12.001 ↗
8. Aygul M. Fatigue analysis of welded structures using the finite element method. Ph.D thesis, Chalmers University of Technology, Gothenburg, Sweden; 2012. Available at: .
9. New developments at the recent update of the IIW recommendations for fatigue of welded joints and components10.1002/stco.201010030 ↗
10. Niemi · 2006
11. Niemi E. Structural stress approach to fatigue analysis of welded components. IIW-document XIII-1819-00/XV-1090-01; 2000.
12. Fatigue design of aluminium welded joints by the local stress concept with the fictitious notch radius of rf=1mm10.1016/j.ijfatigue.2005.10.006 ↗
13. Fatigue design of welded joints from the wrought magnesium alloy AZ31 by the local stress concept with the fictitious notch radii of rf=1.0 and 0.05mm10.1016/j.ijfatigue.2008.05.017 ↗
14. Stress singularities resulting from various boundary conditions in angular corners of plates in extension10.1115/1.4010553 ↗
15. A unified approach to the evaluation of linear elastic stress fields in the neighborhood of cracks and notches10.1007/BF00018497 ↗
16. A notch intensity factor approach to the stress analysis of welds10.1046/j.1460-2695.1998.00097.x ↗
17. A notch stress intensity approach applied to fatigue life predictions of welded joints with different local toe geometry10.1046/j.1460-2695.2003.00586.x ↗
18. Fatigue strength assessments of welded joints: from the integration of Paris’ law to synthesis based on the notch stress intensity factors of the uncracked geometries10.1016/j.engfracmech.2007.03.029 ↗
19. Some new methods for predicting fatigue in welded joints10.1016/S0142-1123(01)00174-8 ↗
20. Fatigue assessment of welded joints using critical distance and other methods10.1016/j.engfailanal.2004.03.005 ↗
21. A novel formulation of the theory of critical distances to estimate lifetime of notched components in the medium-cycle fatigue regime10.1111/j.1460-2695.2007.01122.x ↗
22. Fatigue strength of steel and aluminium welded joints based on generalised stress intensity factors and local strain energy values10.1007/s10704-005-4043-3 ↗
23. Notch stress intensity factors and fatigue strength of aluminium and steel welded joints10.1016/S0142-1123(00)00086-4 ↗
24. Neumann · 1965
25. Anon. Minutes of the meeting of the Working Group on fatigue issues in shipbuilding. The Shipbuilding Engineering Society, Blohm & Voss AG, Hamburg; 1973 .
26. Fatigue of aluminium alloy welded joints
27. Flexural fatigue strength of butt welds in Np.5/6 type aluminium alloy
28. Atzori B, Bufano R. Raccolta di dati sulla resistenza a fatica dei giunti saldati in Al Mg5. University of Bari, Bari, Italy, Report no. 76/4, November 1976.
29. Beurteilung der Schwingfestigkeit von Schweibverbindungen aus AlZnMgi auf dem Weg einer ortlichen Dehnungsmessung
30. Fatigue of aluminium magnesium alloys
31. Effect of mean stress on fatigue properties of aluminum butt-welded joints
32. Fatigue tests on butt welded joints in aluminium alloys HE.30 and NP. 5/6
33. Fatigue strength of welded joints in aluminium alloys
34. Jacoby G. Uber das Verhalten von Schweissverbindungen aus Aluminiumlegierungen bei Schwingbeansprunchung. Dissertation, Technische Hochschule, Hannover; 1961.
35. Axial-tension fatigue in aluminium MIG welding
36. Fatigue properties of plate and butt weldment of 5083-H 113 at 75 and- 300F10.1007/978-1-4757-0534-8_63 ↗
37. Haibach E, Atzori B. A statistical re-analysis of fatigue test results on welded joints in AlMg5. Fraunchofer-Gesellschaft, Report No. FB-116; 1974.
38. Kiefer TF, Keys RD, Schwartzberg FR. Determination of low-temperature fatigue properties of structural metal alloys. Martin Company Report CR; October 1965. p. 65–70.
39. Atzori B, Indrio, P. Comportamento a fatica dei ciunti saldati in Al Zn Mg1, Al Zn4 Mg1 ED Al Mg Si. University of Bari, Bari, Italy, Report No. 76/5, December 1976.
40. Kosteas D. Zur systematische Auwertung von Schwingfestigkeit von Schwingfestigkeitsuntersuchungen bei Aluminiumlegierungen. Dissertation, University of Munich, Germany; 1970.
41. Kosteas D. Versuchsergebnisse aus Schwingfestigkeitsuntersuchungen mit Al Zn Mg1 und Al Mg4.5 Mn. VA Berich NR 5889/2, 25 2; 1973.
42. Fatigue strength improvement of 5083 H11 Al-alloy T-welded joints by shot peening: experimental characterization and predictive approach10.1016/j.ijfatigue.2005.02.001 ↗
43. Maddox SJ. Scale effect in fatigue of fillet welded aluminium alloys. In: Proceedings of the sixth international conference on aluminium weldments, Cleveland, Ohio; 1995. p. 77–93.
44. Meneghetti G. Design approaches for fatigue analysis of welded joints. PhD Thesis, Univeristy of Padova, Padova, Italy; 1998.
45. Riberio AS, Goncalves JP, Oliveria F, Castro PT, Fernandes AA. A comparative study on the fatigue behaviour of aluminium alloy welded and bonded Joints. In: Proceeding of the sixth international conference on aluminium weldments, Cleveland, Ohio; 1995. p. 65–76.
46. Anon. Eurocode 9: design of aluminium structures – Part 2: structures susceptible to fatigue, prENV; 1999.
47. Some considerations in the statistical determination of the shape of S-N curves
48. Hertzberg · 1996
49. Haibach · 1992
50. IIW guideline for the assessment of weld root fatigue10.1007/s40194-013-0066-y ↗
51. Djavit DE, Strande E. Fatigue failure analysis of fillet welded joints used in offshore structures. MSc Thesis, Chalmers University of Technology, Goteborg, Sweden; 2013.
52. Recent developments in local concepts of fatigue assessment of welded joints10.1016/j.ijfatigue.2008.05.019 ↗
53. Radaj · 2006
54. A structural stress definition and numerical implementation for fatigue analysis of welded joints10.1016/S0142-1123(01)00055-X ↗
55. A consideration of allowable equivalent stresses for fatigue design of welded joints according to the notch stress concept with the reference radii rref = 1.00 and 0.05 mm10.1007/BF03266705 ↗
56. Round-robin study on stress analysis for the effective notch stress approach10.1007/BF03266562 ↗
57. Radaj · 1990
58. Fictitious notch rounding concept applied to V-notches with root hole subjected to in-plane mixed mode loading10.1016/j.engfracmech.2014.07.014 ↗
59. Generalised Neuber concept of fictitious notch rounding10.1016/j.ijfatigue.2013.01.005 ↗
60. Application of the fictitious notch rounding approach to notches with end-holes under mode 2 loading
61. Fictitious notch rounding concept applied to V-notches with root holes subjected to in-plane shear loading10.1016/j.engfracmech.2011.11.007 ↗
62. Stress field parameters to predict the fatigue strength of notched components10.1243/0309324991513876 ↗
63. Early development of fatigue cracking at manual fillet welds10.1111/j.1460-2695.1996.tb01312.x ↗
64. State-of-the-art review on the local strain energy density concept and its relation to the J-integral and peak stress method10.1111/ffe.12231 ↗
65. State-of-the-art review on extended stress intensity factor concepts10.1111/ffe.12120 ↗
66. Notch sensitivity
67. Neuber · 1958
68. Engineering formulae for fatigue strength reduction due to crack-like notches10.1007/BF00942722 ↗
69. Atzori B. Trattamenti termici e resistenza a fatica delle strutture saldate. Rivista Italiana della Saldatura, Edited by A.T.A., Genova, Italy, vol. 1; 1983. p. 3–16.
70. Effect of stress amplitudes on statistical variability in fatigue life of 75S–T6 Aluminium Alloy
71. Lee · 2005
72. Gibbons Natrella M. Experimental statistics. National Bureau of Standards, Handbook 91; 1963.10.6028/NBS.HB.91 ↗