Abstract
The local stress concentrations around the discontinuities and the weld defects are fairly common. In this study, the investigation of thickness and stress concentration effects on fatigue strength (FAT) have been studied. The fracture mechanics tools and fracture analysis code (Franc2D) were used to consider these effects. The FE simulation of welded joints will provide a tool to determine the regions of stress concentration which in turn determine the crack initiating and FAT. Unfortunately, these tools are unable to calculate FAT at higher thicknesses. Therefore, the crack length was corrected with a suitable scale. The determination of fracture toughness values without the need to undertake experiments have been presented.
Similar content being viewed by others
References
Motarjemi, A.K., Kokabi, A.H., Ziaie, A.A., Manteghi, S., Burdekin, F.M.: Comparison of the stress intensity factor of T and cruciform welded joints with different main and attachment plate thickness. Eng. Fract. Mech. 65(1), 55–66 (2000)
Cornell Fracture Group: http://www.cfg.cornell.edu. Accessed Dec 2012
Al-Mukhtar, A.M., Henkel, S., Biermann, H., Huebner, P.: A finite element calculation of stress intensity factors of cruciform and butt welded joints for some geometrical parameters. J. Mech. Ind. Eng. 3(4), 236–245 (2009)
Al-Mukhtar, A.M., Biermann, H., Henkel, S., Huebner, P.: Comparison of the stress intensity factor of load-carrying cruciform welded joints with different geometries. J. Mater. Eng. Perform. 19(6), 802–809 (2010)
Al-Mukhtar, A.M., Henkel, S., Biermann, H., Huebner, P.: The effect of weld profile and geometries of butt weld joints on fatigue life under cyclic tensile loading. J Mater. Eng. Perform. 20(8), 1385–1391 (2011)
Al-Mukhtar, A.M., Henkel, S., Biermann, H., Huebner, P.: Determination of some parameters for fatigue life in welded joints using fracture mechanics method. J. Mater. Eng. Perform. 19(9), 1225–1234 (2010)
Al-Mukhtar, A.M., Henkel, S., Biermann, H., Huebner, P.: Lebensdauerberechnung Von Schweissverbindungen Mit Bruchmechanischen Methoden. The German Association for Materials Research and Testing (DVM), DVM-Arbeitskreis Bruchvorgänge, Wuppertal, pp. 63–72, 17–18 Feb (2009)
Al-Mukhtar, A.M., Henkel, S., Biermann, H., Huebner, P.: Fatigue crack propagation life calculation in welded joints. In: Proceeding of the International Conference on Crack Paths (CP 2009), Vicenza, pp. 391–397, 23–25 Sept (2009)
Al-Mukhtar, A.M., Henkel, S., Biermann, H., Huebner, P.: Fatigue life prediction of fillet welded cruciform joints based on fracture mechanics method. In: Proceeding of the 2nd Int Conference on Fatigue and Fracture in the Infrastructure, Philadelphia, 26–29 July (2009)
Al-Mukhtar, A.: The safety analyses concept of welded component under cycle loads using fracture mechanics method. Ph.D. thesis, TUBA, Freiberg (2010)
Hobbacher, A.: Recommendations for fatigue design of welded joints and components. IIW Doc., No XIII-1965r14-03/XV-1127r14-03, International Institute of Welding (2006)
Hobbacher, A.: Recommendations for fatigue design of welded joints and components. IIW Document XIII-2151-07/XV-1254-07, International Institute of Welding-IIW/IIS (2007)
Lindqvist, J.: Fatigue strengths thickness dependence in welded construction. M.Sc. thesis, Borlänge (2002)
Poutiainen, I., Marquis, G.: A fatigue assessment method based on weld stress. Int. J. Fatigue 28(9), 1037–1046 (2006)
Engesvik, K.: Analysis of the uncertainty of the fatigue capacity of welded joints. NTNU, Trondheim, UR-82-17 (1983)
BSI7910: PD 6493 British Standard Institution, London, Appendix J:29 (1997)
Blake, A.: Practical Fracture Mechanics in Design. Marcel Dekker, New York (1996)
Nykänen, T., Li, X., Björk, T., Marquis, G.: A parametric fracture mechanics study of welded joints with toe cracks. Eng. Fract. Mech. 72(10), 1580–1609 (2005)
Wawrzynek, P., Ingraffea, A.: FRANC2D: a two-dimensional crack propagation simulator, Version 2.7 user’s guide. NASA Contractor Report 4572 (1994)
Alam, M.S.: Structural integrity and fatigue crack propagation life assessment of welded and weld-repaired structures. Ph.D. dissertation, Louisiana State University, Baton Rouge (2005)
Lawrence, F.V.: Overview of Weldment Fatigue Life Prediction. University of Illinois, Urbana (1985)
Lassen, T., Recho, N.: Fatigue Life Analyses of Welded Structures. ISTE Ltd, London (2006)
Acknowledgements
The author would like to thankfully appreciate the support received from the Technische Universität Bergakademie Freiberg, Faculty of Geosciences and Geoengineering, Department for Geology, Germany. The support from the International Institute of Education, USA, is gratefully appreciated. The fruitful discussions with Dr. Z. Barsoum, from the Royal Institute of Technology, Department of Aeronautical and Vehicle Engineering, Stockholm, Sweden are also gratefully acknowledged.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Al-Mukhtar, A.M. Investigation of the Thickness Effect on the Fatigue Strength Calculation. J Fail. Anal. and Preven. 13, 63–71 (2013). https://doi.org/10.1007/s11668-012-9629-2
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11668-012-9629-2