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http://dx.doi.org/10.3744/SNAK.2013.50.1.41

Notch Strain Analysis of Cruciform Welded Joint using Nonlinear Kinematic Hardening Model  

Kim, Yooil (Department of Naval Architecture and Ocean Engineering, Inha University)
Kim, Kyung-Su (Department of Naval Architecture and Ocean Engineering, Inha University)
Publication Information
Journal of the Society of Naval Architects of Korea / v.50, no.1, 2013 , pp. 41-48 More about this Journal
Abstract
Several fatigue damages have recently been reported which cannot be resolved in the context of the existing fatigue design procedure, and they are suspected to be the cracks induced by the low cycle fatigue mechanism. To tackle the problem, a series of material tests together with fatigue tests have been carried out, and elasto-plastic notch strain analysis using nonlinear kinematic hardening model has been performed. The cyclic stress-strain curves are obtained and the nonlinear kinematic hardening model was calibrated based on the obtained material data. Also, the fatigue test with non-load-carrying cruciform fillet welded joint has been performed in low cycle fatigue regime. Then, the notch strain analyses have been carried out to find the precise elasto-plastic behavior of the material at the notch root of the cruciform joint. The variation of the material property from the base metal via HAZ up to the weld metal was taken into account using spatial variation of the material property. Then the detail elasto-plastic behavior of the welded joint subjected to the repeated cyclic loading has been investigated further through the comparison with the prediction with Neuber's rule. The calibration of the nonlinear kinematic hardening model and nonlinear notch strain analyses have been performed using the commercial FE program ABAQUS.
Keywords
Low cycle fatigue; Nonlinear kinematic hardening model; Neuber rule; Finite element analysis; Cruciform joint;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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1 Baumel, A. & Seeger, T., 1990. Materials Data for Cyclic Loading, Suppl 1. Elsevier Science: Amsterdam.
2 BS, 1997. BS5500 Specification for Unfired Fusion Welded Pressure Vessels.
3 DNV, 2010. Classfication Notes No. 30.7 Fatigue Assessment of Ship Structures.
4 Fricke, W. & Paetzold, H., 1987. Application of the Cyclic Strain Approach to the Fatigue Failure of Ship Structural Details. Journal of Ship Research, 31(3). pp.177-185.
5 Hobbacher, A., 1996. Fatigue Design of Welded Joints and Components-Recommendations of IIW. Abington Publishing: Cambridge, UK.
6 Kim, K.S. et al., 2006. Effect of Local Strain on Low Cycle Fatigue Using EPSI System. Journal of the Society of Naval Architecture of Korea, 43(2). pp.213-219.   DOI   ScienceOn
7 Kim, Y. Kang, J.K. & Heo, J.H., 2004. Application of 1mm fictitious notch radius approach to the fatigue strength assessment of welded joint. Annual Conference of the Korean Welding and Joining Society, 11-12 November 2004.
8 Lee, J.B. et al., 2006. Cyclic Stress-strain Hardening Model of AC4C-T6 Alloy at Cryogenic Temperature. Journal of the Society of Naval Architecture of Korea, 43(5), pp.498-509.   과학기술학회마을   DOI   ScienceOn
9 Radaj, D. & Sonsino, C.M., 1998. Fatigue Assessment of Welded Joints by Local Approaches. Abington Publishing: Cambridge, UK.
10 Urm, H.S., 2000. Low Cycle Fatigue Criteria for Ship Structures-Background of CN30.7 Addendum, DNV Technical Report.