Fatigue Strength Evaluation of the Load-Carrying Cruciform Fillet Welded Joints Using Hot-Spot Stress

Abstract:

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In this study, fatigue strength of load-carrying cruciform fillet welded joints were evaluated using a new method proposed by Yamada, for geometric or structural stress in welded joint, that is, one-millimeter stress below the surface in the direction corresponding to the expected crack path. Validity of the method is verified by analyzing fatigue test results for load-carrying cruciform welded specimens has different size of weld toe radius, leg length and plate thickness reported in literature. Structural stress concentration factor for 1mm below the surface was calculated by finite element analysis for each specimen respectively. When compared to the basic fatigue resistance curve offered by BS7608, the one-millimeter stress method shows conservative evaluation for load-carrying cruciform fillet welded joints.

Info:

Periodical:

Key Engineering Materials (Volumes 324-325)

Edited by:

M.H. Aliabadi, Qingfen Li, Li Li and F.-G. Buchholz

Pages:

1281-1284

DOI:

10.4028/www.scientific.net/KEM.324-325.1281

Citation:

B. W. Noh et al., "Fatigue Strength Evaluation of the Load-Carrying Cruciform Fillet Welded Joints Using Hot-Spot Stress ", Key Engineering Materials, Vols. 324-325, pp. 1281-1284, 2006

Online since:

November 2006

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Price:

$35.00

[1] BS7608: Code of practice for Fatigue design and assessment of steel structures, (1993).

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DOI: 10.1016/j.ijfatigue.2004.05.001

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DOI: 10.1016/s0142-1123(02)00167-6

[7] Ilkka Poutiainen, Pasi Tanskanen, Gary Marquis: Finite element methods for structural hot spot stress determination -a comparison of procedures, International Journal of Fatigue, Vol. 26(2004), p.1147~1157.

DOI: 10.1016/j.ijfatigue.2004.04.003

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