Assessment of stress intensity factors for load-carrying fillet welded cruciform joints using a digital camera

Hsin-Yang Chung, S. H. Liu, R. S. Lin, Shen-Haw Ju

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

This paper presents an experimental method to determine the stress intensity factors (SIFs) of load-carrying fillet welded cruciform joints. This experimental method measured the crack opening displacements (CODs) of the cruciform joint detail by a common digital camera, and utilized the acquired COD data to derive the SIF for the joint detail by a suggested least-squares procedure. A total of fifteen fillet welded cruciform joint specimens were tested and analyzed in this study. The test results were compared with the SIF formula provided in British Standard 7910, and showed that the demonstrated experimental method is able to give satisfactory SIF evaluation for fillet welded cruciform joints. In fact, this method can be applied to determine the SIF of any detail with surface crack where the Irwin's series solution for crack tip displacement fields is valid. Moreover, the simplicity and portability of this method make the field measurement of SIF possible and provide a good means to acquire SIFs directly from details at the site. This is very useful for fatigue evaluation of details in structures, such as steel bridges or offshore structures.

Original languageEnglish
Pages (from-to)1861-1872
Number of pages12
JournalInternational Journal of Fatigue
Volume30
Issue number10-11
DOIs
Publication statusPublished - 2008 Oct 1

Fingerprint

Welded Joints
Digital Camera
Digital cameras
Stress Intensity Factor
Stress intensity factors
Loads (forces)
Welds
Cracks
Crack
Offshore Structures
Steel bridges
Surface Crack
Offshore structures
Portability
Series Solution
Evaluation
Crack Tip
Crack tips
Fatigue
Least Squares

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Mechanics of Materials

Cite this

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abstract = "This paper presents an experimental method to determine the stress intensity factors (SIFs) of load-carrying fillet welded cruciform joints. This experimental method measured the crack opening displacements (CODs) of the cruciform joint detail by a common digital camera, and utilized the acquired COD data to derive the SIF for the joint detail by a suggested least-squares procedure. A total of fifteen fillet welded cruciform joint specimens were tested and analyzed in this study. The test results were compared with the SIF formula provided in British Standard 7910, and showed that the demonstrated experimental method is able to give satisfactory SIF evaluation for fillet welded cruciform joints. In fact, this method can be applied to determine the SIF of any detail with surface crack where the Irwin's series solution for crack tip displacement fields is valid. Moreover, the simplicity and portability of this method make the field measurement of SIF possible and provide a good means to acquire SIFs directly from details at the site. This is very useful for fatigue evaluation of details in structures, such as steel bridges or offshore structures.",
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Assessment of stress intensity factors for load-carrying fillet welded cruciform joints using a digital camera. / Chung, Hsin-Yang; Liu, S. H.; Lin, R. S.; Ju, Shen-Haw.

In: International Journal of Fatigue, Vol. 30, No. 10-11, 01.10.2008, p. 1861-1872.

Research output: Contribution to journalArticle

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