Observation and prediction of fatigue behavior of spot welded joints with triple thin steel plates under tensile-shear loading

Byoung-Ho Choi, Dong H. Joo, Sam Hong Song

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Spot welding is very commonly used for joining two thin plates, which has useful application in the automotive, aerospace and other industries. For having a complex structure with spot welds, it is necessary to study the fracture and fatigue behavior of spot welds with multiple plates. When tensile-shear load applied to the spot welded structure, the spot welded structure may be deformed into an asymmetric shape when using two or more plates of different thickness. In this paper, fatigue behavior of spot welded triple plates is examined experimentally and the prediction of fatigue lifetime is proposed by the crack opening angle (COA) around the spot weld. The COA obtained experimentally is directly related with well-known fracture parameter, i.e. stress intensity factor, and the COA can be used for the prediction of fatigue strength regardless of the thickness of specimen if the geometry of triple plates is the same. The two different types of spot welded structures were considered to determine the difference of fatigue behavior due to the geometry of spot welding of triple plates under tensile-shear loading.

Original languageEnglish
Pages (from-to)620-627
Number of pages8
JournalInternational Journal of Fatigue
Volume29
Issue number4
DOIs
Publication statusPublished - 2007 Apr 1
Externally publishedYes

Fingerprint

Welded Joints
Steel
Fatigue
Welds
Fatigue of materials
Spot welding
Prediction
Cracks
Crack
Welding
Angle
Geometry
Fatigue Strength
Stress intensity factors
Joining
Thin Plate
Stress Intensity Factor
Complex Structure
Lifetime
Observation

Keywords

  • Crack opening angle
  • Fatigue lifetime
  • Fatigue limit
  • Spot weldments

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Observation and prediction of fatigue behavior of spot welded joints with triple thin steel plates under tensile-shear loading. / Choi, Byoung-Ho; Joo, Dong H.; Song, Sam Hong.

In: International Journal of Fatigue, Vol. 29, No. 4, 01.04.2007, p. 620-627.

Research output: Contribution to journalArticle

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