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Lee, Hyung-Yil;Kim, Bum-Joon;Han, Byoung-Kee
- Transactions of the Korean Society of Mechanical Engineers A
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- v.26 no.12
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- pp.2703-2714
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- 2002
In this work, energy absorption characteristics and optimal welding space of spot-welded square hat type tube are investigated via quasi-static crush experiments and finite element (FE) analyses. A FE model reflecting the crush characteristics is established based on the experimentally observed crush mechanisms of specimens with welding spaces (20, 30 & 45 mm) and (25,40 & 55 mm) respectively for two specimen widths (60, 75 mm). The established FE model is then applied to other crush models of widths (50, 60 & 75 mm) with various welding spaces (20, 25, 30, 40, 45, 55, 75, 150, 300 mm) respectively. We examine the energy absorption characteristics with respect to the welding space for each specimen width. The outcome suggests an optimal spot welding space of square hat type thin-walled tube. Energy absorption is also presented in terms of yield strength of base metal, specimen thickness, width, and mean crushing force of spot-welded square hat type thin-walled tube.
https://doi.org/10.3795/KSME-A.2002.26.12.2703 인용 PDF KSCI

Kang, S.W.;Ha, W.I.;Shin, J.S.;Jang, T.W.;Jae, J.S.
- Journal of the Society of Naval Architects of Korea
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- v.33 no.4
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- pp.133-141
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- 1996
The mode of fatigue failure is depended on the characteristics of the fatigue crack initiated and propagated from the weld toe and the weld root in the load-carrying fillet welded joints. The characteristics of fatigue crack are deeply affected by the geometry of fillet and the stress range. The purpose of this study is to investigate critical weld size and stress range in order to occur toe failure under pulsating tension loading in the load-carrying fillet welded cruciform joints.
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