論文

査読有り
2015年11月2日

Tensile shear strength of laser lap joints

Welding International
  • Seiji Furusako
  • ,
  • Yasunobu Miyazaki
  • ,
  • Yoshiaki Akiniwa

29
11
開始ページ
838
終了ページ
846
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1080/09507116.2014.921078
出版者・発行元
Taylor and Francis Ltd.

This study was aimed at establishment of a model that can predict tensile shear strength and fracture portion of laser-welded lap joints in the tensile test. To clear the influence of bead length and bead width on them, the joints that used steel sheets with a thickness in the range of 0.8–1.2 mm were evaluated. It was found that the tensile shear strength increases with the bead size, and the fracture occurs at base metal (BM), weld metal (WM) or a portion between them with a curvature heat-affected zone (HAZ), in the tensile test. Also to clarify the rotational deformation process around WM during the tensile test, cross-sections of joints were observed, which were applied to several loads in the tensile test. This observation derived the relationship between the radius, R&lt
inf&gt
i&lt
/inf&gt
, at the inner plane of the HAZ and the rotational angle at the centre of the sheet thickness. Furthermore, the relationship between Ri and the applied load was obtained by linear regression. A plastic analysis for deformation of the joints was carried out based on these functions and some assumptions. These assumptions consider that the joint consists of BM, WM and HAZ, which are under a simplified stress mode. Finally, estimation of the tensile shear strength and the fracture portion of the joints was achieved. This estimation made good accordance with the experimental results.

リンク情報
DOI
https://doi.org/10.1080/09507116.2014.921078
ID情報
  • DOI : 10.1080/09507116.2014.921078
  • ISSN : 1754-2138
  • ISSN : 0950-7116
  • SCOPUS ID : 84930928819

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