X 断面部材の溶接割れに関する研究(第 2 報) : 拘束応力について

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In previous paper the intensity of restraint (K) was clarified quantitatively on the X section member built-up by intermittent weld and the correlation between K of the X section members and those of various cracking test specimens could be established. The experiments were carried out to determine the reaction stress ((σ_ω)_<t=∞>) of the weld joints of all X section members from measuring the dislocation (displacement) (η) and the throat thickness (h_ω) of weld joints. The reaction stress ((σ_ω)_<t=∞>) can be expressed by the following equation, [numerical formula] where η^^^- is the average dislocation value and (h^^^-)_ω is the average throat thickness of weld joints. The results obtained are summarized as follows; 1) The intensity of restraint (K) is concerned with the reaction stress ((σ_ω)_<t=∞>) by linear relation, when K is less than 500kg/mm-mm. The intensity of restraint being greater than 500kg/mm-mm, however, the relation between K and (σ_ω)_<t=∞> changes from linear to courved one. 2) The critical intensity of restraint (K_<cr>) and the critical reaction stress ((σ_ω)_<cr>) depend upon the angle steel size i.e., they are in the curved range of the (σ_ω)_<t=∞> -K diagram on L-150×150×15,but they are in the linear bounds of the above diagram on L-250×250×25. 3) And K_<cr> and (σ_ω)_<cr> do not influence the bead lentgh, but have an important effect upon the angle steel size.
社団法人溶接学会の論文
1969-06-25

X 断面部材の溶接割れに関する研究(第 2 報) : 拘束応力について

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