船体用大径鋲に関する研究(第3報, 完結) : 大型鋲継手試験片による実験

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This report describes an experimental investigation on relation between tensile load and watertightness of actual riveted joints. Tests were conducted in order to check the results on the fundamental matters already reported in the previous papers on the basis of the actual size experiments and also to ascertain whether smaller rivets than required might be used for thick plates or not.The results obtained from this series of tests are as follows : 1) Mean values of λ in spring constant k=λE (cf. Second Report) derived from test results are 0.25 and 0.58 for pan-headed and countersunk-headed rivets respectively.2) Leakage from caulked part and each edge of rivet head and point starts differing in time, however, leakage from head edge starts rather earlier than that from point edge.3) Leakage is likely to start, when slip amount of riveted joint reaches 0.1 mm.4) Slip loads estimated from clamping force of rivet and friction coefficient of steel plate as rolled fairly well coincide with test results.5) Approximate method to evaluate critical load for watertightness of riveted seam joint was introduced.6) From viewpoint of watertightness of riveted seam joint, where 2-row 4 d (pitch of rivets) 36 mmφ rivets are required, 2-row 3.5 d 32 mmφ rivets or 3-row 4.5 d 28 mmφ rivets may be used. And also, where 2-row 4 d 32 mmφ rivets are required, 2-row 3.5 d 28 mmφ rivets may be substituted.
社団法人日本船舶海洋工学会の論文