腐食環境下の高力ボルト摩擦接合の力学性状と信頼性(<小特集>信頼性工学小特集)

概要

論文の詳細を見る
It is an urgent problem to establish a design format for unpainted structures of weathering-proof steel and for painted steel structures exposed to a sea wind,especially for the friction type joint with high strength bolts used in these structures. One of the difficulties involved in this problem is due to the time-dependent properties of the structural joint caused by corrosion. In the present study, to obtain the basic data for design of corroded bolted joints,the static and fatigue test were performed on the corroded specimens of three types of steel SS41, SM50 and SMA50. The results obtained show that the mean value of the slip coefficients of the joint for each type of steel descended slightly with a trend of increasing scattering for longer corrosion period. As for the S-N curve of the specimen composed of steel plate SS41 in which fatigue crack started through the net selection,the slope increased after corrosion,and the fatigue strength for 2×10^6 stress cycles decreased apparently. Based on there results,the variation of the probability of occurrence of slip of the friction type joints were analysed for the cases for which the bolts were clamped by different methods and the joints were corroded acceleratively at various rates.
社団法人日本材料学会の論文
1986-06-15