温度変動下でのねじ締結体の特性 : 被締結体が金属ガスケット付き管フランジの場合

概要

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The characteristics of a bolted joint, in which a couple of pipe flanges made of aluminum were fastened at room temperature by nuts and bolts made of steel, were examined when the joint was subjected to heat conduction. In the experiments, temperature distributions of the joint were measured with thermocouples, and an increment in bolt axial force, the maximum stress in the bolt and stress produced at the hub of the flange due to the difference in the coefficients of linear expansion were measured by strain gauges for high temperature use when the inner circumference of the pipe flange was heated and the outer circumference was kept at room temperature. With the use of the finite difference method, the temperature distributions in the joint subjected to heat conduction were analyzed. A method by which to obtain an increment in bolt axial force and the maximum stress produced in the bolt was proposed. The analytical results were fairly consistent with the experimental results.
社団法人日本機械学会の論文
1992-09-25