温度変動下でのねじ締結体の特性 : 被締結体が圧力容器ふた締結体の場合

概要

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The characteristics of a bolted joint, in which the cover of the pressure vessels made of aluminum was fastened at room temperature by bolts and nuts made of steel, were examined when the joint was subjected to heat conduction. With the use of the finite difference method, the temperature distributions in the joint subjected to heat conduction were analyzed. A method for obtaining the increment in bolt axial force and the maximum stress produced in the bolt was proposed. In the experiments, temperature distributions on the joint were measured with thermocouples, and the 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 pressure vessel was heated (cooled) and the outer circumference was kept at room temperature. The analytical results were fairly consistent with the experimerltal results.
社団法人日本機械学会の論文
1993-01-25