This paper deals with the characteristics of bolted joints under thermal changes or subjected to heat conduction. The bolted joints, which were consisted of rectangular thick plates or hollow cylinders made of aluminum alloy and were fastened at room temperature by a steel tap bolt, were examined. In the experiments, temperature distributions in the joint consisted of the hollow cylinders were measured with thermocouples, and an increment of axial bolt force produced In the bolt due to a difference In the linear thermal expansion coefficients was measured by strain gauges. The temperature distributions in bolted joints of hollow cylinders subjected to heat conduction were analyzed by the finite difference method. A method for obtaining an increment of axial bolt force produced in the bolt was proposed. The analytical results were fairy coincided with the experimental ones.
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