Mechanical behavior of bolted joints under steady heat conduction
Mechanical behavior of bolted joints under steady heat conduction
复制标题
稳定热传导下螺栓接头的力学行为
DOI：
10.1115/1.2929557
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发表时间：
1994
影响因子：
1
通讯作者：
T. Hirose
中科院分区：
文献类型：
--
作者：
H. Kumano;T. Sawa;T. Hirose
热交换器中的螺栓连接、内燃机中的气缸盖等都受到热流的影响。为了确定最优设计，有必要检查这种螺栓连接在热变化下的力学行为。本文研究了两个中空圆柱体和两个铝制矩形厚板在室温下用钢制螺栓和螺母连接，并承受热变化或稳定导热的螺栓连接的力学行为。采用有限差分法对节点的温度分布进行了分析。在此基础上，提出了估算螺栓轴向力增量和螺栓产生的最大应力的方法。在实验中，将上述螺栓连接放入炉中。此外，用螺栓和螺母紧固的矩形厚板用电加热器加热。然后，用热电偶测量夹紧部件和螺栓表面的温度。测量了在稳态导热作用下螺栓轴向力的增加和螺栓产生的最大应力。分析结果与实验结果吻合较好。
Bolted joints in heat exchangers, cylinder heads in combustion engines, and so on are subjected in heat fluxes. It is necessary to examine the mechanical behavior of such bolted joints under thermal changes in order to establish an optimal design. This paper deals with mechanical behavior of bolted joints, in which two hollow cylinders and two rectangular thick plates made of aluminum are fastened at room temperature by a bolt and nut made of steel, and are subjected to thermal changes or steady heat conduction. Temperature distributions of the joints are analyzed using the finite difference method. Then, methods of estimating an increment in axial bolt force and a maximum stress produced in the bolts are proposed. In the experiments, the aforementioned bolted joints are put in a furnace. Furthermore, the rectangular thick plates fastened by a bolt and nut are heated by an electric heater. Then, the temperature on the surfaces of the clamped parts and the bolts are measured with thermocouples. The increase in axial bolt force and the maximum stress produced in the bolts under steady heat conduction for thermal changes are measured. The analytical results are in fairly good agreement with the experimental ones.