内圧作用下でのステンレス鋼管継手におけるFEM応力解析と密封性能評価(G03-4 応力解析(2),G03 材料力学)

概要

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Stainless steel fittings have been widely used in mechanical structures. It is well known that the leakage in the fittings used sealing tapes is less than that without the sealing tapes. This paper deals with the FEM stress analysis of the fittings subjected to internal pressure. In the FEM calculations, the engaged screw threads are taken into consideration as helical threads in the three-dimension. The leakage tests for the fittings under internal pressure were also conducted by using liquid (oil). Using the results of the leakage tests and the calculated stress states in the fittings, the sealing performance of the fittings under internal pressure was evaluated and the effect of the tightening torque was clarified on the sealing performance. In addition, the numerical results were compared with the experimental results. As the result, the effects of the sealing tapes on the contact stress distributions were also clarified.
一般社団法人日本機械学会の論文
2004-09-04