内部流体加熱を受ける平面座ガスケット付管フランジ締結体の軸対称三次元熱応力解析

概要

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Thermal stress distribution of pipe flange connections with a raised-face gasket subjected to heat conduction in steady state are analyzed by using the thermoelastic displacement potential and Michell's stress function based on the axisymmetrical theory of elasticity. In the analysis, pipe flanges, hubs of pipe flange and a raised-face gasket are replaced by finite hollow cylinders, respectively. In the numerical calculations, the effects of the ratios of linear thermal expansion coefficients, Young's moduli and the thicknesses between the pipe flange and the gasket on the contact stress distribution are examined. As a result, it is seen that the thermal stress at the inner and the outer surfaces of the gasket increases with a decrease of Young's moduli ratio and the gasket thickness. In addition, experiments were performed to measure temperature, the variations of axial bolt force and strains at hubs of pipe flanges. Fairly good agreement is seen between the analytical and the experimental results.
社団法人日本機械学会の論文
1998-12-25