Analytical method for distribution of metallic gasket contact stress

Xiu Feng; Boqing Gu; Long Wei; Jianjun Sun

doi:10.1117/12.839018

24 August 2009 Analytical method for distribution of metallic gasket contact stress

Xiu Feng, Boqing Gu, Long Wei, Jianjun Sun

Proceedings Volume 7375, ICEM 2008: International Conference on Experimental Mechanics 2008; 73750F (2009) https://doi.org/10.1117/12.839018
Event: International Conference on Experimental Mechanics 2008 and Seventh Asian Conference on Experimental Mechanics, 2008, Nanjing, China

Abstract

Metallic gasket seals have been widely used in chemical and petrochemical plants. The failure of sealing system will lead to enormous pecuniary loss, serious environment pollution and personal injury accident. The failure of sealing systems is mostly caused not by the strength of flanges or bolts but by the leakage of the connections. The leakage behavior of bolted flanged connections is related to the gasket contact stress. In particular, the non-uniform distribution of this stress in the radial direction caused by the flange rotational flexibility has a major influence on the tightness of bolted flanged connections. In this paper, based on Warters method and considering the operating pressure, the deformation of the flanges is analyzed theoretically, and the formula for calculating the angle of rotation of the flanges is derived, based on which and the mechanical property of the gasket material, the method for calculating the gasket contact stresses is put forward. The maximum stress at the gasket outer flank calculated by the analytical method is lower than that obtained by numerical simulation, but the mean stresses calculated by the two methods are nearly the same. The analytical method presented in this paper can be used as an engineering method for designing the metallic gasket connections.

Citation Download Citation

Xiu Feng, Boqing Gu, Long Wei, and Jianjun Sun "Analytical method for distribution of metallic gasket contact stress", Proc. SPIE 7375, ICEM 2008: International Conference on Experimental Mechanics 2008, 73750F (24 August 2009); https://doi.org/10.1117/12.839018

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