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Investigations of strength and leak tightness of wave-ring gasket

100%

Trojnacki A., Szybiński B.

Czasopismo Techniczne

The paper deals with stress-strain analysis and estimation of leak tightness of wave-ring gaskets. The investigations are carried out using the simplified analytical approach. A cylindrical shell of constant mean thickness is introduced to simulate the gasket. It is assumed that the shell is simply supported at the inner surface of the seat. The influence of certain geometric and assembly parameters on the strength and leak tightness of the closure is analytically investigated. The results are presented in dimensionless variables in order to generalise the conclusions. The analytical solution is verified by FEM calculations and compared with the experimental results.

Modification of stress distribution in walls of pressure vessels

81%

Krasiński M., Stodulski M., Trojnacki A.

Czasopismo Techniczne

The paper deals with stress modification in thick-walled pressure vessels realized by means of specific initial stresses introduced into the structure during the manufacturing process. Several technologies were investigated with the aim to determine the initial interlayer interferences, tension forces of layers or autofrettage pressure. Realization of such determined technological parameters leads to better, more equalized stress distribution in the vessel wall under operating pressure with respect to solid or multi-layer wall without additional treatment. As a result the maximum equivalent stress of the wall decreases and cheaper material of lower strength properties may be applied. Analytical solution is illustrated with a numerical example.

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2 Czasopismo Techniczne

1 2016

1 2015

2 Trojnacki A.

1 Krasiński M.

1 Stodulski M.

1 Szybiński B.

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Investigations of strength and leak tightness of wave-ring gasket

Modification of stress distribution in walls of pressure vessels