ELASTIC STRENGTH OF HIGH PRESSURE VESSELS WITH A RADIAL CIRCULAR CROSS BORE

The purpose of this study was to determine elastic strength of a high pressure vessel with a radial circular cross bore, for various thickness ratios and cross bore sizes. Seven cross bored cylinders with thickness ratios between 1.4 and 3.0, having both small and large radial circular cross bore were studied. Three dimensional linear finite element analyses were used in this work. It was found that unlike in plain cylinders, the difference in the magnitude of working stresses between the Von Mises' and Tresca's theories in cylinders with radial circular cross bore was insignificant. Besides, the effects of cross bore size and thickness ratio on shearing and working stresses were observed to exhibit similar stress distribution patterns. The magnitude of the working stress in the cylinder increased with the cross bore size, reaching an overall stress factor range of 2.5 to 7.07.