J.M. Kihiu, G.O. Rading and S. M. Mutuli Geometric Constants in Plain Cross-Bored Cylinders J. Pressure Vessel Technology, 125 (2003) p 446-453

Citation:
O PROFRADINGGEORGE. "J.M. Kihiu, G.O. Rading and S. M. Mutuli Geometric Constants in Plain Cross-Bored Cylinders J. Pressure Vessel Technology, 125 (2003) p 446-453.". In: Mountain Research and Development, vol. 8, no. 2. 2011; 2003.

Abstract:

A 3D FEM computer program was developed to establish the stress distributions and SCFs in thick walled cylinders with radiused entry flush and non-protruding cross bores under internal pressure. The displacement formulation and eight noded brick isoparametric elements were used. The Frontal solution technique was used due to the limited computing facilities. The variation of SCF with entry radius to main bore radius ratio was established for varying cylinder outer radius to main bore radius ratio and cross bore to main bore radius ratio. For low values of cylinder outer radius to main bore radius ratio (≤2.25), the lower values of cross bore to main bore radius ratio resulted in lower SCFs. For high values of cylinder outer radius to main bore radius ratio (>2.25),  the lower values of cross bore to main bore radius ratio resulted in higher SCFs. The cylinder with cylinder outer radius to main bore radius ratio of 2.25 was found to be a transition geometry. For very small values of cross bore to main bore radius ratio, the SCFs converged to a value of 2.2 for entry radius to main bore radius ratio of 0.2. The cylinder outer radius to main bore radius ratio of 1.75 to 3 cylinders had a constant SCF value of 2.3 at cross bore to main bore radius ratio of 0.05 and entry radius to main bore radius ratio of 0.2. A new categorization of cylinders earlier proposed in the study of plain cross-bored cylinders is further validated.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

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