Investigation on Effect of Shrinkage Allowance to the Fatigue Life of Compound Cylinders Operating at High Pressure


Aydın M., Yapan Y. F. , Türköz M.

International Conference on Engineering Technologies (ICENTE’20), Konya, Turkey, 19 - 21 November 2020, pp.370-374

  • Publication Type: Conference Paper / Full Text
  • City: Konya
  • Country: Turkey
  • Page Numbers: pp.370-374

Abstract

In this study, the fatigue life of a shrink-fitted two-layer cylinder operating under high pressure is estimated by using Finite Element Method (FEM). The cylinders material used in this investigation is AISI 4140 steel. In this context, the fatigue life of the inner and outer cylinders was determined under 300 MPa pressure depending on the one-sided shrinkage tolerance. In the study, 11 different shrinkage allowance were used. The optimum shrinkage allowance was determined according to the fatigue life of the two cylinders. Accordingly, when the shrinkage allowance increased, the life of the inner cylinder increased up to 189.73 times, while the life of the outer cylinder decreased by 99.8%. In addition, the fatigue life values of the two-layer cylinders were compared with the fatigue life of the single-layer cylinder with the same geometric dimensions. While the life value was obtained as 5586 in the single layer cylinder, this value was calculated as 9530 even in the double layer cylinder with a shrinkage allowance of 0.01 mm. As a result, it has been found that using shrink-fitted two-layer cylinders are more advantageous in terms of fatigue life than single-layer cylinders.