STUDY OF ELASTIC STRENGTH FOR CYLINDRICAL VESSELS WITH LATERAL UNDER INTERNAL PRESSURE

摘要

The objective of this work is to study the elastic stress distribution, deformation characteristic, stress concentration and stress concentration factor of three full scale vessels with different structure dimension and lateral angelθ（θ＝30°，45°，60°）under internal pressure by both experimental and three dimensional nonlinear finite element methods. The results of experiment and three-dimensional nonlinear finite element method are in good agreement. Distinct stress concentration occurs. The intersection region shrinks in the longitudinal section of cylinder, while bulge appears in the transverse section. The maximum stress of the structure occurs at acute side of nozzle-cylinder intersection in the longitudinal section of cylinder. When d/D, D/T, t/T radios of the structure are fixed, stress concentration factor at the most dangerous point of the structure decreases with the incensement of lateral angel θ.